Makefile.darwin

# SPDX-License-Identifier: Apache-2.0

# Try to use the libclang that comes with Xcode.
#
# This is almost certainly an ill-advised thing to do, but
# it does avoid having to install llvm from homebrew (or from
# source).
#
# The really ugly part is that you have to obtain a copy of
# the libclang header files from somewhere. Becaue libclang
# is supposed to provide a stable interface, I'm hoping that
# we'll usually get away with this.
#
## Deciding which headers to copy
#
# Look at the output of clang --version; it will print something
# like "Apple clang version 15.0.0 (clang-1500.3.9.4)"
# 
# This looks like it might matche the tag llvmorg-15.0.0 in the
# https://github.com/llvm/llvm-project repository.
#
# So, it makes sense to try grabbing the libclang include files from
# https://github.com/llvm/llvm-project/tree/llvmorg-15.0.0/clang/include/clang-c
#
# Copy all those headers into ./include/clang-c and then hope
# for the best.
#
# If this doesn't work, bite the bullet and install llvm from
# homebrew or by hand.

# The library directory that contains the Xcode-bundled libclang
D=$(shell xcode-select --print-path)
EXTRA_LIBDIR="$(D)/Toolchains/XcodeDefault.xctoolchain/usr/lib"

INCDIR=include

all:
	$(CC) -rpath $(EXTRA_LIBDIR) -L $(EXTRA_LIBDIR) \
		 -I $(INCDIR) -lclang source/ffigen5.c -o ffigen5

clean:
	rm -f ffigen5