[Bug bootstrap/42785] New: error: impossible constraint in easmf

[Bug bootstrap/42785] New: error: impossible constraint in easmf

[monaka at monami-software dot com]

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I got "error: impossible constraint in easmf" on the build time.
It only happens building with "-arch ppc" option. There is no errors in case I
choice "-arch i386"/"-arch x86_64".

gcc -arch ppc -c  -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -W -Wall
-Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes
-Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -Wold-style-definition -Wc++-compat -fno-common 
-DHAVE_CONFIG_H -I. -I. -I../../../../../gcc -I../../../../../gcc/.
-I../../../../../gcc/../include -I./../intl
-I../../../../../gcc/../libcpp/include -I/opt/gcc4build/include
-I/opt/gcc4build/include  -I../../../../../gcc/../libdecnumber
-I../../../../../gcc/../libdecnumber/dpd -I../libdecnumber     -I. -I.
-I../../../../../gcc -I../../../../../gcc/. -I../../../../../gcc/../include
-I./../intl -I../../../../../gcc/../libcpp/include -I/opt/gcc4build/include
-I/opt/gcc4build/include  -I../../../../../gcc/../libdecnumber
-I../../../../../gcc/../libdecnumber/dpd -I../libdecnumber   
../../../../../gcc/config/i386/driver-i386.c
../../../../../gcc/config/i386/driver-i386.c: In function edetect_l2_cachef:
../../../../../gcc/config/i386/driver-i386.c:68: error: impossible constraint
in easmf
make[1]: *** [driver-i386.o] Error 1
make: *** [all-gcc] Error 2


the result of host gcc -v is:
Using built-in specs.
Target: i686-apple-darwin10
Configured with: /var/tmp/gcc/gcc-5646.1~2/src/configure --disable-checking
--enable-werror --prefix=/usr --mandir=/share/man
--enable-languages=c,objc,c++,obj-c++
--program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib
--build=i686-apple-darwin10 --with-gxx-include-dir=/include/c++/4.2.1
--program-prefix=i686-apple-darwin10- --host=x86_64-apple-darwin10
--target=i686-apple-darwin10
Thread model: posix
gcc version 4.2.1 (Apple Inc. build 5646) (dot 1)


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           Summary: error: impossible constraint in easmf
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: monaka at monami-software dot com
 GCC build triplet: i386-apple-darwin10.2.0
  GCC host triplet: i386-apple-darwin10.2.0
GCC target triplet: i386-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785

[Bug bootstrap/42785] error: impossible constraint in �easm�f

[pinskia at gcc dot gnu dot org]

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------- Comment #1 from pinskia at gcc dot gnu dot org  2010-01-18 00:56 -------
If you use -arch ppc, then the host/build is really powerpc-apple-darwin so
obviously you are configuring GCC incorrectly and the error message is correct
as that is x86 inline-asm that is being compiled in that source. 


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID
            Summary|error: impossible constraint|error: impossible constraint
                   |in easmf                  |in �easm�f


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785

[Bug bootstrap/42785] error: impossible constraint in 'asm'

[monaka at monami-software dot com]

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------- Comment #2 from monaka at monami-software dot com  2010-01-18 23:29 -------
(In reply to comment #1)
> If you use -arch ppc, then the host/build is really powerpc-apple-darwin so
> obviously you are configuring GCC incorrectly and the error message is correct
> as that is x86 inline-asm that is being compiled in that source. 

There is no need to use -arch option if we use powerpc-apple-darwin host/build.
I think it can be resolved by a patch follows.

diff --git a/gcc/config/i386/driver-i386.c b/gcc/config/i386/driver-i386.c
index 17694ef..dc69a80 100644
--- a/gcc/config/i386/driver-i386.c
+++ b/gcc/config/i386/driver-i386.c
@@ -25,7 +25,7 @@ along with GCC; see the file COPYING3.  If not see

 const char *host_detect_local_cpu (int argc, const char **argv);

-#ifdef __GNUC__
+#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 #include "cpuid.h"

 struct cache_desc


-- 

monaka at monami-software dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |
            Summary|error: impossible constraint|error: impossible constraint
                   |in �easm�f              |in 'asm'


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785

[Bug bootstrap/42785] error: impossible constraint in 'asm'

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2010-01-19 00:10 -------
driver-i386.c should not be included if you are compiling for a PPC host/build
really.  So it is a problem of you misconfiguring GCC really and nothing else.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785

[Bug bootstrap/42785] error: impossible constraint in 'asm'

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2010-01-19 00:13 -------
More to the point, use lipo to combine the gcc drivers after the fact to get a
dual arch executable.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785

[Bug bootstrap/42785] error: impossible constraint in 'asm'

[monaka at monami-software dot com]

------- Comment #5 from monaka at monami-software dot com  2010-01-19 02:42 -------
(In reply to comment #3)
> driver-i386.c should not be included if you are compiling for a PPC host/build
> really.  So it is a problem of you misconfiguring GCC really and nothing else.

I see what you want to say, but.
The another viewpoint:
In i386-driver.c, there is decided by "#ifdef __GNUC__" which
host_detect_local_cpu (dummy or not) is used 
In i386.h, there is decided by "#if defined(__i386__) || defined(__x86_64__) if
it defines EXTRA_SPEC_FUNCTIONS .
They are inconsistent, right?

P.S.
Thanks for your information about lipo. I know about it and I've already
released binary distributions.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785

[Bug bootstrap/42785] error: impossible constraint in 'asm'

[pinskia at gcc dot gnu dot org]

------- Comment #6 from pinskia at gcc dot gnu dot org  2010-01-19 02:45 -------
>They are inconsistent, right?
No because i386-driver.c is only supposed to be compiled with a x86 or x86_64
compiler.  Really the file could have 
#if !defined(__i386__) && !defined(__x86_64__)
#error "This should only be compiled with an x86 compiler"
#endif

And still be correct.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42785