condeval is called jump threading now
[cparser] / main.c
diff --git a/main.c b/main.c
index c78b1f3..b93ac30 100644 (file)
--- a/main.c
+++ b/main.c
@@ -1,6 +1,6 @@
 /*
  * This file is part of cparser.
- * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
+ * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
 #define fdopen(fd, mode)         _fdopen(fd, mode)
 #define popen(cmd, mode)         _popen(cmd, mode)
 #define pclose(file)             _pclose(file)
+#define unlink(filename)         _unlink(filename)
 
 #else
 #include <unistd.h>
 #define HAVE_MKSTEMP
 #endif
 
-#ifndef WITH_LIBCORE
-#define WITH_LIBCORE
-#endif
-
 #include <libfirm/firm.h>
 #include <libfirm/be.h>
 
 #include "types.h"
 #include "type_hash.h"
 #include "parser.h"
+#include "type_t.h"
 #include "ast2firm.h"
 #include "diagnostic.h"
 #include "lang_features.h"
 #include "driver/firm_opt.h"
 #include "driver/firm_cmdline.h"
 #include "adt/error.h"
-#include "write_fluffy.h"
+#include "wrappergen/write_fluffy.h"
+#include "wrappergen/write_caml.h"
+#include "wrappergen/write_jna.h"
 #include "revision.h"
 #include "warning.h"
+#include "mangle.h"
 
 #ifndef PREPROCESSOR
-#define PREPROCESSOR "cpp -std=c99 -U__WCHAR_TYPE__ -D__WCHAR_TYPE__=int"
+#ifndef __WIN32__
+#define PREPROCESSOR "gcc -E -m32 -U__STRICT_ANSI__"
+#else
+#define PREPROCESSOR "cpp -m32 -U__STRICT_ANSI__"
+#endif
 #endif
 
 #ifndef LINKER
 #endif
 
 #ifndef ASSEMBLER
+#ifdef __APPLE__
+#define ASSEMBLER "gcc -c -xassembler"
+#else
 #define ASSEMBLER "as --32"
 #endif
+#endif
 
 /** The current c mode/dialect. */
-unsigned int c_mode = _C89|_C99|_GNUC;
+unsigned int c_mode = _C89 | _ANSI | _C99 | _GNUC;
 
 /** The 'machine size', 16, 32 or 64 bit, 32bit is the default. */
 unsigned int machine_size = 32;
@@ -102,14 +111,61 @@ bool char_is_signed = true;
 /** true for strict language checking. */
 bool strict_mode = false;
 
+/** use builtins for some libc functions */
+bool use_builtins = false;
+
+/** we have extern function with const attribute. */
+bool have_const_functions = false;
+
+atomic_type_kind_t wchar_atomic_kind = ATOMIC_TYPE_INT;
+
 /* to switch on printing of implicit casts */
 extern bool print_implicit_casts;
 
 /* to switch on printing of parenthesis to indicate operator precedence */
 extern bool print_parenthesis;
 
-static int            verbose;
-static struct obstack cppflags_obst, ldflags_obst;
+static int             verbose;
+static struct obstack  cppflags_obst, ldflags_obst;
+static char            dep_target[1024];
+static const char     *outname;
+
+typedef enum lang_standard_t {
+       STANDARD_DEFAULT, /* gnu99 (for C, GCC does gnu89) or gnu++98 (for C++) */
+       STANDARD_ANSI,    /* c89 (for C) or c++98 (for C++) */
+       STANDARD_C89,     /* ISO C90 (sic) */
+       STANDARD_C90,     /* ISO C90 as modified in amendment 1 */
+       STANDARD_C99,     /* ISO C99 */
+       STANDARD_GNU89,   /* ISO C90 plus GNU extensions (including some C99) */
+       STANDARD_GNU99,   /* ISO C99 plus GNU extensions */
+       STANDARD_CXX98,   /* ISO C++ 1998 plus amendments */
+       STANDARD_GNUXX98  /* ISO C++ 1998 plus amendments and GNU extensions */
+} lang_standard_t;
+
+static lang_standard_t standard;
+
+typedef struct file_list_entry_t file_list_entry_t;
+
+typedef enum filetype_t {
+       FILETYPE_AUTODETECT,
+       FILETYPE_C,
+       FILETYPE_PREPROCESSED_C,
+       FILETYPE_CXX,
+       FILETYPE_PREPROCESSED_CXX,
+       FILETYPE_ASSEMBLER,
+       FILETYPE_PREPROCESSED_ASSEMBLER,
+       FILETYPE_OBJECT,
+       FILETYPE_IR,
+       FILETYPE_UNKNOWN
+} filetype_t;
+
+struct file_list_entry_t {
+       const char  *name; /**< filename or NULL for stdin */
+       filetype_t   type;
+       file_list_entry_t *next;
+};
+
+static file_list_entry_t *temp_files;
 
 #if defined(_DEBUG) || defined(FIRM_DEBUG)
 /**
@@ -140,36 +196,41 @@ static void initialize_firm(void)
 static void get_output_name(char *buf, size_t buflen, const char *inputname,
                             const char *newext)
 {
-       size_t last_dot = 0xffffffff;
-       size_t i = 0;
-
-       if(inputname == NULL) {
-               snprintf(buf, buflen, "a%s", newext);
-               return;
-       }
-
-       for(const char *c = inputname; *c != 0; ++c) {
-               if(*c == '.')
-                       last_dot = i;
-               ++i;
-       }
-       if(last_dot == 0xffffffff)
-               last_dot = i;
-
-       if(last_dot >= buflen)
-               panic("filename too long");
-       memcpy(buf, inputname, last_dot);
-
-       size_t extlen = strlen(newext) + 1;
-       if(extlen + last_dot >= buflen)
+       if (inputname == NULL)
+               inputname = "a";
+
+       char const *const last_slash = strrchr(inputname, '/');
+       char const *const filename   =
+               last_slash != NULL ? last_slash + 1 : inputname;
+       char const *const last_dot   = strrchr(filename, '.');
+       char const *const name_end   =
+               last_dot != NULL ? last_dot : strchr(filename, '\0');
+
+       int const len = snprintf(buf, buflen, "%.*s%s",
+                       (int)(name_end - filename), filename, newext);
+#ifdef _WIN32
+       if (len < 0 || buflen <= (size_t)len)
+#else
+       if (buflen <= (size_t)len)
+#endif
                panic("filename too long");
-       memcpy(buf+last_dot, newext, extlen);
 }
 
+#include "builtins.h"
+
 static translation_unit_t *do_parsing(FILE *const in, const char *const input_name)
 {
+       start_parsing();
+
+       if (use_builtins) {
+               lexer_open_buffer(builtins, sizeof(builtins)-1, "<builtin>");
+               parse();
+       }
+
        lexer_open_stream(in, input_name);
-       translation_unit_t *unit = parse();
+       parse();
+
+       translation_unit_t *unit = finish_parsing();
        return unit;
 }
 
@@ -180,72 +241,192 @@ static void lextest(FILE *in, const char *fname)
        do {
                lexer_next_preprocessing_token();
                print_token(stdout, &lexer_token);
-               puts("");
-       } while(lexer_token.type != T_EOF);
+               putchar('\n');
+       } while (lexer_token.type != T_EOF);
 }
 
-static FILE *preprocess(FILE *in, const char *fname)
+static void add_flag(struct obstack *obst, const char *format, ...)
 {
-       char buf[4096];
-       obstack_1grow(&cppflags_obst, '\0');
-       const char *flags = obstack_finish(&cppflags_obst);
+       char buf[65536];
+       va_list ap;
 
