hi, I am facing a problem while building gcc. I only changed value of INT_TYPE_SIZE defined in file gcc-3.4.1\gcc\config\i386\i386.h to 16, specifying that int size is 16 bits instead of 32 bits, When i ran make , it didn't build and gave errors. This was the only change i made. Please tell me how i can specify int size to be 16 bits rather than 32 bits. regex.c: At top level: regex.c:8178: warning: unused parameter 'preg' regex.c: In function `byte_re_match_2_internal': regex.c:7576: error: unrecognizable insn: (insn:HI 2861 6401 2862 228 regex.c:7833 (parallel [ (set (reg:SI 1211 [ mcnt ]) (zero_extend:DI (subreg:HI (reg/v:SI 71 [ mcnt ]) 0))) (clobber (reg:CC 17 flags)) ]) -1 (nil) (expr_list:REG_UNUSED (reg:CC 17 flags) (nil))) regex.c:7576: internal compiler error: in extract_insn, at recog.c:2083 Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. make[1]: *** [regex.o] Error 1 make[1]: Leaving directory `/cygdrive/e/gcc/gcc-3.4.1/i686-pc-cygwin/libiberty' make: *** [all-target-libiberty] Error 2 With regards, -ashok