From: Otto Moerbeek <otto.moerbeek@open-xchange.com>
Date: Wed, 14 Sep 2022 12:42:30 +0000 (+0200)
Subject: Don't use c++17 features
X-Git-Tag: dnsdist-1.8.0-rc1~211^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=13e499591adc03b0fd8fdad0f83a018b61ece03a;p=thirdparty%2Fpdns.git

Don't use c++17 features
---

diff --git a/m4/ax_check_sign.m4 b/m4/ax_check_sign.m4
index a6b5e57785..d01258e851 100644
--- a/m4/ax_check_sign.m4
+++ b/m4/ax_check_sign.m4
@@ -43,7 +43,7 @@ AC_DEFUN([AX_CHECK_SIGN], [
  AC_CACHE_CHECK([whether $1 is signed], ax_cv_decl_${typename}_signed, [
    AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM([[$4]],
-       [[ [[maybe_unused]] int foo @<:@ 1 - 2 * !((($1) -1) < 0) @:>@ ]])],
+       [[ int foo @<:@ 1 - 2 * !((($1) -1) < 0) @:>@ ; (void)foo[0] ]])],
      [ eval "ax_cv_decl_${typename}_signed=\"yes\"" ],
      [ eval "ax_cv_decl_${typename}_signed=\"no\"" ])
  ])