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[Emacs-diffs] trunk r117951: Don't use USE_STACK_LISP_OBJECTS on Windows


From: Eli Zaretskii
Subject: [Emacs-diffs] trunk r117951: Don't use USE_STACK_LISP_OBJECTS on Windows with GCC older than 4.2.
Date: Thu, 25 Sep 2014 17:49:40 +0000
User-agent: Bazaar (2.6b2)

------------------------------------------------------------
revno: 117951
revision-id: address@hidden
parent: address@hidden
fixes bug: http://debbugs.gnu.org/18559
committer: Eli Zaretskii <address@hidden>
branch nick: trunk
timestamp: Thu 2014-09-25 20:49:02 +0300
message:
  Don't use USE_STACK_LISP_OBJECTS on Windows with GCC older than 4.2.
  
   src/lisp.h (USE_STACK_LISP_OBJECTS): Default to false for 32-bit
   MinGW builds that use GCC before 4.2.
modified:
  src/ChangeLog                  changelog-20091113204419-o5vbwnq5f7feedwu-1438
  src/lisp.h                     lisp.h-20091113204419-o5vbwnq5f7feedwu-253
=== modified file 'src/ChangeLog'
--- a/src/ChangeLog     2014-09-25 09:34:53 +0000
+++ b/src/ChangeLog     2014-09-25 17:49:02 +0000
@@ -1,5 +1,8 @@
 2014-09-25  Eli Zaretskii  <address@hidden>
 
+       * lisp.h (USE_STACK_LISP_OBJECTS): Default to false for 32-bit
+       MinGW builds that use GCC before 4.2.
+
        Default to stack objects on DOS_NT platforms as well.
        * w32term.h (ALIGN_STACK) [__GNUC__]: Define to
        __attribute__((force_align_arg_pointer)) for GCC 4.2 and later.

=== modified file 'src/lisp.h'
--- a/src/lisp.h        2014-09-25 10:24:57 +0000
+++ b/src/lisp.h        2014-09-25 17:49:02 +0000
@@ -286,7 +286,13 @@
    http://lists.gnu.org/archive/html/emacs-devel/2014-09/msg00506.html.  */
 #ifndef USE_STACK_LISP_OBJECTS
 # if defined __GNUC__ && !defined __clang__
-#  define USE_STACK_LISP_OBJECTS true
+   /* 32-bit MinGW builds need at least GCC 4.2 to support this.  */
+#  if defined __MINGW32__ && !defined _W64     \
+      && __GNUC__ + (__GNUC_MINOR__ > 1) < 5
+#   define USE_STACK_LISP_OBJECTS false
+#  else         /* !(__MINGW32__ && __GNUC__ < 4.2) */
+#   define USE_STACK_LISP_OBJECTS true
+#  endif
 # else
 #  define USE_STACK_LISP_OBJECTS false
 # endif


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