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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
end of thread, other threads:[~2006-07-20 7:40 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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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