Correct do_include().

Do not alter headername, which is needed unaltered later on.

diff --git a/preprocessor.c b/preprocessor.c
index 4d0bddd..da87e9d 100644 (file)
--- a/preprocessor.c
+++ b/preprocessor.c
@@ -1757,24 +1757,27 @@ finish_error:
        pp_token.literal.string       = string;
 }
 
-static bool do_include(bool system_include, const char *headername)
+static bool do_include(bool system_include, char const *const headername)
 {
        size_t headername_len = strlen(headername);
        if (!system_include) {
                /* put dirname of current input on obstack */
                const char *filename   = input.position.input_name;
                const char *last_slash = strrchr(filename, '/');
+               const char *full_name;
                if (last_slash != NULL) {
                        size_t len = last_slash - filename;
                        obstack_grow(&symbol_obstack, filename, len + 1);
                        obstack_grow0(&symbol_obstack, headername, headername_len);
                        char *complete_path = obstack_finish(&symbol_obstack);
-                       headername = identify_string(complete_path);
+                       full_name = identify_string(complete_path);
+               } else {
+                       full_name = headername;
                }
 
-               FILE *file = fopen(headername, "r");
+               FILE *file = fopen(full_name, "r");
                if (file != NULL) {
-                       switch_pp_input(file, headername);
+                       switch_pp_input(file, full_name);
                        return true;
                }
        }