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

[monaka at monami-software dot com]

--- 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


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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.


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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