-       if(in != stdin) {
-               snprintf(buf, sizeof(buf), PREPROCESSOR " %s %s", flags, fname);
-       } else {
-               /* read from stdin */
-               snprintf(buf, sizeof(buf), PREPROCESSOR " %s -", flags);
+       va_start(ap, format);
+#ifdef _WIN32
+       int len =
+#endif
+               vsnprintf(buf, sizeof(buf), format, ap);
+       va_end(ap);
+
+       obstack_1grow(obst, ' ');
+#ifdef _WIN32
+       obstack_1grow(obst, '"');
+       obstack_grow(obst, buf, len);
+       obstack_1grow(obst, '"');
+#else
+       /* escape stuff... */
+       for (char *c = buf; *c != '\0'; ++c) {
+               switch(*c) {
+               case ' ':
+               case '"':
+               case '$':
+               case '&':
+               case '(':
+               case ')':
+               case ';':
+               case '<':
+               case '>':
+               case '\'':
+               case '\\':
+               case '\n':
+               case '\r':
+               case '\t':
+               case '`':
+               case '|':
+                       obstack_1grow(obst, '\\');
+                       /* FALLTHROUGH */
+               default:
+                       obstack_1grow(obst, *c);
+                       break;
+               }
        }
+#endif
+}
+
+static const char *type_to_string(type_t *type)
+{
+       assert(type->kind == TYPE_ATOMIC);
+       return get_atomic_kind_name(type->atomic.akind);
+}
+
+static FILE *preprocess(const char *fname, filetype_t filetype)
+{
+       static const char *common_flags = NULL;
+
+       if (common_flags == NULL) {
+               obstack_1grow(&cppflags_obst, '\0');
+               const char *flags = obstack_finish(&cppflags_obst);
+
+               /* setup default defines */
+               add_flag(&cppflags_obst, "-U__WCHAR_TYPE__");
+               add_flag(&cppflags_obst, "-D__WCHAR_TYPE__=%s", type_to_string(type_wchar_t));
+               add_flag(&cppflags_obst, "-U__SIZE_TYPE__");
+               add_flag(&cppflags_obst, "-D__SIZE_TYPE__=%s", type_to_string(type_size_t));
+
+               add_flag(&cppflags_obst, "-U__VERSION__");
+               add_flag(&cppflags_obst, "-D__VERSION__=\"%s\"", cparser_REVISION);
+
+               /* TODO hack... */
+               add_flag(&cppflags_obst, "-D__builtin_abort=abort");
+               add_flag(&cppflags_obst, "-D__builtin_abs=abs");
+               add_flag(&cppflags_obst, "-D__builtin_exit=exit");
+               add_flag(&cppflags_obst, "-D__builtin_malloc=malloc");
+               add_flag(&cppflags_obst, "-D__builtin_memcmp=memcmp");
+               add_flag(&cppflags_obst, "-D__builtin_memcpy=memcpy");
+               add_flag(&cppflags_obst, "-D__builtin_memset=memset");
+               add_flag(&cppflags_obst, "-D__builtin_strlen=strlen");
+               add_flag(&cppflags_obst, "-D__builtin_strcmp=strcmp");
+               add_flag(&cppflags_obst, "-D__builtin_strcpy=strcpy");
+
+               if (flags[0] != '\0') {
+                       size_t len = strlen(flags);
+                       obstack_1grow(&cppflags_obst, ' ');
+                       obstack_grow(&cppflags_obst, flags, len);
+               }
+               common_flags = obstack_finish(&cppflags_obst);
+       }
+
+       assert(obstack_object_size(&cppflags_obst) == 0);
+       obstack_printf(&cppflags_obst, "%s ", PREPROCESSOR);
+       switch (filetype) {
+       case FILETYPE_C:
+               add_flag(&cppflags_obst, "-std=c99");
+               break;
+       case FILETYPE_CXX:
+               add_flag(&cppflags_obst, "-std=c++98");
+               break;
+       case FILETYPE_ASSEMBLER:
+               add_flag(&cppflags_obst, "-x");
+               add_flag(&cppflags_obst, "assembler-with-cpp");
+               break;
+       default:
+               break;
+       }
+       obstack_printf(&cppflags_obst, "%s", common_flags);
+
+       /* handle dependency generation */
+       if (dep_target[0] != '\0') {
+               add_flag(&cppflags_obst, "-MF");
+               add_flag(&cppflags_obst, dep_target);
+               if (outname != NULL) {
+                               add_flag(&cppflags_obst, "-MQ");
+                               add_flag(&cppflags_obst, outname);
+               }
+       }
+       add_flag(&cppflags_obst, fname);
 
-       if(verbose) {
+       obstack_1grow(&cppflags_obst, '\0');
+       char *buf = obstack_finish(&cppflags_obst);
+       if (verbose) {
                puts(buf);
        }
+
        FILE *f = popen(buf, "r");
-       if(f == NULL) {
+       if (f == NULL) {
                fprintf(stderr, "invoking preprocessor failed\n");
                exit(1);
        }
+
+       /* we don't really need that anymore */
+       obstack_free(&cppflags_obst, buf);
+
        return f;
 }
 
-static void do_link(const char *out, const char *in)
+static void assemble(const char *out, const char *in)
 {
-       char buf[4096];
-       obstack_1grow(&ldflags_obst, '\0');
-       const char *flags = obstack_finish(&ldflags_obst);
+       char buf[65536];
 
-       snprintf(buf, sizeof(buf), LINKER " %s -o %s %s", flags, out, in);
-       if(verbose) {
+       snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
+       if (verbose) {
                puts(buf);
        }
+
        int err = system(buf);
-       if(err != 0) {
-               fprintf(stderr, "linker reported an error\n");
+       if (err != 0) {
+               fprintf(stderr, "assembler reported an error\n");
                exit(1);
        }
 }
 
-static void assemble(const char *out, const char *in)
+static void print_file_name(const char *file)
 {
-       char buf[4096];
+       add_flag(&ldflags_obst, "-print-file-name=%s", file);
 
-       snprintf(buf, sizeof(buf), "%s %s -o %s", ASSEMBLER, in, out);
-       if(verbose) {
-               puts(buf);
-       }
+       obstack_1grow(&ldflags_obst, '\0');
+       const char *flags = obstack_finish(&ldflags_obst);
 
-       int err = system(buf);
-       if(err != 0) {
-               fprintf(stderr, "assembler reported an error\n");
+       /* construct commandline */
+       obstack_printf(&ldflags_obst, "%s ", LINKER);
+       obstack_printf(&ldflags_obst, "%s", flags);
+       obstack_1grow(&ldflags_obst, '\0');
+
+       char *commandline = obstack_finish(&ldflags_obst);
+
+       if (verbose) {
+               puts(commandline);
+       }
+       int err = system(commandline);
+       if (err != EXIT_SUCCESS) {
+               fprintf(stderr, "linker reported an error\n");
                exit(1);
        }
 }
 
 static const char *try_dir(const char *dir)
 {
-       if(dir == NULL)
+       if (dir == NULL)
                return dir;
-       if(access(dir, R_OK | W_OK | X_OK) == 0)
+       if (access(dir, R_OK | W_OK | X_OK) == 0)
                return dir;
        return NULL;
 }
@@ -254,29 +435,29 @@ static const char *get_tempdir(void)
 {
        static const char *tmpdir = NULL;
 
-       if(tmpdir != NULL)
+       if (tmpdir != NULL)
                return tmpdir;
 
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir(getenv("TMPDIR"));
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir(getenv("TMP"));
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir(getenv("TEMP"));
 
 #ifdef P_tmpdir
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir(P_tmpdir);
 #endif
 
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir("/var/tmp");
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir("/usr/tmp");
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = try_dir("/tmp");
 
-       if(tmpdir == NULL)
+       if (tmpdir == NULL)
                tmpdir = ".";
 
        return tmpdir;
@@ -292,35 +473,55 @@ static int mkstemp(char *templ)
 #endif
 
 /**
- * an own version of tmpnam, which: writes in a buffer, appends a user specified
- * suffix, emits no warnings during linking (like glibc/gnu ld do for tmpnam)...
+ * an own version of tmpnam, which: writes in a buffer, emits no warnings
+ * during linking (like glibc/gnu ld do for tmpnam)...
  */
-static FILE *make_temp_file(char *buffer, size_t buflen,
-                            const char *prefix, const char *suffix)
+static FILE *make_temp_file(char *buffer, size_t buflen, const char *prefix)
 {
        const char *tempdir = get_tempdir();
 
-       /* oh well... mkstemp doesn't accept a suffix after XXXXXX... */
-       (void) suffix;
-       suffix = "";
-
-       snprintf(buffer, buflen, "%s/%sXXXXXX%s", tempdir, prefix, suffix);
+       snprintf(buffer, buflen, "%s/%sXXXXXX", tempdir, prefix);
 
        int fd = mkstemp(buffer);
-       if(fd == -1) {
+       if (fd == -1) {
                fprintf(stderr, "couldn't create temporary file: %s\n",
                        strerror(errno));
                exit(1);
        }
        FILE *out = fdopen(fd, "w");
-       if(out == NULL) {
+       if (out == NULL) {
                fprintf(stderr, "couldn't create temporary file FILE*\n");
                exit(1);
        }
 
+       file_list_entry_t *entry = xmalloc(sizeof(*entry));
+       memset(entry, 0, sizeof(*entry));
+
+       size_t  name_len = strlen(buffer) + 1;
+       char   *name     = malloc(name_len);
+       memcpy(name, buffer, name_len);
+       entry->name      = name;
+
+       entry->next = temp_files;
+       temp_files  = entry;
+
        return out;
 }
 
+static void free_temp_files(void)
+{
+       file_list_entry_t *entry = temp_files;
+       file_list_entry_t *next;
+       for ( ; entry != NULL; entry = next) {
+               next = entry->next;
+
+               unlink(entry->name);
+               free((char*) entry->name);
+               free(entry);
+       }
+       temp_files = NULL;
+}
+
 /**
  * Do the necessary lowering for compound parameters.
  */
@@ -338,14 +539,18 @@ void lower_compound_params(void)
 
 typedef enum compile_mode_t {
        BenchmarkParser,
+       PreprocessOnly,
        ParseOnly,
        Compile,
        CompileDump,
+       CompileExportIR,
        CompileAssemble,
        CompileAssembleLink,
        LexTest,
        PrintAst,
-       PrintFluffy
+       PrintFluffy,
+       PrintCaml,
+       PrintJna
 } compile_mode_t;
 
 static void usage(const char *argv0)
@@ -353,31 +558,157 @@ static void usage(const char *argv0)
        fprintf(stderr, "Usage %s input [-o output] [-c]\n", argv0);
 }
 
+static void print_cparser_version(void)
+{
+       printf("cparser (%s) using libFirm (%u.%u",
+              cparser_REVISION, ir_get_version_major(),
+              ir_get_version_minor());
+
+       const char *revision = ir_get_version_revision();
+       if (revision[0] != 0) {
+               putchar(' ');
+               fputs(revision, stdout);
+       }
+
+       const char *build = ir_get_version_build();
+       if (build[0] != 0) {
+               putchar(' ');
+               fputs(build, stdout);
+       }
+       puts(")");
+       puts("This is free software; see the source for copying conditions.  There is NO\n"
+            "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
+}
+
+static void set_be_option(const char *arg)
+{
+       int res = firm_be_option(arg);
+       (void) res;
+       assert(res);
+}
+
+static void set_option(const char *arg)
+{
+       int res = firm_option(arg);
+       (void) res;
+       assert(res);
+}
+
+static void copy_file(FILE *dest, FILE *input)
+{
+       char buf[16384];
+
+       while (!feof(input) && !ferror(dest)) {
+               size_t read = fread(buf, 1, sizeof(buf), input);
+               if (fwrite(buf, 1, read, dest) != read) {
+                       perror("couldn't write output");
+               }
+       }
+}
+
+static inline bool streq(char const* a, char const* b)
+{
+       return strcmp(a, b) == 0;
+}
+
+static inline bool strstart(char const* str, char const* start)
+{
+       do {
+               if (*start == '\0')
+                       return true;
+       } while (*str++ == *start++);
+       return false;
+}
+
+static FILE *open_file(const char *filename)
+{
+       if (streq(filename, "-")) {
+               return stdin;
+       }
+
+       FILE *in = fopen(filename, "r");
+       if (in == NULL) {
+               fprintf(stderr, "Couldn't open '%s': %s\n", filename,
+                               strerror(errno));
+               exit(1);
+       }
+
+       return in;
+}
+
+static filetype_t get_filetype_from_string(const char *string)
+{
+       if (streq(string, "c") || streq(string, "c-header"))
+               return FILETYPE_C;
+       if (streq(string, "c++") || streq(string, "c++-header"))
+               return FILETYPE_CXX;
+       if (streq(string, "assembler"))
+               return FILETYPE_PREPROCESSED_ASSEMBLER;
+       if (streq(string, "assembler-with-cpp"))
+               return FILETYPE_ASSEMBLER;
+       if (streq(string, "none"))
+               return FILETYPE_AUTODETECT;
+
+       return FILETYPE_UNKNOWN;
+}
+
+static void init_os_support(void)
+{
+       /* OS option must be set to the backend */
+       switch (firm_opt.os_support) {
+       case OS_SUPPORT_MINGW:
+               set_be_option("ia32-gasmode=mingw");
+               wchar_atomic_kind = ATOMIC_TYPE_USHORT;
+               break;
+       case OS_SUPPORT_LINUX:
+               set_be_option("ia32-gasmode=elf");
+               break;
+       case OS_SUPPORT_MACHO:
+               set_be_option("ia32-gasmode=macho");
+               set_be_option("ia32-stackalign=4");
+               set_be_option("pic");
+               break;
+       }
+}
+
 int main(int argc, char **argv)
 {
        initialize_firm();
 
-       const char     *input        = NULL;
-       const char     *outname      = NULL;
-       const char     *dumpfunction = NULL;
-       compile_mode_t  mode         = CompileAssembleLink;
-       int             opt_level    = 1;
-       int             result       = EXIT_SUCCESS;
+       const char        *dumpfunction         = NULL;
+       const char        *print_file_name_file = NULL;
+       compile_mode_t     mode                 = CompileAssembleLink;
+       int                opt_level            = 1;
+       int                result               = EXIT_SUCCESS;
+       char               cpu_arch[16]         = "ia32";
+       file_list_entry_t *files                = NULL;
+       file_list_entry_t *last_file            = NULL;
+       bool               construct_dep_target = false;
+       struct obstack     file_obst;
+
+       atexit(free_temp_files);
+
+       /* hack for now... */
+       if (strstr(argv[0], "pptest") != NULL) {
+               extern int pptest_main(int argc, char **argv);
+               return pptest_main(argc, argv);
+       }
 
        obstack_init(&cppflags_obst);
        obstack_init(&ldflags_obst);
+       obstack_init(&file_obst);
 
 #define GET_ARG_AFTER(def, args)                                             \
        def = &arg[sizeof(args)-1];                                              \
-       if(def[0] == '\0') {                                                     \
+       if (def[0] == '\0') {                                                     \
                ++i;                                                                 \
-               if(i >= argc) {                                                      \
+               if (i >= argc) {                                                      \
                        fprintf(stderr, "error: expected argument after '" args "'\n");  \
                        argument_errors = true;                                          \
                        break;                                                           \
                }                                                                    \
                def = argv[i];                                                       \
-               if(def[0] == '-' && def[1] != '\0') {                                \
+               if (def[0] == '-' && def[1] != '\0') {                                \
                        fprintf(stderr, "error: expected argument after '" args "'\n");  \
                        argument_errors = true;                                          \
                        continue;                                                        \
@@ -386,107 +717,204 @@ int main(int argc, char **argv)
 
 #define SINGLE_OPTION(ch) (option[0] == (ch) && option[1] == '\0')
 
-       /* early options parsing (find out optimisation level) */
-       for(int i = 1; i < argc; ++i) {
+       /* early options parsing (find out optimisation level and OS) */
+       for (int i = 1; i < argc; ++i) {
                const char *arg = argv[i];
-               if(arg[0] != '-')
+               if (arg[0] != '-')
                        continue;
 
                const char *option = &arg[1];
-               if(option[0] == 'O') {
+               if (option[0] == 'O') {
                        sscanf(&option[1], "%d", &opt_level);
                }
+               if (strcmp(arg, "-fwin32") == 0) {
+                       firm_opt.os_support = OS_SUPPORT_MINGW;
+               } else if (strcmp(arg, "-fmac") == 0) {
+                       firm_opt.os_support = OS_SUPPORT_MACHO;
+               } else if (strcmp(arg, "-flinux") == 0) {
+                       firm_opt.os_support = OS_SUPPORT_LINUX;
+               }
        }
 
