#-------------------------------------------------------------------------------
# Sample makefile for building the code samples. Read inline comments for
# documentation.
#
# Eli Bendersky (eliben@gmail.com)
# This code is in the public domain
#-------------------------------------------------------------------------------

# The following variables will likely need to be customized, depending on where
# and how you built LLVM & Clang. They can be overridden by setting them on the
# make command line: "make VARNAME=VALUE", etc.

LLVM_VERSION := -3.8

# CXX has to be a fairly modern C++ compiler that supports C++11. gcc 4.8 and
# higher or Clang 3.2 and higher are recommended. Best of all, if you build LLVM
# from sources, use the same compiler you built LLVM with.
CXX := clang++$(LLVM_VERSION)
CXXFLAGS := -fno-rtti -g
PLUGIN_CXXFLAGS := -fpic

LLVM_CXXFLAGS := `llvm-config$(LLVM_VERSION) --cxxflags`
LLVM_LDFLAGS := `llvm-config$(LLVM_VERSION) --ldflags --libs --system-libs`

# Plugins shouldn't link LLVM and Clang libs statically, because they are
# already linked into the main executable (opt or clang). LLVM doesn't like its
# libs to be linked more than once because it uses globals for configuration
# and plugin registration, and these trample over each other.
LLVM_LDFLAGS_NOLIBS := `llvm-config$(LLVM_VERSION) --ldflags`
PLUGIN_LDFLAGS := -shared

CLANG_INCLUDES := -I/usr/lib/llvm$(LLVM_VERSION)/include

# List of Clang libraries to link. The proper -L will be provided by the
# call to llvm-config
# Note that I'm using -Wl,--{start|end}-group around the Clang libs; this is
# because there are circular dependencies that make the correct order difficult
# to specify and maintain. The linker group options make the linking somewhat
# slower, but IMHO they're still perfectly fine for tools that link with Clang.
CLANG_LIBS := \
	-Wl,--start-group \
	-lclangAST \
	-lclangAnalysis \
	-lclangBasic \
	-lclangDriver \
	-lclangEdit \
	-lclangFrontend \
	-lclangFrontendTool \
	-lclangLex \
	-lclangParse \
	-lclangSema \
	-lclangEdit \
	-lclangASTMatchers \
	-lclangRewrite \
	-lclangRewriteFrontend \
	-lclangStaticAnalyzerFrontend \
	-lclangStaticAnalyzerCheckers \
	-lclangStaticAnalyzerCore \
	-lclangSerialization \
	-lclangToolingCore \
	-lclangTooling \
	-Wl,--end-group

# Internal paths in this project: where to find sources, and where to put
# build artifacts.
SRC_DIR := src
BUILDDIR := build

.PHONY: all
all: make_builddir \
	emit_build_config \
	$(BUILDDIR)/add_mc2_annotations 

.PHONY: test
test: emit_build_config
	python3 test/all_tests.py

.PHONY: emit_build_config
emit_build_config: make_builddir
	@echo $(LLVM_BIN_PATH) > $(BUILDDIR)/_build_config

.PHONY: make_builddir
make_builddir:
	@test -d $(BUILDDIR) || mkdir $(BUILDDIR)

$(BUILDDIR)/add_mc2_annotations: $(SRC_DIR)/add_mc2_annotations.cpp
	$(CXX) $(CXXFLAGS) $(LLVM_CXXFLAGS) $(CLANG_INCLUDES) $^ \
		$(CLANG_LIBS) $(LLVM_LDFLAGS) -o $@

.PHONY: clean
clean:
	rm -rf $(BUILDDIR)/* *.dot test/*.pyc test/__pycache__