Re: 4.0.0->4.0.1 regression: Can't use 64-bit shared libs on powerpc-apple-darwin8.1.0

[Bradley Lucier <lucier at math dot purdue dot edu>]

It seems that the libtool command line may be wrong.  Here's a simple  
test.

[descartes:~/programs] lucier% cat conftest.c
int main2() { return 0;}
[descartes:~/programs] lucier% gcc -m64 -mcpu=970 -o conftest  
-dynamiclib conftest.c -v -save-temps
Using built-in specs.
Target: powerpc-apple-darwin8.1.0
Configured with: ../configure --prefix=/pkgs/gcc-4.0-mainline  
--with-gmp=/pkgs/gmp-4.1.3 --with-mpfr=/pkgs/gmp-4.1.3  
--enable-languages=c,c++,objc,obj-c++,f95
Thread model: posix
gcc version 4.1.0 20050615 (experimental)
 /pkgs/gcc-4.0-mainline/libexec/gcc/powerpc-apple-darwin8.1.0/4.1.0/cc1  
-E -quiet -v -D__DYNAMIC__ -D__APPLE_CC__=1 conftest.c -fPIC -m64  
-mcpu=970 -fpch-preprocess -o conftest.i
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory  
"/pkgs/gcc-4.0-mainline/lib/gcc/powerpc-apple-darwin8.1.0/4.1.0/../../ 
../../powerpc-apple-darwin8.1.0/include"
#include "..." search starts here:
#include <...> search starts here:
 /pkgs/gcc-4.0-mainline/include
 /pkgs/gcc-4.0-mainline/lib/gcc/powerpc-apple-darwin8.1.0/4.1.0/include
 /usr/include
 /System/Library/Frameworks
 /Library/Frameworks
End of search list.
 /pkgs/gcc-4.0-mainline/libexec/gcc/powerpc-apple-darwin8.1.0/4.1.0/cc1  
-fpreprocessed conftest.i -fPIC -quiet -dumpbase conftest.c -m64  
-mcpu=970 -auxbase conftest -version -o conftest.s
GNU C version 4.1.0 20050615 (experimental) (powerpc-apple-darwin8.1.0)
        compiled by GNU C version 4.1.0 20050615 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 856564be1b7d2e1a3d0c80ce3c26789d
 as -arch ppc64 -o conftest.o conftest.s
 /usr/bin/libtool -dynamic -arch_only ppc64 -noall_load  
-weak_reference_mismatches non-weak -o conftest  
-L/pkgs/gcc-4.0-mainline/lib/gcc/powerpc-apple-darwin8.1.0/4.1.0/ppc64  
-L/pkgs/gcc-4.0-mainline/lib/gcc/powerpc-apple-darwin8.1.0/4.1.0/../../ 
../ppc64 conftest.o -lgcc_s_ppc64 -lgcc -lSystemStubs -lmx -lSystem
/usr/bin/libtool: can't locate file for: -lgcc_s_ppc64
/usr/bin/libtool: file: -lgcc_s_ppc64 is not an object file (not  
allowed in a library)

However, if I add by hand /pkgs/gcc-4.0-mainline/lib, where  
libgcc_s_ppc64.1.0.dylib is installed, to the link path to libtool, I  
get

[descartes:~/programs] lucier% /usr/bin/libtool -dynamic -arch_only  
ppc64 -noall_load -weak_reference_mismatches non-weak -o conftest  
-L/pkgs/gcc-4.0-mainline/lib/gcc/powerpc-apple-darwin8.1.0/4.1.0/ppc64  
-L/pkgs/gcc-4.0-mainline/lib/gcc/powerpc-apple-darwin8.1.0/4.1.0/../../ 
../ppc64 conftest.o -lgcc_s_ppc64 -lgcc -lSystemStubs -lmx -lSystem  
-L/pkgs/gcc-4.0-mainline/lib
[descartes:~/programs] lucier% file conftest
conftest: Mach-O 64-bit dynamically linked shared library ppc64
[descartes:~/programs] lucier% otool64 -L conftest
conftest:
        conftest (compatibility version 0.0.0, current version 0.0.0)
        /pkgs/gcc-4.0-mainline/lib/libgcc_s_ppc64.1.0.dylib  
(compatibility version 1.0.0, current version 1.0.0)
        /usr/lib/libmx.A.dylib (compatibility version 1.0.0, current  
version 92.0.0)
        /usr/lib/libSystem.B.dylib (compatibility version 1.0.0,  
current version 88.0.0)

Perhaps someone moved libgcc_s_ppc64.1.0.dylib but didn't change the  
script that builds the libtool command line to tell libtool where to  
find it?

Brad