+       /* set target/os specific stuff */
+       init_os_support();
+
        /* apply optimisation level */
        switch(opt_level) {
        case 0:
-               firm_option("no-opt");
+               set_option("no-opt");
                break;
        case 1:
-               firm_option("no-inline");
+               set_option("no-inline");
                break;
        default:
        case 4:
-               firm_option("strict-aliasing");
+               /* use_builtins = true; */
                /* fallthrough */
        case 3:
-               firm_option("cond-eval");
-               firm_option("if-conv");
+               set_option("jumpthreading");
+               set_option("if-conv");
                /* fallthrough */
        case 2:
-               firm_option("inline");
-               firm_option("deconv");
-               firm_be_option("omitfp");
+               set_option("strict-aliasing");
+               set_option("inline");
+               set_option("deconv");
+               set_be_option("omitfp");
                break;
        }
 
        /* parse rest of options */
-       bool help_displayed  = false;
-       bool argument_errors = false;
-       for(int i = 1; i < argc; ++i) {
+       standard                        = STANDARD_DEFAULT;
+       unsigned        features_on     = 0;
+       unsigned        features_off    = 0;
+       filetype_t      forced_filetype = FILETYPE_AUTODETECT;
+       bool            help_displayed  = false;
+       bool            argument_errors = false;
+       for (int i = 1; i < argc; ++i) {
                const char *arg = argv[i];
-               if(arg[0] == '-') {
+               if (arg[0] == '-' && arg[1] != '\0') {
                        /* an option */
                        const char *option = &arg[1];
-                       if(option[0] == 'o') {
+                       if (option[0] == 'o') {
                                GET_ARG_AFTER(outname, "-o");
-                       } else if(option[0] == 'g') {
-                               firm_be_option("stabs=yes");
-                               firm_be_option("omitfp=no");
-                               firm_be_option("ia32-nooptcc=yes");
-                       } else if(SINGLE_OPTION('c')) {
+                       } else if (option[0] == 'g') {
+                               set_be_option("debuginfo=stabs");
+                               set_be_option("omitfp=no");
+                               set_be_option("ia32-nooptcc=yes");
+                       } else if (SINGLE_OPTION('c')) {
                                mode = CompileAssemble;
-                       } else if(SINGLE_OPTION('S')) {
+                       } else if (SINGLE_OPTION('E')) {
+                               mode = PreprocessOnly;
+                       } else if (SINGLE_OPTION('S')) {
                                mode = Compile;
-                       } else if(option[0] == 'O') {
+                       } else if (option[0] == 'O') {
                                continue;
-                       } else if(option[0] == 'I') {
+                       } else if (option[0] == 'I') {
                                const char *opt;
                                GET_ARG_AFTER(opt, "-I");
-                               obstack_printf(&cppflags_obst, " -I%s", opt);
-                       } else if(option[0] == 'D') {
+                               add_flag(&cppflags_obst, "-I%s", opt);
+                       } else if (option[0] == 'D') {
                                const char *opt;
                                GET_ARG_AFTER(opt, "-D");
-                               obstack_printf(&cppflags_obst, " -D%s", opt);
-                       } else if(option[0] == 'U') {
+                               add_flag(&cppflags_obst, "-D%s", opt);
+                       } else if (option[0] == 'U') {
                                const char *opt;
                                GET_ARG_AFTER(opt, "-U");
-                               obstack_printf(&cppflags_obst, " -U%s", opt);
-                       } else if(option[0] == 'l') {
+                               add_flag(&cppflags_obst, "-U%s", opt);
+                       } else if (option[0] == 'l') {
                                const char *opt;
                                GET_ARG_AFTER(opt, "-l");
-                               obstack_printf(&ldflags_obst, " -l%s", opt);
-                       } else if(option[0] == 'L') {
+                               add_flag(&ldflags_obst, "-l%s", opt);
+                       } else if (option[0] == 'L') {
                                const char *opt;
                                GET_ARG_AFTER(opt, "-L");
-                               obstack_printf(&ldflags_obst, " -L%s", opt);
-                       } else if(SINGLE_OPTION('v')) {
+                               add_flag(&ldflags_obst, "-L%s", opt);
+                       } else if (SINGLE_OPTION('v')) {
                                verbose = 1;
-                       } else if(SINGLE_OPTION('w')) {
-                               inhibit_all_warnings = true;
-                       } else if(option[0] == 'f') {
+                       } else if (SINGLE_OPTION('w')) {
+                               memset(&warning, 0, sizeof(warning));
+                       } else if (option[0] == 'x') {
+                               const char *opt;
+                               GET_ARG_AFTER(opt, "-x");
+                               forced_filetype = get_filetype_from_string(opt);
+                               if (forced_filetype == FILETYPE_UNKNOWN) {
+                                       fprintf(stderr, "Unknown language '%s'\n", opt);
+                                       argument_errors = true;
+                               }
+                       } else if (streq(option, "M")) {
+                               mode = PreprocessOnly;
+                               add_flag(&cppflags_obst, "-M");
+                       } else if (streq(option, "MMD") ||
+                                  streq(option, "MD")) {
+                           construct_dep_target = true;
+                               add_flag(&cppflags_obst, "-%s", option);
+                       } else if (streq(option, "MM")  ||
+                                  streq(option, "MP")) {
+                               add_flag(&cppflags_obst, "-%s", option);
+                       } else if (streq(option, "MT") ||
+                                  streq(option, "MQ") ||
+                                  streq(option, "MF")) {
+                               const char *opt;
+                               GET_ARG_AFTER(opt, "-MT");
+                               add_flag(&cppflags_obst, "-%s", option);
+                               add_flag(&cppflags_obst, "%s", opt);
+                       } else if (streq(option, "include")) {
+                               const char *opt;
+                               GET_ARG_AFTER(opt, "-include");
+                               add_flag(&cppflags_obst, "-include");
+                               add_flag(&cppflags_obst, "%s", opt);
+                       } else if (streq(option, "isystem")) {
                                const char *opt;
-                               GET_ARG_AFTER(opt, "-f");
-
-                               if(strcmp(opt, "syntax-only") == 0) {
-                                       mode = ParseOnly;
-                               } else if(strcmp(opt, "omit-frame-pointer") == 0) {
-                                       firm_be_option("omitfp");
-                               } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
-                                       firm_be_option("omitfp=no");
+                               GET_ARG_AFTER(opt, "-isystem");
+                               add_flag(&cppflags_obst, "-isystem");
+                               add_flag(&cppflags_obst, "%s", opt);
+                       } else if (streq(option, "nostdinc")
+                                       || streq(option, "trigraphs")) {
+                               /* pass these through to the preprocessor */
+                               add_flag(&cppflags_obst, "%s", arg);
+                       } else if (streq(option, "pipe")) {
+                               /* here for gcc compatibility */
+                       } else if (option[0] == 'f') {
+                               char const *orig_opt;
+                               GET_ARG_AFTER(orig_opt, "-f");
+
+                               if (strstart(orig_opt, "align-loops=") ||
+                                   strstart(orig_opt, "align-jumps=") ||
+                                   strstart(orig_opt, "align-functions=")) {
+                                       fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
+                               } else if (strstart(orig_opt, "input-charset=")) {
+                                       char const* const encoding = strchr(orig_opt, '=') + 1;
+                                       select_input_encoding(encoding);
+                               } else if (streq(orig_opt, "verbose-asm")) {
+                                       /* ignore: we always print verbose assembler */
                                } else {
-                                       int res = firm_option(opt);
-                                       if (res == 0) {
-                                               fprintf(stderr, "error: unknown Firm option '-f %s'\n",
-                                                       opt);
-                                               argument_errors = true;
-                                               continue;
-                                       } else if (res == -1) {
-                                               help_displayed = true;
+                                       char const *opt         = orig_opt;
+                                       bool        truth_value = true;
+                                       if (opt[0] == 'n' && opt[1] == 'o' && opt[2] == '-') {
+                                               truth_value = false;
+                                               opt += 3;
+                                       }
+
+                                       if (streq(opt, "builtins")) {
+                                               use_builtins = truth_value;
+                                       } else if (streq(opt, "dollars-in-identifiers")) {
+                                               allow_dollar_in_symbol = truth_value;
+                                       } else if (streq(opt, "omit-frame-pointer")) {
+                                               set_be_option(truth_value ? "omitfp" : "omitfp=no");
+                                       } else if (streq(opt, "short-wchar")) {
+                                               wchar_atomic_kind = truth_value ? ATOMIC_TYPE_USHORT
+                                                       : ATOMIC_TYPE_INT;
+                                       } else if (streq(opt, "signed-char")) {
+                                               char_is_signed = truth_value;
+                                       } else if (streq(opt, "strength-reduce")) {
