From: Matthew Flatt <mflatt@racket-lang.org>
Date: Thu, 27 Dec 2012 21:57:26 +0000 (-0600)
Subject: MinGW-w64 support
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5a341f4b5d10bfffb612362061621165a361f7ae;p=gc

MinGW-w64 support

For now, SGC must be used, but `configure' does not select it
automatically.

Also, support Cygwin (in addition to MSYS) as a build environment
when using MinGW compilers. Since I build in a Cygwin environment
(which seemed to be the easiest way to get MinGW-w64 gcc), I use

  ../configure --host=x86_64-w64-mingw32 --enable-sgc
---

diff --git a/include/private/gcconfig.h b/include/private/gcconfig.h
index 5d8ab05f..d2a85c7b 100644
--- a/include/private/gcconfig.h
+++ b/include/private/gcconfig.h
@@ -433,7 +433,7 @@
 #   define CYGWIN32
 #   define mach_type_known
 # endif
-# if defined(__MINGW32__)
+# if defined(__MINGW32__) && !defined(_WIN64) /* PLTSCHEME: no _WIN64 */
 #   define I386
 #   define MSWIN32
 #   define mach_type_known