Zig from source

Makefile

LLVM_PROJECT=llvm-project-14

LLVM_BASE=Downloads/$(LLVM_PROJECT)
LLVM_INST=$(LLVM_BASE)/local

ZIG2 := $(shell realpath stage2/bin/zig)
ZIG3 := $(shell realpath stage3/bin/zig)
ZIG4 := $(shell realpath stage4/bin/zig)

build Downloads:
	mkdir $@

build/Makefile: build
	INST_PREFIX=`realpath $(LLVM_INST)` ;\
	echo "llvm should be at $$INST_PREFIX" ;\
	cd build ; \
	cmake .. -DCMAKE_PREFIX_PATH=$$INST_PREFIX

LLVM_TOOLS=$(LLVM_INST)/bin/llvc $(LLVM_INST)/bin/lld $(LLVM_INST)/bin/clang

.PHONY: stage1
build/stage1/bin/zig stage1: build/Makefile $(LLVM_TOOLS)
	cd build ; \
	make -j6 install


LOG_OPTS=--verbose-link --verbose-air
# Major "--debug-log" targets are: compilation, module, sema, codegen, and link
#LOG_OPTS=-Dlog=true --debug-log sema
#LOG_OPTS=

.PHONY: stage2
stage2/bin/zig stage2: build/stage1/bin/zig
	./build/stage1/bin/zig build -p stage2 -Denable-llvm

stage3/bin/zig stage3: stage2/bin/zig
	./stage2/bin/zig build -p stage3 -Denable-llvm -Dconfig_h=build/config.h $(LOG_OPTS) >stage3_air.log 2>&1

stage4/bin/zig stage4: stage3/bin/zig
	./stage3/bin/zig build -p stage4 -Denable-llvm -Dconfig_h=build/config.h $(LOG_OPTS) >stage4_air.log 2>&1

# not really necessary, but another datapoint for reproducible build comparison
stage5/bin/zig stage5: stage4/bin/zig
	rm -rf zig-cache ;\
	./stage4/bin/zig build -p stage5 -Denable-llvm -Dconfig_h=build/config.h $(LOG_OPTS) >stage5_air.log 2>&1


airdiff: stage34_air.diff
stage34_air.diff: stage4
	diff stage[34]_air.log > stage34_air.diff


zirs:
	cd test/cases ;\
	for z in *.zig ; do \
	    $(ZIG3) build-exe -Denable-llvm --verbose-air $z  >$${z}.air3 ; \
	    $(ZIG4) build-exe -Denable-llvm --verbose-air $z  >$${z}.air4 ; \
	done



# local llvm build

$(LLVM_BASE): Downloads
	cd Downloads ; \
	git clone --depth 1 --branch release/14.x https://github.com/llvm/llvm-project $(LLVM_PROJECT)

llvc: $(LLVM_INST)/bin/llvc
$(LLVM_INST)/bin/llvc: $(LLVM_BASE)
	INST_PREFIX=`realpath $(LLVM_INST)` ;\
	cd $</llvm ; \
	mkdir -p build-release ; \
	cd build-release ; \
	cmake .. -DCMAKE_INSTALL_PREFIX=$$INST_PREFIX -DCMAKE_PREFIX_PATH=$$INST_PREFIX -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_LIBXML2=OFF -G Ninja -DLLVM_PARALLEL_LINK_JOBS=1 ; \
	ninja install

lld: $(LLVM_INST)/bin/lld
$(LLVM_INST)/bin/lld: $(LLVM_BASE)
	INST_PREFIX=`realpath $(LLVM_INST)` ;\
	cd $</lld ; \
	mkdir -p build-release ; \
	cd build-release ; \
	cmake .. -DCMAKE_INSTALL_PREFIX=$$INST_PREFIX -DCMAKE_PREFIX_PATH=$$INST_PREFIX -DCMAKE_BUILD_TYPE=Release -G Ninja -DLLVM_PARALLEL_LINK_JOBS=1 -DCMAKE_CXX_STANDARD=17 ;\
	ninja install

clang: $(LLVM_INST)/bin/clang
$(LLVM_INST)/bin/clang: $(LLVM_BASE)
	INST_PREFIX=`realpath $(LLVM_INST)` ;\
	cd $</clang ; \
	mkdir -p build-release ; \
	cd build-release ; \
	cmake .. -DCMAKE_INSTALL_PREFIX=$$INST_PREFIX -DCMAKE_PREFIX_PATH=$$INST_PREFIX -DCMAKE_BUILD_TYPE=Release -G Ninja -DLLVM_PARALLEL_LINK_JOBS=1 ;\
	ninja install

.PHONY: llvm-tools
llvm-tools: $(LLVM_TOOLS)


clean-zig:
	rm -rf build zig-cache ~/.cache/zig stage[12345]

clean-llvm:
	rm -rf $(LLVM_BASE)/{llvm,lld,clang}/build-release $(LLVM_INST)

clean-all-llvm:
	rm -rf Downloads

clean-all: clean-zig clean-all-llvm