From 504b95338cdc1e9c6225785fd16e338027357d57 Mon Sep 17 00:00:00 2001
From: Keno Fischer <kenof@stanford.edu>
Date: Mon, 28 May 2012 15:47:03 -0400
Subject: [PATCH] Commit ugly llvm python workaround to make it compile on Arch

---
 deps/Makefile | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/deps/Makefile b/deps/Makefile
index 900461709f3e1..65d7d303d91ef 100644
--- a/deps/Makefile
+++ b/deps/Makefile
@@ -142,11 +142,22 @@ llvm-$(LLVM_VER)/configure: $(LLVM_TAR)
 	tar -C llvm-$(LLVM_VER) --strip-components 1 -xf $<
 	touch $@
 
-$(LLVM_OBJ_SOURCE): llvm-$(LLVM_VER)/configure
+## LLVM needs python 2.x, but doesn't check for it, so we have to use an ugly workaround to make it compile
+llvm_python_workaround:
+	-python -c 'import sys; sys.exit(not sys.version_info > (3, 0))' && \
+	/usr/bin/python2 -c 'import sys; sys.exit(not sys.version_info < (3, 0))' && \
+	export PATH=$(abspath llvm-$(LLVM_VER)/python2_path):$$PATH && \
+	test ! -e llvm-$(LLVM_VER)/python2_path/python && \
+	mkdir -p llvm-$(LLVM_VER)/python2_path && \
+	ln -s /usr/bin/python2 "llvm-$(LLVM_VER)/python2_path/python"
+
+$(LLVM_OBJ_SOURCE): llvm-$(LLVM_VER)/configure llvm_python_workaround
 	cd llvm-$(LLVM_VER) && \
+	export PATH=$(abspath llvm-$(LLVM_VER)/python2_path):$$PATH && \
 	./configure --prefix=$(abspath $(USR)) --disable-threads --enable-optimized --disable-profiling --disable-assertions --enable-shared --enable-targets=x86,x86_64 --disable-bindings --disable-docs CC=$(GCC) CXX=$(GPLUSPLUS) && \
 	$(MAKE)
-$(LLVM_OBJ_TARGET): $(LLVM_OBJ_SOURCE)
+$(LLVM_OBJ_TARGET): $(LLVM_OBJ_SOURCE) llvm_python_workaround
+	export PATH=$(abspath llvm-$(LLVM_VER)/python2_path):$$PATH && \
 	$(MAKE) -C llvm-$(LLVM_VER) install
 	$(INSTALL_NAME_CMD) libLLVM-$(LLVM_VER).$(SHLIB_EXT) $(USRLIB)/libLLVM-$(LLVM_VER).$(SHLIB_EXT)
 	touch $@