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* [Bug target/26877] New: configure switches --with-arch and --with-tune are broken on x86
@ 2006-03-26 16:51 lasse dot collin at tukaani dot org
2006-03-30 20:25 ` [Bug target/26877] " pinskia at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: lasse dot collin at tukaani dot org @ 2006-03-26 16:51 UTC (permalink / raw)
To: gcc-bugs
I was trying to build GCC on x86 so that it would default to -march=i586
-mtune=i686. I specified --with-arch=i586 --with-tune=i686 to configure, but
the resulting gcc still used -mtune=i586 instead of -mtune=i686.
The configure switches --with-arch, --with-cpu and --with-tune write
appropriate values to gcc/configargs.h correctly. However, if --with-arch=foo
has been specified, the cpu and tune values have no effect, because in
gcc/config/i386/i386.h the order of arch/tune/cpu is wrong:
#define OPTION_DEFAULT_SPECS \
{"arch", "%{!march=*:-march=%(VALUE)}"}, \
{"tune", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \
{"cpu", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }
Example command line: gcc -o foo foo.c
"arch": -march= hasn't been given on the command line, append
-march=%(VALUE). This is correct.
"tune": -mtune= hasn't been given on the command line, neither
is -mcpu=. But -march is (we just appended it) so
-mtune=%(VALUE) does NOT get appended. This is wrong.
"cpu": Same as with "tune".
The solution is changing the order from arch/tune/cpu to tune/cpu/arch. This
problem applies to at least GCC 3.4.6 and 4.1.0; probably all versions since
3.4.0.
--- gcc-4.1.0/gcc/config/i386/i386.h.orig 2006-03-24 23:22:04.000000000
+0200
+++ gcc-4.1.0/gcc/config/i386/i386.h 2006-03-24 23:39:30.000000000 +0200
@@ -269,9 +269,9 @@
/* Support for configure-time defaults of some command line options. */
#define OPTION_DEFAULT_SPECS \
- {"arch", "%{!march=*:-march=%(VALUE)}"}, \
{"tune", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \
- {"cpu", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }
+ {"cpu", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \
+ {"arch", "%{!march=*:-march=%(VALUE)}"}
/* Specs for the compiler proper */
--
Summary: configure switches --with-arch and --with-tune are
broken on x86
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: trivial
Priority: P3
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: lasse dot collin at tukaani dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26877
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/26877] configure switches --with-arch and --with-tune are broken on x86
2006-03-26 16:51 [Bug target/26877] New: configure switches --with-arch and --with-tune are broken on x86 lasse dot collin at tukaani dot org
@ 2006-03-30 20:25 ` pinskia at gcc dot gnu dot org
2006-07-19 21:59 ` echristo at apple dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2006-03-30 20:25 UTC (permalink / raw)
To: gcc-bugs
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|trivial |normal
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26877
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/26877] configure switches --with-arch and --with-tune are broken on x86
2006-03-26 16:51 [Bug target/26877] New: configure switches --with-arch and --with-tune are broken on x86 lasse dot collin at tukaani dot org
2006-03-30 20:25 ` [Bug target/26877] " pinskia at gcc dot gnu dot org
@ 2006-07-19 21:59 ` echristo at apple dot com
2006-07-20 7:40 ` echristo at apple dot com
2006-07-20 7:40 ` echristo at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: echristo at apple dot com @ 2006-07-19 21:59 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from echristo at apple dot com 2006-07-19 21:59 -------
I'll take this since I've submitted a patch.
--
echristo at apple dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |echristo at apple dot com
|dot org |
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2006-07-19 21:59:21
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26877
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/26877] configure switches --with-arch and --with-tune are broken on x86
2006-03-26 16:51 [Bug target/26877] New: configure switches --with-arch and --with-tune are broken on x86 lasse dot collin at tukaani dot org
2006-03-30 20:25 ` [Bug target/26877] " pinskia at gcc dot gnu dot org
2006-07-19 21:59 ` echristo at apple dot com
@ 2006-07-20 7:40 ` echristo at apple dot com
2006-07-20 7:40 ` echristo at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: echristo at apple dot com @ 2006-07-20 7:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from echristo at apple dot com 2006-07-20 07:40 -------
Fixed thusly:
2006-07-20 Eric Christopher <echristo@apple.com>
PR target/26877
* config/i386/i386.h (OPTION_DEFAULT_SPECS): Reorder.
--
echristo at apple dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26877
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/26877] configure switches --with-arch and --with-tune are broken on x86
2006-03-26 16:51 [Bug target/26877] New: configure switches --with-arch and --with-tune are broken on x86 lasse dot collin at tukaani dot org
` (2 preceding siblings ...)
2006-07-20 7:40 ` echristo at apple dot com
@ 2006-07-20 7:40 ` echristo at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: echristo at gcc dot gnu dot org @ 2006-07-20 7:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from echristo at gcc dot gnu dot org 2006-07-20 07:40 -------
Subject: Bug 26877
Author: echristo
Date: Thu Jul 20 07:40:12 2006
New Revision: 115609
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=115609
Log:
2006-07-20 Eric Christopher <echristo@apple.com>
PR target/26877
* config/i386/i386.h (OPTION_DEFAULT_SPECS): Reorder.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.h
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26877
^ permalink raw reply [flat|nested] 5+ messages in thread
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2006-03-26 16:51 [Bug target/26877] New: configure switches --with-arch and --with-tune are broken on x86 lasse dot collin at tukaani dot org
2006-03-30 20:25 ` [Bug target/26877] " pinskia at gcc dot gnu dot org
2006-07-19 21:59 ` echristo at apple dot com
2006-07-20 7:40 ` echristo at apple dot com
2006-07-20 7:40 ` echristo at gcc dot gnu dot org
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