Re: OS X and gnustep-base 1.21.1

[Wolfgang Lux]

Eric Wasylishen wrote:

> Hi,
>
> After getting GNUstep-base 1.19.1 working on OS X with macports  
> thanks to Ivan's help, I decided to try base 1.21.1.
>
> I'm running in to some problems now in the ObjectiveC2 framework.
>
>
> 1. The Source/ObjectiveC2/Availability.h file conflicts with apple's  
> in /usr/include.
> This is because:
> a) gnustep-make supplies -I. to gcc
> b) blocks_runtime.c includes stdlib.h
> c) apple's /usr/include/stdlib.h #includes <Availability.h>, which  
> is in /usr/include, but the copy in Source/ObjectiveC2/ takes  
> precedence because of the -I.   This breaks some things in apple's  
> stdlib.h

This error is no longer present in svn HEAD. Maybe you just wait for  
the next GNUstep release?

> 2. The #include <objc/objc.h> in runtime.c is a problem.
> I've learned that if gcc thinks it is compiling objective-c (i.e. .m  
> file, or .c file with the -x objective-c flag), and it is passed the  
> -fgnu-runtime flag, it will automatically add the /opt/local/lib/ 
> gcc44/gcc/x86_64-apple-darwin10/4.4.5/include-gnu-runtime/ directory  
> to the include path, so the #include <objc/objc.h> would pick up the  
> right file. But, since runtime.c is a c file, this doesn't happen,  
> and apple's objc.h in /usr/include/objc is picked up instead.

Here is a nasty patch (against svn HEAD, but it may work for 1.21.1  
too) to fix that issue:

patch-ObjectiveC2-Makefile.preamble
Description: Binary data

> 3. there's an error caused by the -march=i686 flag:
>
> 712 :info:build /opt/local/bin/gcc-mp-4.4 blocks_runtime.m -c \
> 713 :info:build           -MMD -MP -I/opt/local/include -Wall - 
> Wdeclaration-after-statement -DGNUSTEP -DGNUSTEP_BASE_LIBRARY=1 - 
> DGNU_RUNTIM     E=1 -DGNUSTEP_BASE_LIBRARY=1 -fno-common -Wall - 
> DGSWARN -DGSDIAGNOSE -Wno-import -pipe -O2 -fno-strict-aliasing - 
> fgnu-runtime -fgnu-run     time -march=i686 -fconstant-string- 
> class=NSConstantString -I../../Headers/Additions -I../. -I../ - 
> I../../Headers -I. -I/opt/local/inclu     de -I/opt/local/GNUstep/ 
> System/Library/Headers -I/opt/local/GNUstep/Local/Library/Headers -I/ 
> opt/local/GNUstep/Local/Library/Headers -I     /opt/local/include/ 
> libxml2 \
> 714 :info:build            -o obj/ObjectiveC2.obj/blocks_runtime.m.o
> 715 :info:build blocks_runtime.m:1: error: CPU you selected does not  
> support x86-64 instruction set
>
> It goes away if I delete this part of Source/ObjectiveC2/GNUmakefile:
> 54 ifeq ($(GNUSTEP_TARGET_CPU), ix86)
> 55   ADDITIONAL_OBJCFLAGS += -march=i686
> 56 endif
>
> I'm not sure why the march=i686 was causing an error.

Again, this is no longer the case in svn HEAD.

Wolfgang