[LLVMdev] OSX 10.6 (Snow Leopard): strip: malformed object: clang malformed object (unknown load command 9)

[Charles Davis]

On Aug 27, 2012, at 10:42 AM, David Blaikie wrote:

> I'm working on bringing up a buildbot in the LLVM lab that would run
> the GCC and GDB DejaGNU tests.
> 
> The current problem I'm running into is shown here:
> http://lab.llvm.org:8011/builders/clang-x86_64-darwin10-gdb-gcc/builds/323/steps/install.clang.stage1/logs/stdio
> 
> When the buildbot attempts to "make install" the system 'strip' binary
> fails while attempting to strip the clang binary.
> 
> I vaguely remember hearing something about the system tools of some
> version(s) of Mac OSX not being suitable for building LLVM/Clang - so
> I assume I need to install updated system tools? Is that correct?
Yes.
> Does
> anyone have instructions for how to do this?
Here's what I did. Download the cctools and ld64 source for the latest Xcode (as of this writing, that would be 4.4) from here:

  http://opensource.apple.com

Unpack the tarballs, then build new binaries like so:

  $ cd cctools-<version>/libstuff
  $ make dynamic
  $ cd ../ar
  $ make # might need this to ensure new ranlib(1) gets called
  $ cd ../misc
  $ make libtool.NEW # need this to ranlib(1) archives with new load commands
  $ sudo install -c -m 0755 libtool.NEW /usr/local/bin/libtool # 'sudo' because /usr/local isn't world writable by default
  $ cd ../ar
  $ sudo install -c -m 0755 ar.NEW /usr/local/bin/ar
  $ sudo ln -s libtool /usr/local/bin/ranlib # will be invoked by ar(1)

Now we need the prunetrie library from ld64; otherwise, strip(1) won't build. You build it like so:

  $ cd ld64-<version>/src/other
  # No Makefiles in ld64; need to do it the hard way ;)
  # May need to go in and fix sources in ../abstraction not to refer to ARM
  # Replace <CXXFLAGS> with whatever flags you might want to pass (like -g, -O, -W options)
  # Feel free to compile against libc++, if you have it installed
  $ clang++ -c -I../abstraction <CXXFLAGS> PruneTrie.cpp
  $ ar cru libprunetrie.a PruneTrie.o # Needs ar(1) and ranlib(1) from before, because I told you to use clang :)
  $ sudo install -c -m 0644 libprunetrie.a /usr/local/lib/
  $ sudo install -d -m 0755 /usr/local/include/mach-o
  $ sudo install -c -m 0644 prune_trie.h /usr/local/include/mach-o/
  $ cd ../../../cctools-<version>/misc
  # NOTE: If you compiled libprunetrie against libc++, you'll need to make sure strip is linked against libc++, too. You can do that by setting RC_CFLAGS.
  $ make strip.NEW
  $ sudo install -c -m 0755 strip.NEW /usr/local/bin/strip

I'm sorry about the convoluted build process, but it's been this way for longer than I can remember. (It's one of the reasons the OpenDarwin project bombed so miserably.) I've verified that this works on my own computer, and I even linked against libc++ ;).

> (I may need to provide
> these instructions to Galina if I can't run them myself from the
> command line - though a self service option would be preferred)
> 
> Thanks,
> - David
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