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authorMarcel Raad <raad@teamviewer.com>2017-04-14 12:48:27 +0200
committerMarcel Raad <raad@teamviewer.com>2017-04-15 21:17:56 +0200
commit9168e2470d5203661faa5500361b7eb493aa24dd (patch)
treedc87ff09ad9ddab8918ade5c8ee385b072976a08 /m4
parente50e2850ba273259081722946ea9bd84bcaa6709 (diff)
downloadcurl-9168e2470d5203661faa5500361b7eb493aa24dd.tar.gz
curl-compilers.m4: turn implicit function declarations into errors
This adds -Werror-implicit-function-declaration for GCC 2.95+ so that these errors are visible at the point where they occur instead of only at link time. Implicit function declarations are illegal in C99 and C++ anyway, and the same warning has been turned into an error for ICC in commit 3072c5b8a127057aa922b7c51051bbb4a630b091. Ref: https://gcc.gnu.org/onlinedocs/gcc-2.95.2/gcc_2.html#SEC8 Ref: https://curl.haxx.se/mail/lib-2017-04/0001.html Closes https://github.com/curl/curl/pull/1419
Diffstat (limited to 'm4')
-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)