sys-libs/netbsd-csu: Package crt{begin,end} from NetBSD, for clang

1 files changed, 66 insertions, 0 deletions

diff --git a/sys-libs/netbsd-csu/netbsd-csu-7.1.ebuild b/sys-libs/netbsd-csu/netbsd-csu-7.1.ebuild
new file mode 100644
index 000000000000..9586ae34bedc
--- /dev/null
+++ b/sys-libs/netbsd-csu/netbsd-csu-7.1.ebuild
@@ -0,0 +1,66 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit bsdmk multilib-minimal toolchain-funcs
+
+DESCRIPTION="crtbegin.o/crtend.o from NetBSD CSU for GCC-free toolchain"
+HOMEPAGE="http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/csu/"
+SRC_URI="https://dev.gentoo.org/~mgorny/dist/${P}.tar.xz"
+
+LICENSE="BSD-2"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+IUSE=""
+
+DEPEND="app-arch/xz-utils"
+
+S=${WORKDIR}/${P}/lib/csu
+
+src_prepare() {
+	default
+	multilib_copy_sources
+}
+
+multilib_src_compile() {
+	local inc_arch=${ABI:-${ARCH}}
+
+	# rewrite ARCH to match NetBSD includes
+	case "${inc_arch}" in
+		x86) inc_arch=i386;;
+		# x32 seems to be equivalent to amd64 as far as we're concerned
+		x32) inc_arch=amd64;;
+		arm64) inc_arch=aarch64;;
+	esac
+
+	# we need arch-specific headers for some assembler macros
+	if [[ ! -d ${WORKDIR}/${P}/sys/arch/${inc_arch} ]]; then
+		die "Unexpected ABI/ARCH: ${inc_arch}, please report"
+	fi
+	ln -s "${WORKDIR}/${P}/sys/arch/${inc_arch}/include" common/machine || die
+
+	local opts=(
+		CC="$(tc-getCC)"
+		OBJCOPY="$(tc-getOBJCOPY)"
+
+		MKPIC=yes
+		MKSTRIPIDENT=no
+	)
+	# rewrite MACHINE_ARCH to match names used in CSU
+	case "${inc_arch}" in
+		amd64) opts+=( MACHINE_ARCH=x86_64 );;
+		*) opts+=( MACHINE_ARCH="${inc_arch}" );;
+	esac
+
+	# we only need those files; crt1 and friends are provided by libc
+	opts+=( crtbegin.o crtbeginS.o crtend.o )
+
+	bsdmk_src_compile "${opts[@]}"
+}
+
+multilib_src_install() {
+	dolib crtbegin.o crtbeginS.o crtend.o
+	dosym crtbegin.o "/usr/$(get_libdir)/crtbeginT.o"
+	dosym crtend.o "/usr/$(get_libdir)/crtendS.o"
+}