+                                               firm_option(truth_value ? "strength-red" : "no-strength-red");
+                                       } else if (streq(opt, "syntax-only")) {
+                                               mode = truth_value ? ParseOnly : CompileAssembleLink;
+                                       } else if (streq(opt, "unsigned-char")) {
+                                               char_is_signed = !truth_value;
+                                       } else if (streq(opt, "fast-math")               ||
+                                                  streq(opt, "jump-tables")             ||
+                                                  streq(opt, "unroll-loops")            ||
+                                                  streq(opt, "expensive-optimizations") ||
+                                                  streq(opt, "common")                  ||
+                                                  streq(opt, "PIC")                     ||
+                                                  streq(opt, "align-loops")             ||
+                                                  streq(opt, "align-jumps")             ||
+                                                  streq(opt, "align-functions")) {
+                                               fprintf(stderr, "ignoring gcc option '-f%s'\n", orig_opt);
+                                       } else {
+                                               int res = firm_option(orig_opt);
+                                               if (res == 0) {
+                                                       fprintf(stderr, "error: unknown Firm option '-f%s'\n",
+                                                               orig_opt);
+                                                       argument_errors = true;
+                                                       continue;
+                                               } else if (res == -1) {
+                                                       help_displayed = true;
+                                               }
                                        }
                                }
-                       } else if(option[0] == 'b') {
+                       } else if (option[0] == 'b') {
                                const char *opt;
                                GET_ARG_AFTER(opt, "-b");
                                int res = firm_be_option(opt);
@@ -496,94 +924,166 @@ int main(int argc, char **argv)
                                        argument_errors = true;
                                } else if (res == -1) {
                                        help_displayed = true;
+                               } else if (strstart(opt, "isa=")) {
+                                       strncpy(cpu_arch, opt, sizeof(cpu_arch));
                                }
-                       } else if(option[0] == 'W') {
-                               set_warning_opt(&option[1]);
-                       } else if(option[0] == 'm') {
-                               const char *opt;
-                               GET_ARG_AFTER(opt, "-m");
-                               char *endptr;
-                               long int value = strtol(opt, &endptr, 10);
-                               if (*endptr != '\0') {
-                                       fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
-                                       argument_errors = true;
-                               }
-                               if (value != 16 && value != 32 && value != 64) {
-                                       fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
-                                       argument_errors = true;
+                       } else if (option[0] == 'W') {
+                               if (strstart(option + 1, "p,")) {
+                                       // pass options directly to the preprocessor
+                                       const char *opt;
+                                       GET_ARG_AFTER(opt, "-Wp,");
+                                       add_flag(&cppflags_obst, "-Wp,%s", opt);
+                               } else if (strstart(option + 1, "l,")) {
+                                       // pass options directly to the linker
+                                       const char *opt;
+                                       GET_ARG_AFTER(opt, "-Wl,");
+                                       add_flag(&ldflags_obst, "-Wl,%s", opt);
+                               } else if (streq(option + 1, "no-trigraphs")
+                                                       || streq(option + 1, "undef")) {
+                                       add_flag(&cppflags_obst, "%s", arg);
                                } else {
-                                       machine_size = (unsigned int)value;
+                                       set_warning_opt(&option[1]);
                                }
-                       } else if (option[0] == '\0') {
-                               if(input != NULL) {
-                                       fprintf(stderr, "error: multiple input files specified\n");
-                                       argument_errors = true;
+                       } else if (option[0] == 'm') {
+                               /* -m options */
+                               const char *opt;
+                               char arch_opt[64];
+
+                               GET_ARG_AFTER(opt, "-m");
+                               if (strstart(opt, "arch=")) {
+                                       GET_ARG_AFTER(opt, "-march=");
+                                       snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
+                                       int res = firm_be_option(arch_opt);
+                                       if (res == 0)
+                                               argument_errors = true;
+                                       else {
+                                               snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
+                                               int res = firm_be_option(arch_opt);
+                                               if (res == 0)
+                                                       argument_errors = true;
+                                       }
+                               } else if (strstart(opt, "tune=")) {
+                                       GET_ARG_AFTER(opt, "-mtune=");
+                                       snprintf(arch_opt, sizeof(arch_opt), "%s-opt=%s", cpu_arch, opt);
+                                       int res = firm_be_option(arch_opt);
+                                       if (res == 0)
+                                               argument_errors = true;
+                               } else if (strstart(opt, "cpu=")) {
+                                       GET_ARG_AFTER(opt, "-mcpu=");
+                                       snprintf(arch_opt, sizeof(arch_opt), "%s-arch=%s", cpu_arch, opt);
+                                       int res = firm_be_option(arch_opt);
+                                       if (res == 0)
+                                               argument_errors = true;
+                               } else if (strstart(opt, "fpmath=")) {
+                                       GET_ARG_AFTER(opt, "-mfpmath=");
+                                       if (streq(opt, "387"))
+                                               opt = "x87";
+                                       else if (streq(opt, "sse"))
+                                               opt = "sse2";
+                                       else {
+                                               fprintf(stderr, "error: option -mfpumath supports only 387 or sse\n");
+                                               argument_errors = true;
+                                       }
+                                       if (!argument_errors) {
+                                               snprintf(arch_opt, sizeof(arch_opt), "%s-fpunit=%s", cpu_arch, opt);
+                                               int res = firm_be_option(arch_opt);
+                                               if (res == 0)
+                                                       argument_errors = true;
+                                       }
+                               } else if (strstart(opt, "preferred-stack-boundary=")) {
+                                       GET_ARG_AFTER(opt, "-mpreferred-stack-boundary=");
+                                       snprintf(arch_opt, sizeof(arch_opt), "%s-stackalign=%s", cpu_arch, opt);
+                                       int res = firm_be_option(arch_opt);
+                                       if (res == 0)
+                                               argument_errors = true;
+                               } else if (streq(opt, "omit-leaf-frame-pointer")) {
+                                       set_be_option("omitleaffp=1");
+                               } else if (streq(opt, "no-omit-leaf-frame-pointer")) {
+                                       set_be_option("omitleaffp=0");
+                               } else if (streq(opt, "rtd")) {
+                                       default_calling_convention = CC_STDCALL;
                                } else {
-                                       input = arg;
+                                       char *endptr;
+                                       long int value = strtol(opt, &endptr, 10);
+                                       if (*endptr != '\0') {
+                                               fprintf(stderr, "error: wrong option '-m %s'\n",  opt);
+                                               argument_errors = true;
+                                       }
+                                       if (value != 16 && value != 32 && value != 64) {
+                                               fprintf(stderr, "error: option -m supports only 16, 32 or 64\n");
+                                               argument_errors = true;
+                                       } else {
+                                               machine_size = (unsigned int)value;
+                                       }
                                }
-                       } else if(strcmp(option, "pg") == 0) {
-                               firm_be_option("-b gprof");
-                               obstack_printf(&ldflags_obst, " -pg");
-                       } else if(strcmp(option, "pedantic") == 0) {
+                       } else if (streq(option, "pg")) {
+                               set_be_option("gprof");
+                               add_flag(&ldflags_obst, "-pg");
+                       } else if (streq(option, "pedantic") ||
+                                  streq(option, "ansi")) {
                                fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
-                       } else if(strncmp(option, "std=", 4) == 0) {
-                               if(strcmp(&option[4], "c99") == 0) {
-                                       c_mode = _C89|_C99;
-                               } else if(strcmp(&option[4], "c89") == 0) {
-                                       c_mode = _C89;
-                               } else if(strcmp(&option[4], "gnu99") == 0) {
