Hi, I want to use a non-standard function like memrchr(). So I added: AC_REPLACE_FUNCS(memrchr) in configure.ac, and to prevent warnings, add #ifndef HAVE_MEMRCHR extern void *memrchr(const void *, int, size_t); #endif in a header file. Now, I was able to compile it on platforms which have no memrchr() function in libc. But on Linux (glibc), I got a warning like this: warning: implicit declaration of function `memrchr' because the memrchr() declaration in string.h is protected by #ifdef __USE_GNU. How can I handle this situation properly? I want to avoid unconditionally defining _GNU_SOURCE because its side effects are unpredictable. Regards, -- Yonenaga Masao _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx http://lists.gnu.org/mailman/listinfo/autoconf
