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[Emacs-diffs] trunk r117935: * lisp.h (USE_STACK_LISP_OBJECTS): Enable b
From: |
Dmitry Antipov |
Subject: |
[Emacs-diffs] trunk r117935: * lisp.h (USE_STACK_LISP_OBJECTS): Enable by default if GNU_LINUX |
Date: |
Wed, 24 Sep 2014 11:59:32 +0000 |
User-agent: |
Bazaar (2.6b2) |
------------------------------------------------------------
revno: 117935
revision-id: address@hidden
parent: address@hidden
committer: Dmitry Antipov <address@hidden>
branch nick: trunk
timestamp: Wed 2014-09-24 15:59:13 +0400
message:
* lisp.h (USE_STACK_LISP_OBJECTS): Enable by default if GNU_LINUX
&& __GNUC__ && !__clang__. Mention known problems. Adjust comment.
modified:
src/ChangeLog changelog-20091113204419-o5vbwnq5f7feedwu-1438
src/lisp.h lisp.h-20091113204419-o5vbwnq5f7feedwu-253
=== modified file 'src/ChangeLog'
--- a/src/ChangeLog 2014-09-24 11:11:14 +0000
+++ b/src/ChangeLog 2014-09-24 11:59:13 +0000
@@ -36,6 +36,9 @@
(font_delete_unmatched): Use local_cons but respect MAX_ALLOCA.
* keymap.c (append_key): Use scoped_list1.
+ * lisp.h (USE_STACK_LISP_OBJECTS): Enable by default if GNU_LINUX
+ && __GNUC__ && !__clang__. Mention known problems. Adjust comment.
+
2014-09-24 Paul Eggert <address@hidden>
Fix some slow uses and misuses of strcat.
=== modified file 'src/lisp.h'
--- a/src/lisp.h 2014-09-23 17:03:48 +0000
+++ b/src/lisp.h 2014-09-24 11:59:13 +0000
@@ -282,7 +282,16 @@
# endif
#endif
+/* This should work on GNU/Linux with GCC. Other configurations may be
+ problematic and/or not tested yet. Clang is known to have problems,
+ see http://lists.gnu.org/archive/html/emacs-devel/2014-09/msg00506.html.
+ Also http://lists.gnu.org/archive/html/emacs-devel/2014-09/msg00422.html
+ describes an issues with 32-bit MS-Windows. */
#ifndef USE_STACK_LISP_OBJECTS
+# if defined (GNU_LINUX) && defined (__GNUC__) && !defined (__clang__)
+# define USE_STACK_LISP_OBJECTS true
+# endif
+#else
# define USE_STACK_LISP_OBJECTS false
#endif
@@ -4581,8 +4590,10 @@
better performance because GC is not involved.
This feature is experimental and requires careful debugging.
- Brave users can compile with CPPFLAGS='-DUSE_STACK_LISP_OBJECTS'
- to get into the game. */
+ It's enabled by default on GNU/Linux with GCC. On other systems,
+ brave users can compile with CPPFLAGS='-DUSE_STACK_LISP_OBJECTS'
+ to get into the game. Also note that this feature requires
+ GC_MARK_STACK == GC_MAKE_GCPROS_NOOPS. */
/* A struct Lisp_Cons inside a union that is no larger and may be
better-aligned. */
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