How to get protobuf-c compiled for linking to PHP extensions under OS X

I'm writing a PHP extension at the moment that uses the C variant of Google protocol buffers - here. Unfortunately the PHP build I'm using uses 32-bit code for the commandline php, but 64-bit when running under apache. Here is the magic recipe.


First, build the standard C++/Java protocol buffers code

jons-macpro:protobuf-2.1.0 jmeredith$ cat BUILDIT 
ARCH='-arch i386 -arch x86_64' 
./configure --prefix=/Users/jmeredith/Applications/protobuf CFLAGS="$ARCH" CXXFLAGS="$ARCH" --disable-dependency-tracking && \
make  && \
make install

Then build protobuf-c which uses protobuf

jons-macpro:protobuf-c-0.11 jmeredith$ cat BUILDIT 
## Make sure protoc is in your path or this will die
ARCH="-arch i386 -arch x86_64"
./configure --prefix=/Users/jmeredith/Applications/protobuf-c \
  CXXFLAGS="-I/Users/jmeredith/Applications/protobuf/include $ARCH" \
  CFLAGS="$ARCH"  \
  LDFLAGS="-L/Users/jmeredith/Applications/protobuf/lib" \
  --disable-dependency-tracking && \
make && \
make install

Add this to the extension config.m4

  dnl # protobuf-c
  if test "$PHP_PROTOBUFC" != "no"; then
    PHP_ADD_INCLUDE($PHP_PROTOBUFC/include)
    PHP_ADD_LIBRARY_WITH_PATH(protobuf-c, $PHP_PROTOBUFC/lib, MAGNETO_SHARED_LIBADD)
  fi

And finally, to build your PHP extension

   phpize
   CFLAGS='-arch i386 -arch x86_64' ./configure --enable-yourextension --with-protobufc=/path/to/pb-c && \
   make && \
   sudo make install