I have a makefile
that works transparently for Linux (x86_64
) and OS X Intel (x86_64
). This uses 64-bit specific GCC options.
Is there a way to adjust the makefile so that I could build for 32-bit and 64-bit OS X PPC (ppc
, ppc64
) without having to maintain separate, arch-specific makefiles — perhaps something like a pre-processor directive that can determine the architecture before building?
ARCH := $(shell getconf LONG_BIT)
CPP_FLAGS_32 := -D32_BIT ... Some 32 specific compiler flags ...
CPP_FLAGS_64 := -D64_BIT
CPP_FLAGS := $(CPP_FLAGS_$(ARCH)) ... all the other flags ...