configure: Define OS_OBJECT_USE_OBJC=0 for MacOSX builds
commita0b7cf6b6ecc91e730de5ac6a6f7f927d16f89ca
authorPeter Maydell <peter.maydell@linaro.org>
Sat, 11 Aug 2012 21:34:39 +0000 (11 22:34 +0100)
committerAnthony Liguori <aliguori@us.ibm.com>
Thu, 16 Aug 2012 18:41:15 +0000 (16 13:41 -0500)
tree7e94944cefbe9bdf6f50be8702915da898591852
parentbbea4050802a2e7e0296a21823c0925782c02b93
configure: Define OS_OBJECT_USE_OBJC=0 for MacOSX builds

MacOSX 10.8 ("Mountain Lion") defaults to trying to use automated
reference counting on certain objects.  This means that the system
header files will use some Objective C syntax constructs even when
compiling pure C, which confuses mainline gcc. Suppress this by
setting OS_OBJECT_USE_OBJC=0. This avoids a compile error like this:

In file included from
/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:5:0,
                 from /usr/include/os/object.h:74,
                 from /usr/include/dispatch/dispatch.h:48,
                 from /System/Library/Frameworks/IOKit.framework/Headers/IOKitLib.h:56,
                 from block/raw-posix.c:35:
/System/Library/Frameworks/Foundation.framework/Headers/NSObjCRuntime.h:409:1: error: stray ‘@’ in program
[with a large number of further run-on errors]

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
configure