# SPDX-License-Identifier: GPL-2.0-or-later
# musl libc — MIT-licensed: https://musl.libc.org/
#
# Installs into $(PREFIX) (= build/ports/musl/prefix), which port.mk exports
# to every other port as $(MUSL). Nothing is written into this directory.

include ../mk/port.mk

MUSL_VERSION := 1.2.5
MUSL_URL     := https://musl.libc.org/releases/musl-$(MUSL_VERSION).tar.gz
MUSL_SHA256  := a9a118bbe84d8764da0ea0d28b3ab3fae8477fc7e4085d90102b8596fc7c75e4

TARBALL := $(DISTDIR)/musl-$(MUSL_VERSION).tar.gz

$(TARBALL): | $(DISTDIR)
	curl -fsSL -o $@ $(MUSL_URL)
	sh $(SHA256CHECK) "$(MUSL_SHA256)" "$@"

download: $(TARBALL)

$(SRCDIR): $(TARBALL)
	mkdir -p $(PORTDIR)
	tar -xzf $< -C $(PORTDIR)
	mv $(PORTDIR)/musl-$(MUSL_VERSION) $@

# $(SRCDIR) is order-only (|) on purpose. The stamp lives INSIDE $(SRCDIR),
# so creating it bumps that directory's mtime — making the directory forever
# newer than the stamp it contains, and re-running this rule on every single
# build. The second run then fails, because the patch does not apply twice.
$(SRCDIR)/.patched: patches/0001-schos-tls.patch | $(SRCDIR)
	cd $(SRCDIR) && patch -p1 < $(CURDIR)/patches/0001-schos-tls.patch
	touch $@

$(BUILDDIR)/config.mak: $(SRCDIR)/.patched
	mkdir -p $(BUILDDIR)
	cd $(BUILDDIR) && $(SRCDIR)/configure \
		--prefix=$(PREFIX) \
		--disable-shared \
		CC=$(CC) \
		CFLAGS="-D__SCHOS__ -fno-stack-protector"

$(BUILDDIR)/lib/libc.a: $(BUILDDIR)/config.mak
	$(MAKE) -C $(BUILDDIR)

$(PREFIX)/lib/libc.a: $(BUILDDIR)/lib/libc.a
	$(MAKE) -C $(BUILDDIR) install

install: $(PREFIX)/lib/libc.a

clean:
	rm -rf $(PORTDIR)

distclean: clean
	rm -f $(TARBALL)