CC ?= cc
VEXE ?= ./v
VFLAGS ?=
CFLAGS ?=
LDFLAGS ?=

# Portable VC snapshots do not embed V3. Keep their v1 executable on the full
# compatibility compiler path even when the generated C is built on a V3 host.
VC_BOOTSTRAP_DEFINE = -DCUSTOM_DEFINE_v1_fallback

all: download_vc v

.PHONY: all check download_vc install v v1

download_vc:
	@set -e; \
	if [ -f vc/v.c ]; then \
		if command -v git >/dev/null 2>&1; then \
			git -C vc/ pull --rebase; \
		else \
			echo "git not found; using existing vc/v.c"; \
		fi; \
	else \
		if command -v git >/dev/null 2>&1; then \
			git clone --filter=blob:none https://github.com/vlang/vc vc/; \
		else \
			echo "git is required to download vc/. Please install git or provide vc/v.c."; \
			exit 1; \
		fi; \
	fi

v:
	@set -e; \
	sys=`uname -s 2>/dev/null || echo unknown`; \
	arch=`uname -m 2>/dev/null || echo unknown`; \
	if [ "`getconf LONG_BIT 2>/dev/null`" = 32 ]; then \
		case "$$arch" in \
			aarch64|arm64|armv8*) arch=armv7l;; \
			x86_64|amd64) arch=i686;; \
		esac; \
	fi; \
	set -- $(CFLAGS); \
	ccflags=; \
	unsafe_o=0; \
	for arg do \
		case "$$arg" in \
			-O|-O0|-O1) \
				ccflags="$$ccflags $$arg"; \
				;; \
			-O*) \
				ccflags="$$ccflags $$arg"; \
				unsafe_o=1; \
				;; \
			*) \
				ccflags="$$ccflags $$arg"; \
				;; \
		esac; \
	done; \
	ccflags=$${ccflags# }; \
	bootstrap_ccflags=$$ccflags; \
	set -- $(LDFLAGS); \
	ldflags=; \
	for arg do \
		ldflags="$$ldflags $$arg"; \
	done; \
	ldflags=$${ldflags# }; \
	case "$$sys" in \
		Linux) \
			case "$$arch" in \
				arm*) \
					ldflags="$$ldflags -latomic"; \
					;; \
			esac; \
			;; \
		FreeBSD|NetBSD|OpenBSD) \
			ldflags="$$ldflags -lexecinfo"; \
			;; \
	esac; \
	ccflags=$${ccflags# }; \
	ldflags=$${ldflags# }; \
	if [ "$$sys" = Linux ]; then \
		case "$$arch" in \
			arm64|aarch64) \
				if [ $$unsafe_o -eq 1 ]; then \
					set -- $$ccflags; \
					bootstrap_ccflags=; \
					for arg do \
						case "$$arg" in \
							-O|-O0|-O1) \
								bootstrap_ccflags="$$bootstrap_ccflags $$arg"; \
								;; \
							-O*) \
								bootstrap_ccflags="$$bootstrap_ccflags -O1"; \
								;; \
							*) \
								bootstrap_ccflags="$$bootstrap_ccflags $$arg"; \
								;; \
						esac; \
					done; \
					bootstrap_ccflags=$${bootstrap_ccflags# }; \
				fi; \
				;; \
		esac; \
	fi; \
	bootstrap_gcflags="-gc none"; \
	case " $(VFLAGS) " in \
		*" -gc "*|*" -gc="*) bootstrap_gcflags="";; \
	esac; \
	bootstrap_ccompiler=; \
	case " $(VFLAGS) " in \
		*" -cc "*|*" -cc="*) ;; \
		*) \
			case "$$sys" in \
				Linux|FreeBSD|NetBSD|OpenBSD|DragonFly) \
					case "$$arch" in \
						arm*|aarch64) bootstrap_ccompiler="$(CC)";; \
					esac; \
					;; \
			esac; \
			;; \
	esac; \
	sh cmd/tools/vc_compat.sh vc/v.c $(CC) $$bootstrap_ccflags $(VC_BOOTSTRAP_DEFINE) -std=gnu11 -w -o v1 -- -lm -lpthread $$ldflags || sh cmd/tools/cc_compilation_failed_non_windows.sh; \
	set -- ./v1 -no-parallel -o v2 $$bootstrap_gcflags $(VFLAGS); \
	if [ -n "$$bootstrap_ccompiler" ]; then \
		set -- "$$@" -cc "$$bootstrap_ccompiler"; \
	fi; \
	if [ -n "$$bootstrap_ccflags" ]; then \
		set -- "$$@" -cflags "$$bootstrap_ccflags"; \
	fi; \
	if [ -n "$$ldflags" ]; then \
		set -- "$$@" -ldflags "$$ldflags"; \
	fi; \
	set -- "$$@" cmd/v; \
	"$$@"; \
	set -- ./v2 -o v $$bootstrap_gcflags $(VFLAGS); \
	if [ -n "$$bootstrap_ccompiler" ]; then \
		set -- "$$@" -cc "$$bootstrap_ccompiler"; \
	fi; \
	if [ -n "$$ccflags" ]; then \
		set -- "$$@" -cflags "$$ccflags"; \
	fi; \
	if [ -n "$$ldflags" ]; then \
		set -- "$$@" -ldflags "$$ldflags"; \
	fi; \
	set -- "$$@" cmd/v; \
	"$$@"; \
	rm -rf v1 v2; \
	./v -new-compiler run ./cmd/tools/detect_tcc.v; \
	echo "V has been successfully built"; \
	./v version; \
	./v -new-compiler run .github/problem-matchers/register_all.vsh; \
	cache_gcflags=; \
	if [ ! -f thirdparty/tcc/lib/libgc.a ] && [ ! -f thirdparty/tcc/lib/libgc.dylib ]; then \
		cache_gcflags='-gc none'; \
	fi; \
	./v $$cache_gcflags $(VFLAGS) -new-compiler run cmd/tools/cache_basic_modules.v; \
	./v $$cache_gcflags $(VFLAGS) -new-compiler cmd/tools/cache_basic_modules_test.v

