curl-compilers.m4: for gcc + want warnings, set gnu89 standard

To better verify that the code is C89 Closes #9542
2022-09-20 10:56:44 +02:00 · 2022-09-20 10:56:44 +02:00 · b23ce2cee7
commit b23ce2cee7
parent 549032df41
1 changed files with 1 additions and 0 deletions
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@ -860,6 +860,7 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
      GNU_C)
        #
        if test "$want_warnings" = "yes"; then
+          tmp_CFLAGS="$tmp_CFLAGS -std=gnu89"
          #
          dnl Do not enable -pedantic when cross-compiling with a gcc older
          dnl than 3.0, to avoid warnings from third party system headers.