Unverified Commit 9168e247 authored by Marcel Raad's avatar Marcel Raad
Browse files

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
3072c5b8.

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
parent e50e2850

m4/curl-compilers.m4

+5 −2
Original line number Diff line number Diff line
@@ -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)