v1:
	@set -e; \
	sys=`uname -s 2>/dev/null || echo unknown`; \
	arch=`uname -m 2>/dev/null || echo unknown`; \
	if [ "`getconf LONG_BIT 2>/dev/null`" = 32 ]; then \
		case "$$arch" in \
			aarch64|arm64|armv8*) arch=armv7l;; \
			x86_64|amd64) arch=i686;; \
		esac; \
	fi; \
	set -- $(CFLAGS); \
	bootstrap_ccflags=; \
	unsafe_o=0; \
	for arg do \
		case "$$arg" in \
			-O|-O0|-O1) bootstrap_ccflags="$$bootstrap_ccflags $$arg";; \
			-O*) bootstrap_ccflags="$$bootstrap_ccflags $$arg"; unsafe_o=1;; \
			*) bootstrap_ccflags="$$bootstrap_ccflags $$arg";; \
		esac; \
	done; \
	bootstrap_ccflags=$${bootstrap_ccflags# }; \
	set -- $(LDFLAGS); \
	ldflags=; \
	for arg do ldflags="$$ldflags $$arg"; done; \
	ldflags=$${ldflags# }; \
	case "$$sys" in \
		Linux) case "$$arch" in arm*) ldflags="$$ldflags -latomic";; esac;; \
		FreeBSD|NetBSD|OpenBSD) ldflags="$$ldflags -lexecinfo";; \
	esac; \
	ldflags=$${ldflags# }; \
	if [ "$$sys" = Linux ]; then \
		case "$$arch" in \
			arm64|aarch64) \
				if [ $$unsafe_o -eq 1 ]; then \
					set -- $$bootstrap_ccflags; \
					bootstrap_ccflags=; \
					for arg do \
						case "$$arg" in \
							-O|-O0|-O1) bootstrap_ccflags="$$bootstrap_ccflags $$arg";; \
							-O*) bootstrap_ccflags="$$bootstrap_ccflags -O1";; \
							*) bootstrap_ccflags="$$bootstrap_ccflags $$arg";; \
						esac; \
					done; \
					bootstrap_ccflags=$${bootstrap_ccflags# }; \
				fi;; \
		esac; \
	fi; \
	CC='$(CC)' OLDV_CCOPTIONS='$(CPPFLAGS) '"$$bootstrap_ccflags" \
		OLDV_LDFLAGS="$$ldflags" \
		cmd/tools/install_v1_fallback.sh '$(VEXE)' './v1_fallback'; \
	echo "Built V1 compatibility compiler: ./v1_fallback"

check:
	./v test-all

install:
	@echo 'Please use `sudo ./v symlink` instead, or manually add the current directory to your PATH.'