1dnl @synopsis XIPH_ADD_CFLAGS 2dnl 3dnl Add the given option to CFLAGS, if it doesn't break the compiler 4 5AC_DEFUN([XIPH_ADD_CFLAGS], 6[AC_MSG_CHECKING([if $CC accepts $1]) 7 ac_add_cflags__old_cflags="$CFLAGS" 8 CFLAGS="$1" 9 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ 10 #include <stdio.h> 11 ]], [[puts("Hello, World!"); return 0;]])],[AC_MSG_RESULT(yes) 12 CFLAGS="$ac_add_cflags__old_cflags $1"],[AC_MSG_RESULT(no) 13 CFLAGS="$ac_add_cflags__old_cflags" 14 ]) 15])# XIPH_ADD_CFLAGS 16