Is there a standard way to tell brew (homebrew package manager for Mac OS) to build combined 32/64-bit binaries?

Question

Is there a standard way to tell brew to compile libraries with "fat" 32/64 combination libraries? I'd like to build libxml2 for combo 32/64 bit?

/usr/local/lib/libxml2.dylib: Mach-O 64-bit dynamically linked shared library x86_64

I can do it if I build the library "by hand", but I'm wondering if there's some convention for brew and brew formula to tell brew to do this.

Answer 1

There's no standard way. Some formulae have a --universal option for doing this (but not all of them).