zlib 1.2.5_0: Snow Leopard: libz.dylib contains unexpected architecture cputype

[msb2@…]

On Snow Lepoard (10.6.3, Xcode 3.2.2) Intel 64-bit, ports depending on zlib fail to upgrade/install. For example, the following error is obtained at the end of the output for

port -d install bzr :

--->  Configuring freetype
DEBUG: Using compiler 'Mac OS X gcc 4.2'
DEBUG: Executing proc-pre-org.macports.configure-configure-0
Error: File /opt/local/lib/libz.dylib contains unexpected architecture cputype.
Error: This may be a bug in the archcheck portgroup.
Error: Target org.macports.configure returned: unexpected architecture
DEBUG: Backtrace: unexpected architecture
    while executing
"$pre $targetname"
Warning: the following items did not execute (for freetype): org.macports.destroot org.macports.configure org.macports.build
DEBUG: couldn't read file "/opt/local/share/macports/Tcl/darwintrace1.0/pkgIndex.tcl": no such file or directory
    while executing
"source [file join $dir pkgIndex.tcl]"
Error: Unable to upgrade port: 1
DEBUG: upgrade python26 failed
    while executing
"macports::_upgrade_mport_deps $mport $target"
    (procedure "mportexec" line 27)
    invoked from within
"mportexec $workername $target"
Error: Unable to execute port: upgrade python26 failed

The information about zlib earlier in the output is:

DEBUG: Found port in file:///opt/local/var/macports/sources/rsync.macports.org/release/ports/archivers/zlib
DEBUG: epoch: in tree: 0 installed: 0
DEBUG: zlib 1.2.5_0 exists in the ports tree
DEBUG: zlib 1.2.5_0  is the latest installed
DEBUG: zlib 1.2.5_0  is active
DEBUG: Merging existing variants  into variants
DEBUG: new fully merged portvariants: 
DEBUG: Changing to port directory: /opt/local/var/macports/sources/rsync.macports.org/release/ports/archivers/zlib
DEBUG: OS Platform: darwin
DEBUG: OS Version: 10.3.0
DEBUG: Mac OS X Version: 10.6
DEBUG: System Arch: i386
DEBUG: setting option os.universal_supported to yes
DEBUG: org.macports.load registered provides 'load', a pre-existing procedure. Target override will not be provided
DEBUG: org.macports.unload registered provides 'unload', a pre-existing procedure. Target override will not be provided
DEBUG: org.macports.distfiles registered provides 'distfiles', a pre-existing procedure. Target override will not be provided
DEBUG: adding the default universal variant
DEBUG: Reading variant descriptions from /opt/local/var/macports/sources/rsync.macports.org/release/ports/_resources/port1.0/variant_descriptions.conf
DEBUG: Requested variant darwin is not provided by port zlib.
DEBUG: Requested variant i386 is not provided by port zlib.
DEBUG: Requested variant macosx is not provided by port zlib.
DEBUG: No need to upgrade! zlib 1.2.5_0 >= zlib 1.2.5_0

The command file /opt/local/lib/libz.dylib produces

/opt/local/lib/libz.dylib: Mach-O 64-bit dynamically linked shared library x86_64

[ryandesign (Ryan Carsten Schmidt)]

What does the command lipo -info /opt/local/lib/libz.dylib say? What kind of processor is in your Mac?

[msb2@…]

The output of lipo -info /opt/local/lib/libz.dylib is

Architectures in the fat file: /opt/local/lib/libz.dylib are: (cputype (16777223) cpusubtype (3)) i386

The output for all of the other lib*dylib files in /opt/local/lib is

Non-fat file: lib*.dylib is architecture: cputype 16777223 cpusubtype 3

The computer is a 2009 8-core Mac Pro (MacPro4,1). Output of sysctl -a machdep.cpu includes Intel(R) Xeon(R) CPU E5520 @ 2.27GHz

[ryandesign (Ryan Carsten Schmidt)]

Everywhere it's saying "cputype 16777223 cpusubtype 3" I would have expected it to say "x86_64". What does which lipo say? I wonder if maybe you have a different lipo than I do.

