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diff src/libsndfile-1.0.27/M4/add_cxxflags.m4 @ 40:1df64224f5ac

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Current libsndfile source
author Chris Cannam
date Tue, 18 Oct 2016 13:22:47 +0100
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/libsndfile-1.0.27/M4/add_cxxflags.m4	Tue Oct 18 13:22:47 2016 +0100
@@ -0,0 +1,19 @@
+dnl @synopsis MN_ADD_CXXFLAGS
+dnl
+dnl Add the given option to CXXFLAGS, if it doesn't break the compiler
+
+AC_DEFUN([MN_ADD_CXXFLAGS],
+[AC_MSG_CHECKING([if $CXX accepts $1])
+	AC_LANG_ASSERT([C++])
+	ac_add_cxxflags__old_cxxflags="$CXXFLAGS"
+	CXXFLAGS="$1"
+	AC_TRY_LINK([
+			#include <cstdio>
+			],
+		[puts("Hello, World!"); return 0;],
+		AC_MSG_RESULT([yes])
+			CXXFLAGS="$ac_add_cxxflags__old_cxxflags $1",
+		AC_MSG_RESULT([no])
+			CXXFLAGS="$ac_add_cxxflags__old_cxxflags"
+		)
+])# MN_ADD_CXXFLAGS