build: Add --with-append-cxxflags option

MarcoFalke · MarcoFalke · commit fa14c6818f40 · 2021-07-07T12:10:53.000+02:00
diff --git a/configure.ac b/configure.ac
@@ -212,6 +212,11 @@ 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=$withval])
+
 AC_ARG_ENABLE([ccache],
   [AS_HELP_STRING([--disable-ccache],
   [do not use ccache for building (default is to use if found)])],
@@ -1428,6 +1433,8 @@ if test x$use_reduce_exports = xyes; then
   AX_CHECK_LINK_FLAG([[-Wl,--exclude-libs,ALL]],[RELDFLAGS="-Wl,--exclude-libs,ALL"],,[[$LDFLAG_WERROR]])
 fi
 
+CXXFLAGS="$CXXFLAGS $append_cxxflags"
+
 if test x$use_tests = xyes; then
 
   if test x$HEXDUMP = x; then