-                                       c_mode = _C89|_C99|_GNUC;
-                               } else if(strcmp(&option[4], "microsoft") == 0) {
-                                       c_mode = _C89|_C99|_MS;
-                               } else
-                                       fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg);
+                       } else if (streq(option, "shared")) {
+                               add_flag(&ldflags_obst, "-shared");
+                       } else if (strstart(option, "std=")) {
+                               const char *const o = &option[4];
+                               standard =
+                                       streq(o, "c++")            ? STANDARD_CXX98   :
+                                       streq(o, "c++98")          ? STANDARD_CXX98   :
+                                       streq(o, "c89")            ? STANDARD_C89     :
+                                       streq(o, "c99")            ? STANDARD_C99     :
+                                       streq(o, "c9x")            ? STANDARD_C99     : // deprecated
+                                       streq(o, "gnu++98")        ? STANDARD_GNUXX98 :
+                                       streq(o, "gnu89")          ? STANDARD_GNU89   :
+                                       streq(o, "gnu99")          ? STANDARD_GNU99   :
+                                       streq(o, "gnu9x")          ? STANDARD_GNU99   : // deprecated
+                                       streq(o, "iso9899:1990")   ? STANDARD_C89     :
+                                       streq(o, "iso9899:199409") ? STANDARD_C90     :
+                                       streq(o, "iso9899:1999")   ? STANDARD_C99     :
+                                       streq(o, "iso9899:199x")   ? STANDARD_C99     : // deprecated
+                                       (fprintf(stderr, "warning: ignoring gcc option '%s'\n", arg), standard);
+                       } else if (streq(option, "version")) {
+                               print_cparser_version();
+                       } else if (strstart(option, "print-file-name=")) {
+                               GET_ARG_AFTER(print_file_name_file, "-print-file-name=");
                        } else if (option[0] == '-') {
                                /* double dash option */
                                ++option;
-                               if(strcmp(option, "gcc") == 0) {
-                                       c_mode |= _GNUC;
-                               } else if(strcmp(option, "no-gcc") == 0) {
-                                       c_mode &= ~_GNUC;
-                               } else if(strcmp(option, "ms") == 0) {
-                                       c_mode |= _MS;
-                               } else if(strcmp(option, "no-ms") == 0) {
-                                       c_mode &= ~_MS;
-                               } else if(strcmp(option, "signed-chars") == 0) {
-                                       char_is_signed = true;
-                               } else if(strcmp(option, "unsigned-chars") == 0) {
-                                       char_is_signed = false;
-                               } else if(strcmp(option, "strict") == 0) {
+                               if (streq(option, "gcc")) {
+                                       features_on  |=  _GNUC;
+                                       features_off &= ~_GNUC;
+                               } else if (streq(option, "no-gcc")) {
+                                       features_on  &= ~_GNUC;
+                                       features_off |=  _GNUC;
+                               } else if (streq(option, "ms")) {
+                                       features_on  |=  _MS;
+                                       features_off &= ~_MS;
+                               } else if (streq(option, "no-ms")) {
+                                       features_on  &= ~_MS;
+                                       features_off |=  _MS;
+                               } else if (streq(option, "strict")) {
                                        strict_mode = true;
-                               } else if(strcmp(option, "lextest") == 0) {
+                               } else if (streq(option, "lextest")) {
                                        mode = LexTest;
-                               } else if(strcmp(option, "benchmark") == 0) {
+                               } else if (streq(option, "benchmark")) {
                                        mode = BenchmarkParser;
-                               } else if(strcmp(option, "print-ast") == 0) {
+                               } else if (streq(option, "print-ast")) {
                                        mode = PrintAst;
-                               } else if(strcmp(option, "print-implicit-cast") == 0) {
+                               } else if (streq(option, "print-implicit-cast")) {
                                        print_implicit_casts = true;
-                               } else if(strcmp(option, "print-parenthesis") == 0) {
+                               } else if (streq(option, "print-parenthesis")) {
                                        print_parenthesis = true;
-                               } else if(strcmp(option, "print-fluffy") == 0) {
+                               } else if (streq(option, "print-fluffy")) {
                                        mode = PrintFluffy;
-                               } else if(strcmp(option, "version") == 0) {
-                                       firm_version_t ver;
-                                       firm_get_version(&ver);
-                                       printf("cparser (%s) using libFirm (%u.%u",
-                                              cparser_REVISION, ver.major, ver.minor);
-                                       if(ver.revision[0] != 0) {
-                                               putchar(' ');
-                                               fputs(ver.revision, stdout);
-                                       }
-                                       if(ver.build[0] != 0) {
-                                               putchar(' ');
-                                               fputs(ver.build, stdout);
-                                       }
-                                       puts(")\n");
+                               } else if (streq(option, "print-caml")) {
+                                       mode = PrintCaml;
+                               } else if (streq(option, "print-jna")) {
+                                       mode = PrintJna;
+                               } else if (streq(option, "version")) {
+                                       print_cparser_version();
                                        exit(EXIT_SUCCESS);
-                               } else if(strcmp(option, "dump-function") == 0) {
+                               } else if (streq(option, "dump-function")) {
                                        ++i;
-                                       if(i >= argc) {
+                                       if (i >= argc) {
                                                fprintf(stderr, "error: "
                                                        "expected argument after '--dump-function'\n");
                                                argument_errors = true;
@@ -591,6 +1091,8 @@ int main(int argc, char **argv)
                                        }
                                        dumpfunction = argv[i];
                                        mode         = CompileDump;
+                               } else if (streq(option, "export-ir")) {
+                                       mode = CompileExportIR;
                                } else {
                                        fprintf(stderr, "error: unknown argument '%s'\n", arg);
                                        argument_errors = true;
@@ -600,29 +1102,80 @@ int main(int argc, char **argv)
                                argument_errors = true;
                        }
                } else {
-                       if(input != NULL) {
-                               fprintf(stderr, "error: multiple input files specified\n");
-                               argument_errors = true;
+                       filetype_t type = forced_filetype;
+                       if (type == FILETYPE_AUTODETECT) {
+                               if (streq(arg, "-")) {
+                                       /* - implicitly means C source file */
+                                       type = FILETYPE_C;
+                               } else {
+                                       const char *suffix = strrchr(arg, '.');
+                                       /* Ensure there is at least one char before the suffix */
+                                       if (suffix != NULL && suffix != arg) {
+                                               ++suffix;
+                                               type =
+                                                       streq(suffix, "S")   ? FILETYPE_ASSEMBLER              :
+                                                       streq(suffix, "a")   ? FILETYPE_OBJECT                 :
+                                                       streq(suffix, "c")   ? FILETYPE_C                      :
+                                                       streq(suffix, "cc")  ? FILETYPE_CXX                    :
+                                                       streq(suffix, "cpp") ? FILETYPE_CXX                    :
+                                                       streq(suffix, "cxx") ? FILETYPE_CXX                    :
+                                                       streq(suffix, "h")   ? FILETYPE_C                      :
+                                                       streq(suffix, "ir")  ? FILETYPE_IR                     :
+                                                       streq(suffix, "o")   ? FILETYPE_OBJECT                 :
+                                                       streq(suffix, "s")   ? FILETYPE_PREPROCESSED_ASSEMBLER :
+                                                       streq(suffix, "so")  ? FILETYPE_OBJECT                 :
+                                                       FILETYPE_AUTODETECT;
+                                       }
+                               }
+
+                               if (type == FILETYPE_AUTODETECT) {
+                                       fprintf(stderr, "'%s': file format not recognized\n", arg);
+                                       continue;
+                               }
+                       }
+
+                       file_list_entry_t *entry
+                               = obstack_alloc(&file_obst, sizeof(entry[0]));
+                       memset(entry, 0, sizeof(entry[0]));
+                       entry->name = arg;
+                       entry->type = type;
+
+                       if (last_file != NULL) {
+                               last_file->next = entry;
                        } else {
-                               input = arg;
+                               files = entry;
                        }
+                       last_file = entry;
                }
        }
 
