pkg/45377: devel/libatomic_ops fails to build on Darwin (Mac OS 10.7)

[bsiegert%netbsd.org@localhost]

>Number:         45377
>Category:       pkg
>Synopsis:       devel/libatomic_ops fails to build on Darwin (Mac OS 10.7)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Sep 19 11:05:00 +0000 2011
>Originator:     Benny Siegert
>Release:        Mac OS 10.7.1
>Organization:
The MirBSD Project
>Environment:
Darwin lem.local 11.1.0 [...] x86-64
>Description:
The devel/libatomic_ops package does not build on an Intel Mac running Mac OS 
10.7. A log of "bmake" follows:

===> Building for libatomic_ops-20081024nb3
Making all in src
/usr/bin/gnumake  all-recursive
Making all in atomic_ops
Making all in sysdeps
gnumake[4]: Nothing to be done for `all'.
gnumake[4]: Nothing to be done for `all-am'.
/bin/sh ../libtool --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.   
-no-cpp-precomp -isystem /usr/include -fPIC -pipe -O2 -DNDEBUG -MT 
atomic_ops.lo -MD -MP -MF .deps/atomic_ops.Tpo -c -o atomic_ops.lo atomic_ops.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -no-cpp-precomp -isystem 
/usr/include -fPIC -pipe -O2 -DNDEBUG -MT atomic_ops.lo -MD -MP -MF 
.deps/atomic_ops.Tpo -c atomic_ops.c  -fno-common -DPIC -o .libs/atomic_ops.o
atomic_ops/sysdeps/gcc/x86.h: In function 'AO_test_and_set_full':
atomic_ops/sysdeps/gcc/x86.h:114: error: unsupported inline asm: input 
constraint with a matching output constraint of incompatible type!
gnumake[3]: *** [atomic_ops.lo] Error 1
gnumake[2]: *** [all-recursive] Error 1
gnumake[1]: *** [all] Error 2
gnumake: *** [all-recursive] Error 1
*** Error code 2

>How-To-Repeat:
Compile devel/libatomic_ops on Darwin 11.1.0 (Mac OS 10.7).
>Fix: