Hello, When below code is compiled with -MF option the Compilation failed when the path of Windows is more than 256 characters. Do let me know if it is a feature or a bug in GCC. Test code in a.c: int main() { int a = 100; int b = 200; return a+b; } Compilation: gcc -M -MF E:\ppc\issue\workspace\test1\test2\test3\test4\test5\test6\test7\test8\test9 \test10\test11\test12\test13\test14\test15\test16\test17\test18\test19\test2 0\test21\test22\test23\test24\test25\test26\test27\test28\test29\test30\test 31\test32\test33\test34\test35\test36\test37\test38\test39\test40\test41\tes t42\test43\a.d -c a.c Error: fatal error: opening dependency file E:\ppc\issue\workspace\test1\test2\test3\test4\test5\test6\test7\test8\test9 \test10\test11\test12\test13\test14\test15\test16\test17\test18\test19\test2 0\test21\test22\test23\test24\test25\test26\test27\test28\test29\test30\test 31\test32\test33\test34\test35\test36\test37\test38\test39\test40\test41\tes t42\test43\a.d: No such file or directory compilation terminated.