build/pkg/musl/build

VERSION="1.1.20"
SRCDIR="musl-$VERSION"
TARBALL="$SRCDIR.tar.gz"
URL="https://www.musl-libc.org/releases"
SHA256SUM="44be8771d0e6c6b5f82dd15662eb2957c9a3173a19a8b49966ac0542bbd40d61"
DEPENDS="tc-gcc1 linux-dev fortify-headers tc-pkgtool"
SUBPKG="libc libc-dev"

prepare() {
	return
}

build() {
	local cflags="-O2 -Os"
	local ldflags=""

	if [ "x$TC_HARDENING" = "xyes" ]; then
		cflags="$cflags -fPIE -fPIC -fstack-protector-all"
		ldflags="$ldflags -z noexecstack -z relro -z now"
	fi

	${TARGET}-gcc -c "$SCRIPTDIR/pkg/$PKGNAME/__stack_chk_fail_local.c" -o __stack_chk_fail_local.o
	${TARGET}-ar r libssp_nonshared.a __stack_chk_fail_local.o

	CFLAGS="$cflags" LDFLAGS="$ldflags" \
	CROSS_COMPILE="${TARGET}-" $1/configure --prefix=/ --target="$TARGET"
	CROSS_COMPILE="${TARGET}-" make -j $NUMJOBS
}

deploy() {
	local INPUT="$1"
	local MUSL_CPU=""

	case "$TARGET" in
	i*86-*)
		MUSL_CPU="i386"
		;;
	x86_64-*)
		MUSL_CPU="x86_64"
		;;
	arm-*-*hf)
		MUSL_CPU="armhf"
		;;
	arm-*)
		MUSL_CPU="arm"
		;;
	*)
		echo "don't know how to map $TARGET to Musl arch"
		exit 1
		;;
	esac

	DESTDIR="$PKGDEPLOYDIR" make install-headers
	DESTDIR="$PKGDEPLOYDIR" make install-libs

	cat_file_merge "LDPATH" > "$PKGDEPLOYDIR/LDPATH"
	cp libssp_nonshared.a "$PKGDEPLOYDIR/lib"

	cp $SCRIPTDIR/pkg/$PKGNAME/*.{desc,files} "$PKGDEPLOYDIR"

cat > "$PKGDEPLOYDIR/libc.files" <<_EOF
dir lib 0755 0 0
dir etc 0755 0 0
file lib/libc.so 0755 0 0 $PKGDEPLOYDIR/lib/libc.so
slink lib/ld-musl-${MUSL_CPU}.so.1 0777 0 0 libc.so
file etc/ld-musl-${MUSL_CPU}.path 0644 0 0 $PKGDEPLOYDIR/LDPATH
_EOF
}

check_update() {
	curl --silent -L "$URL" | grep -o ">musl-[0-9.]*tar.gz<" | \
	    sed 's/>musl-//g' | sed 's/.tar.gz<//g' | \
	    verson_find_greatest "$VERSION"
}