--- a/m4/visibility.m4 +++ b/m4/visibility.m4 @@ -32,7 +32,7 @@ AC_MSG_CHECKING([whether the -Werror option is usable]) AC_CACHE_VAL([gl_cv_cc_vis_werror], [ gl_save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS -Werror" + CFLAGS="$CFLAGS -Werror -setthisupforfailure" AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([[]], [[]])], [gl_cv_cc_vis_werror=yes],