[msb2@…]

A) To remove one confusion: based on searching other bug reports I tried installing the universal variant of zlib. That was the reason for the difference between libz.dylib and the others. Reinstalling zlib brings the architecture to be identical to all of the other lib*dylib files in /opt/local/lib.

lipo -info /opt/local/lib/libz.dylib outputs

Non-fat file: /opt/local/lib/libz.dylib is architecture: cputype 16777223 cpusubtype 3

The "unexpected architecture cputype" error when trying to install bzr remains.

B) which lipo gives /usr/bin/lipo

[ryandesign (Ryan Carsten Schmidt)]

Replying to msb2@…:

which lipo gives /usr/bin/lipo

FYI, the error you're reporting has been reported before, in #23343. The possible resolutions suggested there are:

Does the file /usr/local/lib/libgcc_s.10.4.dylib exist? If so, remove it.

Did you upgrade to Snow Leopard from a prior version of Mac OS X? If so, have you performed the Migration procedure?

[msb2@…]

Snow Leopard is the original OS on this computer, not an upgrade.

Currently I have /usr/local renamed to /usr/local-tmp to eliminate the possibility of conflicts. In any case, this directory does not have any libgcc_s.

/usr/lib has two versions of libgcc_s:

lrwxr-xr-x  1 root  wheel    17B Aug 14  2009 libgcc_s.1.dylib -> libSystem.B.dylib
lrwxr-xr-x  1 root  wheel    19B Sep 15  2009 libgcc_s.10.4.dylib -> libgcc_s.10.5.dylib
-rwxr-xr-x  1 root  wheel    40K Jan 20 02:45 libgcc_s.10.5.dylib

Version "1" is necessary. Temporarily removing 10.4 & 10.5 from /usr/lib makes no different -- same error, same output from lipo.

[ryandesign (Ryan Carsten Schmidt)]

I'm running out of ideas to explain why your lipo output differs from mine. :) Last chance: maybe your /usr/bin/lipo has been replaced. Could you please show the output of

ls -l /usr/bin/lipo /opt/local/bin/lipo

I'm also curious about the -detailed_info output of your lipo. Maybe we can use that output to more reliably detect architectures. Could you show the output of

lipo -detailed_info /opt/local/lib/libz.dylib /usr/lib/libSystem.dylib

[msb2@…]

"ls -l /usr/bin/lipo" gives -r-xr-xr-x 1 root wheel 140936 Mar 15 2006 /usr/bin/lipo

There is no lipo at /opt/local/bin.

"lipo -detailed_info /opt/local/lib/libz.dylib" gives

input file /opt/local/lib/libz.dylib is not a fat file
Non-fat file: /opt/local/lib/libz.dylib is architecture: cputype 16777223 cpusubtype 3

"lipo -detailed_info /usr/lib/libSystem.dylib" gives

Fat header in: /usr/lib/libSystem.dylib
fat_magic 0xcafebabe
nfat_arch 3
architecture (cputype (16777223) cpusubtype (3))
    cputype (16777223)
    cpusubtype cpusubtype (3)
    offset 4096
    size 2352544
    align 2^12 (4096)
architecture i386
    cputype CPU_TYPE_I386
    cpusubtype CPU_SUBTYPE_I386_ALL
    offset 2359296
    size 2203168
    align 2^12 (4096)
architecture ppc7400
    cputype CPU_TYPE_POWERPC
    cpusubtype CPU_SUBTYPE_POWERPC_7400
    offset 4562944
    size 2289296
    align 2^12 (4096)

[msb2@…]

I replaced /usr/bin/lipo with a lipo obtained from another Snow Leopard machine, which had a date of 2009. Now "lipo -info /opt/local/lib/libz.dylib" gives

Non-fat file: /opt/local/lib/libz.dylib is architecture: x86_64

The install of bzr just completed! Thanks for your help!

[tobypeterson]

ok, broken OS install apparently

[vona@…]

I found I had what appears to be the same old version of lipo also on my system, and also causing problems for macports.

Please see bug report #23343 for my notes on how to get a replacment lipo (that works) off our os x install dvd.