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-rw-r--r--m4/curl-compilers.m47
1 files changed, 5 insertions, 2 deletions
diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 3219baf6b..19462582f 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -577,8 +577,11 @@ AC_DEFUN([CURL_SET_COMPILER_BASIC_OPTS], [
#
GNU_C)
#
- dnl Placeholder
- tmp_CFLAGS="$tmp_CFLAGS"
+ dnl turn implicit-function-declaration warning into error,
+ dnl at least gcc 2.95 and later support this
+ if test "$compiler_num" -ge "295"; then
+ tmp_CFLAGS="$tmp_CFLAGS -Werror-implicit-function-declaration"
+ fi
;;
#
HP_UX_C)