From 730c2d3cd98280694b32b80d0cb0f138dcf37638 Mon Sep 17 00:00:00 2001
From: Peter Veenstra <qbix79@users.sourceforge.net>
Date: Fri, 27 Jun 2014 09:02:08 +0000
Subject: [PATCH] Run with -mno-ms-bitfields if the compiler supports it as the
 ms-bitfields are turned on by default on some hosts, but they are broken
 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52991

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3869
---
 configure.ac | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/configure.ac b/configure.ac
index a683bfda..8cf01bdf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -169,6 +169,21 @@ int x=10;if( __builtin_expect ((x==1),0) ) ;
 #switch language back
 AC_LANG_POP(C++)
 
+dnl test if compiler supports -mno-ms-bitfields as it is bugged 
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52991
+BACKUP_CFLAGS="$CFLAGS"
+CFLAGS="-mno-ms-bitfields"
+AC_MSG_CHECKING(if compiler supports -mno-ms-bitfields)
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+void blah(){
+;
+}
+])],[
+AC_MSG_RESULT([yes])
+CXXFLAGS="$CXXFLAGS -mno-ms-bitfields"
+],[AC_MSG_RESULT([no])])
+CFLAGS="$BACKUP_CFLAGS"
+
 dnl enable disable alsa and pass it's cflags to CXXFLAGS
 AC_ARG_ENABLE(alsa-midi,
 AC_HELP_STRING([--enable-alsa-midi],[compile with alsa midi support (default yes)]),