m4/dovecot.m4: Use -Wno-default-const-init-field-unsafe if it exists

This causes unnecessary warnings about buffer_t.

diff --git a/m4/dovecot.m4 b/m4/dovecot.m4
index 25d922ccab3e9eeccdec373117f76a07ce9dedc5..3e1aadf004d5b9453fe88575470791c818005b5b 100644 (file)
--- a/m4/dovecot.m4
+++ b/m4/dovecot.m4
@@ -521,6 +521,9 @@ AC_DEFUN([CC_CLANG],[
   AC_MSG_CHECKING([whether $CC is clang 3.3+])
   AS_IF([$CC -dM -E -x c /dev/null | $GREP __clang__ > /dev/null 2>&1], [
       AS_VAR_SET([have_clang], [yes])
+      # buffer_t usage triggers this warning
+      gl_WARN_ADD([-Wno-default-const-init-field-unsafe])
+      AM_CFLAGS="$AM_CFLAGS $WARN_CFLAGS"
   ], [
       AS_VAR_SET([have_clang], [no])
   ])