From 66fdd8f1de2c135f3f2a90af01597a2d8223c6e4 Mon Sep 17 00:00:00 2001
From: Peter Veenstra <qbix79@users.sourceforge.net>
Date: Tue, 21 Aug 2018 11:57:32 +0000
Subject: [PATCH] add a bit of hack to make building a 32 bit binary for Apple
 a bit easier

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4138
---
 configure.ac | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/configure.ac b/configure.ac
index 230114eb..09591039 100644
--- a/configure.ac
+++ b/configure.ac
@@ -302,6 +302,36 @@ case "$host_cpu" in
     ;;
 esac
 
+dnl check for size of pointer being 4 
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+#if SIZEOF_INT_P != 4
+#error size intp is not 4, this not something to worry about
+#endif
+void blah() {
+;
+}
+])],[c_sizep=4],[c_sizep=0])
+
+
+dnl automake 1.14 and upwards rewrite the host to have always 64 bit unless i386 as host is passed
+dnl this can make building a 32 bit executable a bit tricky, as dosbox relies on the host to select the
+dnl dynamic/dynrec core
+AC_MSG_CHECKING([whether Apple user wants to override the build process to produce a 32 bit binary])
+case "$host" in 
+  *-*-darwin*)
+   if test x$c_targetcpu = xx86_64 -a x$c_sizep = x4 ; then
+     AC_MSG_RESULT(yes)
+     AC_DEFINE(C_TARGETCPU,X86)
+     c_targetcpu="x86"
+   else
+     AC_MSG_RESULT(no)
+   fi
+   ;;
+  *)
+   AC_MSG_RESULT([no, not on Apple])
+   ;;
+esac
+
 AC_ARG_ENABLE(dynamic-core,AC_HELP_STRING([--disable-dynamic-core],[Disable all dynamic cores]),,enable_dynamic_core=yes)
 
 AH_TEMPLATE(C_DYNAMIC_X86,[Define to 1 to use x86 dynamic cpu core])