+ if(arg[0] != '-')
+ continue;
+
+ const char *option = &arg[1];
+ if(option[0] == 'O') {
+ sscanf(&option[1], "%d", &opt_level);
+ }
+ }
+
+ /* apply optimisation level */
+ switch(opt_level) {
+ case 0:
+ set_option("no-opt");
+ break;
+ case 1:
+ set_option("no-inline");
+ break;
+ default:
+ case 4:
+ set_option("strict-aliasing");
+ /* fallthrough */
+ case 3:
+ set_option("cond-eval");
+ set_option("if-conv");
+ use_builtins = true;
+ /* fallthrough */
+ case 2:
+ 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) {
+ const char *arg = argv[i];
+ if(arg[0] == '-' && arg[1] != 0) {
+ /* an option */
+ const char *option = &arg[1];
+ if(option[0] == 'o') {
+ GET_ARG_AFTER(outname, "-o");
+ } 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('E')) {
+ mode = PreprocessOnly;
+ } else if(SINGLE_OPTION('S')) {
+ mode = Compile;
+ } else if(option[0] == 'O') {
+ continue;
+ } else if(option[0] == 'I') {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-I");
+ add_flag(&cppflags_obst, "-I%s", opt);
+ } else if(option[0] == 'D') {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-D");
+ add_flag(&cppflags_obst, "-D%s", opt);
+ } else if(option[0] == 'U') {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-U");
+ add_flag(&cppflags_obst, "-U%s", opt);
+ } else if(option[0] == 'l') {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-l");
+ add_flag(&ldflags_obst, "-l%s", opt);
+ } else if(option[0] == 'L') {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-L");
+ 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(strcmp(option, "M") == 0) {
+ mode = PreprocessOnly;
+ add_flag(&cppflags_obst, "-M");
+ } else if(strcmp(option, "MMD") == 0
+ || strcmp(option, "MD") == 0
+ || strcmp(option, "MM") == 0) {
+ add_flag(&cppflags_obst, "-%s", option);
+ } else if(strcmp(option, "MT") == 0
+ || strcmp(option, "MQ") == 0
+ || strcmp(option, "MF") == 0) {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-MT");
+ add_flag(&cppflags_obst, "-%s", option);
+ add_flag(&cppflags_obst, "%s", opt);
+ } else if(strcmp(option, "pipe") == 0) {
+ /* here for gcc compatibility */
+ } else if(option[0] == 'f') {
+ const char *opt;
+ GET_ARG_AFTER(opt, "-f");
+
+ if(strcmp(opt, "syntax-only") == 0) {
+ mode = ParseOnly;
+ } else if(strcmp(opt, "omit-frame-pointer") == 0) {
+ set_be_option("omitfp");
+ } else if(strcmp(opt, "no-omit-frame-pointer") == 0) {
+ set_be_option("omitfp=no");
+ } else if(strcmp(opt, "strength-reduce") == 0) {
+ firm_option("strength-red");
+ } else if(strcmp(opt, "fast-math") == 0
+ || strcmp(opt, "unroll-loops") == 0
+ || strcmp(opt, "expensive-optimizations") == 0
+ || strcmp(opt, "no-common") == 0
+ || strncmp(opt, "align-loops=", sizeof("align-loops=")-1) == 0
+ || strncmp(opt, "align-jumps=", sizeof("align-jumps=")-1) == 0
+ || strncmp(opt, "align-functions=", sizeof("align-functions=")-1) == 0) {
+ fprintf(stderr, "ignoring gcc option '-f %s'\n", opt);
+ } 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;
+ }