From ac07122c1a7601100e15c982ff938d5632d9e7a0 Mon Sep 17 00:00:00 2001
From: MarcoFalke <falke.marco@gmail.com>
Date: Tue, 1 Jun 2021 10:29:47 +0200
Subject: [PATCH] build: Add --with-append-cxxflags option

Github-Pull: #22159
Rebased-From: fa14c6818f4094669584a110a517fa1347f1f36e
---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index 1e6ac93e78..9c1184929e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -220,6 +220,11 @@ AC_ARG_ENABLE([reduce-exports],
   [use_reduce_exports=$enableval],
   [use_reduce_exports=no])
 
+AC_ARG_WITH([append-cxxflags],
+  [AS_HELP_STRING([--with-append-cxxflags],
+  [append given cxxflags without checking them (default is empty string)])],
+  [append_cxxflags=$withval])
+
 AC_ARG_ENABLE([ccache],
   [AS_HELP_STRING([--disable-ccache],
   [do not use ccache for building (default is to use if found)])],
@@ -1497,6 +1502,8 @@ if test "$use_reduce_exports" = "yes"; then
   AX_CHECK_LINK_FLAG([-Wl,--exclude-libs,ALL], [RELDFLAGS="-Wl,--exclude-libs,ALL"], [], [$LDFLAG_WERROR])
 fi
 
+CXXFLAGS="$CXXFLAGS $append_cxxflags"
+
 if test "$use_tests" = "yes"; then
 
   if test "$HEXDUMP" = ""; then