CC ?= cc
VFLAGS ?=
CFLAGS ?=
LDFLAGS ?=

all: download_vc v

.PHONY: all check download_vc install v

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`; \
    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=$${bootstrap_ccflags# }; \
                fi; \
                ;; \
        esac; \
    fi; \
    bootstrap_gcflags="-gc none"; \
    case " $(VFLAGS) " in \
        *" -gc "*|*" -gc="*) bootstrap_gcflags="";; \
    esac; \
    $(CC) $$bootstrap_ccflags -std=gnu11 -w -o v1 vc/v.c -lm -lpthread $$ldflags || cmd/tools/cc_compilation_failed_non_windows.sh; \
    set -- ./v1 -no-parallel -o v2 $$bootstrap_gcflags $(VFLAGS); \
    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 $$bootstrap_gcflags $(VFLAGS); \
    if [ -n "$$ccflags" ]; then \
        set -- "$$@" -cflags "$$ccflags"; \
    fi; \
    if [ -n "$$ldflags" ]; then \
        set -- "$$@" -ldflags "$$ldflags"; \
    fi; \
    set -- "$$@" cmd/v; \
    "$$@"; \
    rm -rf v1 v2; \
    ./v run ./cmd/tools/detect_tcc.v; \
    echo "V has been successfully built"; \
    ./v version; \
    ./v run .github/problem-matchers/register_all.vsh

check:
    ./v test-all

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