https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79623
--- Comment #5 from Sumit <sbansal at ciena dot com> --- Below error log indicates that the C standard library headers are found in /usr/include. Isn't? In file included from /usr/include/stdlib.h:314:0, from ../../gcc-4.8/libiberty/regex.c:130: /usr/include/sys/types.h:98:17: error: two or more data types in declaration specifiers typedef __pid_t pid_t;