-       /* we do the lowering in ast2firm */
-       firm_opt.lower_bitfields = FALSE;
+       if (print_file_name_file != NULL) {
+               print_file_name(print_file_name_file);
+               return 0;
+       }
 
-       if(help_displayed) {
+       if (files == NULL) {
+               fprintf(stderr, "error: no input files specified\n");
+               argument_errors = true;
+       }
+
+       if (help_displayed) {
                return !argument_errors;
        }
-       if(argument_errors) {
+       if (argument_errors) {
                usage(argv[0]);
                return 1;
        }
 
+       /* we do the lowering in ast2firm */
+       firm_opt.lower_bitfields = FALSE;
+
+       /* set the c_mode here, types depends on it */
+       c_mode |= features_on;
+       c_mode &= ~features_off;
+
        gen_firm_init();
        init_symbol_table();
-       init_tokens();
        init_types();
        init_typehash();
        init_basic_types();
@@ -630,26 +1183,39 @@ int main(int argc, char **argv)
        init_ast();
        init_parser();
        init_ast2firm();
+       init_mangle();
+
+       if (construct_dep_target) {
+               if (outname != 0 && strlen(outname) >= 2) {
+                       get_output_name(dep_target, sizeof(dep_target), outname, ".d");
+               } else {
+                       get_output_name(dep_target, sizeof(dep_target), files->name, ".d");
+               }
+       } else {
+               dep_target[0] = '\0';
+       }
+
+       char outnamebuf[4096];
+       if (outname == NULL) {
+               const char *filename = files->name;
 
-       FILE *out = NULL;
-       char  outnamebuf[4096];
-       if(outname == NULL) {
                switch(mode) {
                case BenchmarkParser:
                case PrintAst:
                case PrintFluffy:
+               case PrintCaml:
+               case PrintJna:
                case LexTest:
-                       if(outname == NULL)
-                               outname = "-";
-                       break;
+               case PreprocessOnly:
                case ParseOnly:
+                       outname = "-";
                        break;
                case Compile:
-                       get_output_name(outnamebuf, sizeof(outnamebuf), input, ".s");
+                       get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".s");
                        outname = outnamebuf;
                        break;
                case CompileAssemble:
-                       get_output_name(outnamebuf, sizeof(outnamebuf), input, ".o");
+                       get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".o");
                        outname = outnamebuf;
                        break;
                case CompileDump:
@@ -657,12 +1223,13 @@ int main(int argc, char **argv)
                                        ".vcg");
                        outname = outnamebuf;
                        break;
+               case CompileExportIR:
+                       get_output_name(outnamebuf, sizeof(outnamebuf), filename, ".ir");
+                       outname = outnamebuf;
+                       break;
                case CompileAssembleLink:
 #ifdef _WIN32
-                       /* Windows compiler typically derive the output name from
-                          the first source file */
-                       get_output_name(outnamebuf, sizeof(outnamebuf), input, ".exe");
-                       outname = outnamebuf;
+                       outname = "a.exe";
 #else
                        outname = "a.out";
 #endif
@@ -670,147 +1237,313 @@ int main(int argc, char **argv)
                }
        }
 
-       if(outname != NULL) {
-               if(strcmp(outname, "-") == 0) {
-                       out = stdout;
-               } else {
-                       out = fopen(outname, "w");
-                       if(out == NULL) {
-                               fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
-                                       strerror(errno));
-                               return 1;
-                       }
-               }
-       }
+       assert(outname != NULL);
 
-       FILE *in;
-       if(input == NULL) {
-               fprintf(stderr, "%s: no input files\n", argv[0]);
-               return 1;
-       } else if(strcmp(input, "-") == 0) {
-               in    = stdin;
-               input = "<stdin>";
+       FILE *out;
+       if (streq(outname, "-")) {
+               out = stdout;
        } else {
-               in = fopen(input, "r");
-               if(in == NULL) {
-                       fprintf(stderr, "Couldn't open '%s': %s\n", input, strerror(errno));
+               out = fopen(outname, "w");
+               if (out == NULL) {
+                       fprintf(stderr, "Couldn't open '%s' for writing: %s\n", outname,
+                                       strerror(errno));
                        return 1;
                }
        }
 
-       if(mode == LexTest) {
-               lextest(in, input);
-               fclose(in);
-               return 0;
-       }
+       file_list_entry_t *file;
+       for (file = files; file != NULL; file = file->next) {
+               char        asm_tempfile[1024];
+               const char *filename = file->name;
+               filetype_t  filetype = file->type;
 
-       FILE *preprocessed_in = preprocess(in, input);
-       translation_unit_t *const unit = do_parsing(preprocessed_in, input);
-       int res = pclose(preprocessed_in);
-       if(res != 0) {
-               return res;
-       }
+               if (filetype == FILETYPE_OBJECT)
+                       continue;
 
-       if(error_count > 0) {
-               /* parsing failed because of errors */
-               fprintf(stderr, "%u error(s), %u warning(s)\n", error_count, warning_count);
-               result = EXIT_FAILURE;
-       } else if(warning_count > 0) {
-               fprintf(stderr, "%u warning(s)\n", warning_count);
-       }
+               FILE *in = NULL;
+               if (mode == LexTest) {
+                       if (in == NULL)
+                               in = open_file(filename);
+                       lextest(in, filename);
+                       fclose(in);
+                       exit(EXIT_SUCCESS);
+               }
 
-       if(mode == BenchmarkParser) {
-               return result;
-       }
+               FILE *preprocessed_in = NULL;
+               filetype_t next_filetype = filetype;
+               switch (filetype) {
+                       case FILETYPE_C:
+                               next_filetype = FILETYPE_PREPROCESSED_C;
+                               goto preprocess;
+                       case FILETYPE_CXX:
+                               next_filetype = FILETYPE_PREPROCESSED_CXX;
+                               goto preprocess;
+                       case FILETYPE_ASSEMBLER:
+                               next_filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
+                               goto preprocess;
+preprocess:
+                               /* no support for input on FILE* yet */
+                               if (in != NULL)
+                                       panic("internal compiler error: in for preprocessor != NULL");
+
+                               preprocessed_in = preprocess(filename, filetype);
+                               if (mode == PreprocessOnly) {
+                                       copy_file(out, preprocessed_in);
+                                       int result = pclose(preprocessed_in);
+                                       fclose(out);
+                                       /* remove output file in case of error */
+                                       if (out != stdout && result != EXIT_SUCCESS) {
+                                               unlink(outname);
+                                       }
+                                       return result;
+                               }
 
-       /* prints the AST even if errors occurred */
-       if(mode == PrintAst) {
-               type_set_output(out);
-               ast_set_output(out);
-               print_ast(unit);
-               return result;
-       }
+                               in = preprocessed_in;
+                               filetype = next_filetype;
+                               break;
 
-       /* cannot handle other modes with errors */
-       if(result != EXIT_SUCCESS)
-               return result;
+                       default:
+                               break;
+               }
 
-       if(mode == PrintFluffy) {
-               type_set_output(out);
-               ast_set_output(out);
-               write_fluffy_decls(out, unit);
-       }
+               FILE *asm_out;
+               if (mode == Compile) {
+                       asm_out = out;
+               } else {
+                       asm_out = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "ccs");
+               }
 
-       translation_unit_to_firm(unit);
+               if (in == NULL)
+                       in = open_file(filename);
+
+               /* preprocess and compile */
+               if (filetype == FILETYPE_PREPROCESSED_C) {
+                       char const* invalid_mode;
+                       switch (standard) {
+                               case STANDARD_ANSI:
+                               case STANDARD_C89:   c_mode = _C89;                break;
+                               /* TODO determine difference between these two */
+                               case STANDARD_C90:   c_mode = _C89;                break;
+                               case STANDARD_C99:   c_mode = _C89 | _C99;         break;
+                               case STANDARD_GNU89: c_mode = _C89 |        _GNUC; break;
+
+default_c_warn:
+                                       fprintf(stderr,
+                                                       "warning: command line option \"-std=%s\" is not valid for C\n",
+                                                       invalid_mode);
+                                       /* FALLTHROUGH */
+                               case STANDARD_DEFAULT:
+                               case STANDARD_GNU99:   c_mode = _C89 | _C99 | _GNUC; break;
+
+                               case STANDARD_CXX98:   invalid_mode = "c++98"; goto default_c_warn;
+                               case STANDARD_GNUXX98: invalid_mode = "gnu98"; goto default_c_warn;
+                       }
+                       goto do_parsing;
+               } else if (filetype == FILETYPE_PREPROCESSED_CXX) {
+                       char const* invalid_mode;
+                       switch (standard) {
+                               case STANDARD_C89:   invalid_mode = "c89";   goto default_cxx_warn;
+                               case STANDARD_C90:   invalid_mode = "c90";   goto default_cxx_warn;
+                               case STANDARD_C99:   invalid_mode = "c99";   goto default_cxx_warn;
+                               case STANDARD_GNU89: invalid_mode = "gnu89"; goto default_cxx_warn;
+                               case STANDARD_GNU99: invalid_mode = "gnu99"; goto default_cxx_warn;
+
+                               case STANDARD_ANSI:
+                               case STANDARD_CXX98: c_mode = _CXX; break;
+
+default_cxx_warn:
+                                       fprintf(stderr,
+                                                       "warning: command line option \"-std=%s\" is not valid for C++\n",
+                                                       invalid_mode);
+                               case STANDARD_DEFAULT:
+                               case STANDARD_GNUXX98: c_mode = _CXX | _GNUC; break;
+                       }
 
