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| author | Marcel Raad <raad@teamviewer.com> | 2017-04-14 12:48:27 +0200 |
|---|---|---|
| committer | Marcel Raad <raad@teamviewer.com> | 2017-04-15 21:17:56 +0200 |
| commit | 9168e2470d5203661faa5500361b7eb493aa24dd (patch) | |
| tree | dc87ff09ad9ddab8918ade5c8ee385b072976a08 /m4 | |
| parent | e50e2850ba273259081722946ea9bd84bcaa6709 (diff) | |
| download | curl-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.m4 | 7 |
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) |