http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39456
--- Comment #4 from etienne_lorrain at yahoo dot fr 2012-01-03 09:53:59 UTC --- Thanks for looking at my reports and happy new year! I think the problem I had was the quoting and string concat, you need: void fct2 (void) __attribute__((__section__("sect1_fct2"))) { return; } The solution you give generates: void fct1 (void) __attribute__((__section__(basesectfct1))) { return; } You cannot give the compiler: void fct2 (void) __attribute__((__section__("sect1_" "fct2"))) { return; } because it would not concat the strings in this case (I did not re-check). And: #define function_def(base_section, funname, RET, ARGS) \ RET funname ARGS __attribute__((__section__(# base_section##funname))) #define basesect sect1_ function_def(basesect, fct1, void, (void)) { return; } will stringify #base_section before applying the ## That was my problem...