-       if(mode == ParseOnly) {
-               return 0;
-       }
+do_parsing:
+                       c_mode |= features_on;
+                       c_mode &= ~features_off;
 
-       FILE *asm_out;
-       char  asm_tempfile[1024];
-       if(mode == CompileDump) {
-               asm_out = NULL;
-               firm_be_opt.selection = BE_NONE;
-       } else if(mode == Compile) {
-               asm_out = out;
-       } else {
-               asm_out
-                       = make_temp_file(asm_tempfile, sizeof(asm_tempfile), "cc", ".s");
-       }
-       gen_firm_finish(asm_out, input, /*c_mode=*/1, /*firm_const_exists=*/0);
-
-       if(mode == CompileDump) {
-               /* find irg */
-               ident    *id     = new_id_from_str(dumpfunction);
-               ir_graph *irg    = NULL;
-               int       n_irgs = get_irp_n_irgs();
-               for(int i = 0; i < n_irgs; ++i) {
-                       ir_graph *tirg   = get_irp_irg(i);
-                       ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
-                       if(irg_id == id) {
-                               irg = tirg;
-                               break;
+                       init_tokens();
+                       translation_unit_t *const unit = do_parsing(in, filename);
+
+                       /* prints the AST even if errors occurred */
+                       if (mode == PrintAst) {
+                               type_set_output(out);
+                               ast_set_output(out);
+                               print_ast(unit);
+                       }
+
+                       if (error_count > 0) {
+                               /* parsing failed because of errors */
+                               fprintf(stderr, "%u error(s), %u warning(s)\n", error_count,
+                                       warning_count);
+                               result = EXIT_FAILURE;
+                               continue;
+                       } else if (warning_count > 0) {
+                               fprintf(stderr, "%u warning(s)\n", warning_count);
+                       }
+
+                       if (in == preprocessed_in) {
+                               int pp_result = pclose(preprocessed_in);
+                               if (pp_result != EXIT_SUCCESS) {
+                                       /* remove output file */
+                                       if (out != stdout)
+                                               unlink(outname);
+                                       exit(EXIT_FAILURE);
+                               }
+                       }
+
+                       if (mode == BenchmarkParser) {
+                               return result;
+                       } else if (mode == PrintFluffy) {
+                               write_fluffy_decls(out, unit);
+                               continue;
+                       } else if (mode == PrintCaml) {
+                               write_caml_decls(out, unit);
+                               continue;
+                       } else if (mode == PrintJna) {
+                               write_jna_decls(out, unit);
+                               continue;
+                       }
+
+                       translation_unit_to_firm(unit);
+
+graph_built:
+                       if (mode == ParseOnly) {
+                               continue;
+                       }
+
+                       if (mode == CompileDump) {
+                               /* find irg */
+                               ident    *id     = new_id_from_str(dumpfunction);
+                               ir_graph *irg    = NULL;
+                               int       n_irgs = get_irp_n_irgs();
+                               for (int i = 0; i < n_irgs; ++i) {
+                                       ir_graph *tirg   = get_irp_irg(i);
+                                       ident    *irg_id = get_entity_ident(get_irg_entity(tirg));
+                                       if (irg_id == id) {
+                                               irg = tirg;
+                                               break;
+                                       }
+                               }
+
+                               if (irg == NULL) {
+                                       fprintf(stderr, "No graph for function '%s' found\n",
+                                               dumpfunction);
+                                       exit(1);
+                               }
+
+                               dump_ir_block_graph_file(irg, out);
+                               fclose(out);
+                               exit(0);
+                       }
+
+                       if (mode == CompileExportIR) {
+                               fclose(out);
+                               ir_export(outname);
+                               exit(0);
+                       }
+
+                       gen_firm_finish(asm_out, filename, /*c_mode=*/1,
+                                       have_const_functions);
+                       if (asm_out != out) {
+                               fclose(asm_out);
+                       }
+               } else if (filetype == FILETYPE_IR) {
+                       fclose(in);
+                       ir_import(filename);
+                       goto graph_built;
+               } else if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
+                       copy_file(asm_out, in);
+                       if (in == preprocessed_in) {
+                               int pp_result = pclose(preprocessed_in);
+                               if (pp_result != EXIT_SUCCESS) {
+                                       /* remove output in error case */
+                                       if (out != stdout)
+                                               unlink(outname);
+                                       return pp_result;
+                               }
+                       }
+                       if (asm_out != out) {
+                               fclose(asm_out);
                        }
                }
 
-               if(irg == NULL) {
-                       fprintf(stderr, "No graph for function '%s' found\n", dumpfunction);
-                       return 1;
+               if (mode == Compile)
+                       continue;
+
+               /* if we're here then we have preprocessed assembly */
+               filename = asm_tempfile;
+               filetype = FILETYPE_PREPROCESSED_ASSEMBLER;
+
+               /* assemble */
+               if (filetype == FILETYPE_PREPROCESSED_ASSEMBLER) {
+                       char        temp[1024];
+                       const char *filename_o;
+                       if (mode == CompileAssemble) {
+                               fclose(out);
+                               filename_o = outname;
+                       } else {
+                               FILE *tempf = make_temp_file(temp, sizeof(temp), "cco");
+                               fclose(tempf);
+                               filename_o = temp;
+                       }
+
+                       assemble(filename_o, filename);
+
+                       size_t len = strlen(filename_o) + 1;
+                       filename = obstack_copy(&file_obst, filename_o, len);
+                       filetype = FILETYPE_OBJECT;
                }
 
-               dump_ir_block_graph_file(irg, out);
-               fclose(out);
-               return 0;
+               /* ok we're done here, process next file */
+               file->name = filename;
+               file->type = filetype;
+       }
+
+       if (result != EXIT_SUCCESS) {
+               if (out != stdout)
+                       unlink(outname);
+               return result;
        }
 
-       fclose(asm_out);
+       /* link program file */
+       if (mode == CompileAssembleLink) {
+               obstack_1grow(&ldflags_obst, '\0');
+               const char *flags = obstack_finish(&ldflags_obst);
 
-       /* assemble assembler and create object file */
-       char obj_tfile[1024];
-       if(mode == CompileAssemble || mode == CompileAssembleLink) {
-               const char *obj_outfile;
-               if(mode == CompileAssemble) {
-                       fclose(out);
-                       obj_outfile = outname;
-               } else {
-                       FILE *tempf
-                               = make_temp_file(obj_tfile, sizeof(obj_tfile), "cc", ".o");
-                       fclose(tempf);
-                       obj_outfile = obj_tfile;
+               /* construct commandline */
+               obstack_printf(&file_obst, "%s", LINKER);
+               for (file_list_entry_t *entry = files; entry != NULL;
+                               entry = entry->next) {
+                       if (entry->type != FILETYPE_OBJECT)
+                               continue;
+
+                       add_flag(&file_obst, "%s", entry->name);
                }
 
-               assemble(obj_outfile, asm_tempfile);
-       }
+               add_flag(&file_obst, "-o");
+               add_flag(&file_obst, outname);
+               obstack_printf(&file_obst, "%s", flags);
+               obstack_1grow(&file_obst, '\0');
+
+               char *commandline = obstack_finish(&file_obst);
 
-       /* link object file */
-       if(mode == CompileAssembleLink) {
-               do_link(outname, obj_tfile);
+               if (verbose) {
+                       puts(commandline);
+               }
+               int err = system(commandline);
+               if (err != EXIT_SUCCESS) {
+                       fprintf(stderr, "linker reported an error\n");
+                       exit(1);
+               }
        }
 
        obstack_free(&cppflags_obst, NULL);
        obstack_free(&ldflags_obst, NULL);
+       obstack_free(&file_obst, NULL);
 
+       exit_mangle();
        exit_ast2firm();
        exit_parser();
        exit_ast();