[RFC]: Darwin framework patch

[Adam Fedor]

On Mac OS X/darwin, I get this error when I start ProjectCenter:

openapp ProjectCenter.debug
dyld: 
/usr/GNUstep/System/Applications/ProjectCenter.debug/ProjectCenter 
can't open library: ProjectCenter.framework/ProjectCenter  (No such 
file or directory, errno = 2)
Trace/BPT trap

A very simple fix for this is to actually create the top-level symlink 
on darwin and not just with the apple combo:

Index: Instance/framework.make
===================================================================
RCS file: /cvsroot/gnustep/gnustep/core/make/Instance/framework.make,v
retrieving revision 1.62
diff -u -r1.62 framework.make
--- Instance/framework.make     6 Apr 2005 12:02:17 -0000       1.62
+++ Instance/framework.make     14 Apr 2005 16:34:14 -0000
@@ -385,7 +385,7 @@
 	$(ECHO_COMPILING)$(CC) $< -c $(ALL_CPPFLAGS) $(ALL_OBJCFLAGS) -o 
$@$(END_ECHO)
 endif

-ifeq ($(FOUNDATION_LIB), apple)
+ifeq ($(findstring darwin, $(GNUSTEP_TARGET_OS)), darwin)
 # When building native frameworks on Apple, we need to create a
 # top-level symlink xxx.framework/xxx ---> the framework shared
 # library

============

I think there has been some discussion of this and 'true' framework 
support on darwin before. There's a rambling statement in 
ld_lib_path.sh about how the darwin linker is misbehaving, but really 
it is our fault.  When we link the framework (target.make:310) we set 
the install_name to the framework name, and dyld is smart to look for 
the library under that name rather than the actual link name (but only 
if DYLD_FRAMEWORK_PATH is set, of course, will it find it).

Two alternative solutions to avoid this dilemma would be to:

1. set the install_name to lib$(GNUSTEP_INSTANCE), so that it works 
like all other platforms
2. set the install_name to the absolute path to the framework (this is 
how Apple does it, but we don't necessarily know until install time 
where that is).

Well, in the mean time, perhaps I'll just apply this patch.  It doesn't 
change any behavior, it just makes the current (perhaps in some 
people's opinion, broken) behavior work.