Dave,
The analysis of gcc42 is incorrect. There are no fat binaries
created but rather an explicit 64-bit subdirectory. So we have
for example...
/sw/lib/gcc4.2/lib/libgfortran.2.0.0.dylib
currently in the gcc42-shlibs package and...
/sw/lib/gcc4.2/lib/ppc64/libgfortran.2.dylib
in the gcc42 package. This compares to how
gcc 4.2 installs on x86_64 linux with...
/usr/lib/gcc/lib/libgfortran.so.2
and
/usr/lib/gcc/lib64/libgfortran.so.2
I believe the Darwin developers avoided using a lib64 directory
instead of ppc64 because there was no other example of that
on MacOS X.
We really do want to move the libraries currently in
/sw/lib/gcc4.2/lib/ppc64 from the gcc42 package to the
gcc42-shlibs package. Otherwise anything built with -m64
will break when we need to create a gcc43 package later
since the gcc4X packages will always conflict but the
gcc4X-shlibs will co-exist. The last option sounds right
except for the need to use -64bit. This is incorrect since
that option should be saved for a package which would be
a true 64-bit gcc compiler (ie gcc built with a host
of powerpc64-apple-darwin*). Again, there are three ways
to currently build gcc 4.2 and later...
1) using host powerpc-apple-darwin* passing --disable-multilib
for the stock 32-bit compiler with only 32-bit support libs.
2) using host powerpc-apple-darwin* without --disable-multilib
for the stock 32-bit compiler which can compile 64-bit code
and provides both 32-bit and 64-bit support libs.
3) using host powerpc64-apple-darwin* (which only works on
64-bit processors) for a 64-bit native compiler which can
compile 32-bit code and provides both 64-bit and 32-bit
support libs.
The third option is highly experimental and not
recommended.
Jack
On Sat, Jan 13, 2007 at 04:26:02AM -0800, David R. Morrison wrote:
>
> Finally, if (as is the case, according to jfm's analysis of your
> package) some of the libraries installed by your package are "fat"
> 32-64 bit libraries, they get stored in the same directory as the 32
> bit libraries and their Shlibs entry ends in 32-64.
>
>
>
>
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