Homebrew build with different arch?

Question

I tried to install mysql-connector-c recipe via homebrew, and it builds just fine, but produces x86_64 library:

  $file ~/brew/lib/libmysql.dylib 
  .../brew/lib/libmysql.dylib: Mach-O 64-bit dynamically linked shared library x86_64

I however need i386 library for my project. I tried to give it CFLAGS and LDFLAGS like this:

  CFLAGS="-arch i386 -arch x86_64" LDFLAGS="-arch i386 -arch x86_64" brew install mysql-connector-c

but nothing changes - it still builds x86_64 only binary. Is there any way to make homebrew build either dual arch library or i386 library? I have kernel architecture set to x86_64, if it matters.

Answer 1

You may try the following:

brew edit mysql-connector-c

and then modify the initialization in the "install" block.

Although I did not try this out, you are supposed to do something like this:

ENV['CFLAGS']='xxx'
ENV['LDFLAGS']='xxx'

You might check the example here: Problems with homebrew, can't install anything...

Answer 2

Encountered similar issue installing DevIL. It appears that Homebrew is trying to sanitize commandline parameters passed to tools, at least on ML:

$ brew install -v devil
...
brew: superenv removed: -arch i386
...

It worked for me to edit the formula like in Walty's answer to specify CFLAGS and CXXFLAGS, but run install with a standard environment instead:

$ brew install --env=std devil

Answer 3

Some Formulas have a universal option that would let you compile for both i386 and x86_64 at the same time:

$ brew options sdl
--universal
        Build a universal binary

The mysql-connector-c doesn't offer it as an option but I found it very easy to add the option to another formula I was working on: https://github.com/mxcl/homebrew/pull/18713/files