sys-libs/musl: prefixify build

Currently building a musl libc toolchain inside of gentoo prefix with
crossdev will fail, due to installing files outside of the prefix. Added
${EPREFIX} and ${ED} where apropriate fixed this issue.

Tested in a prefix with toolchain x86_64-gentoo-linux-musl, and tested on bare
gentoo with x86_64-gentoo-linux-musl.

Acked-by: blueness
Package-Manager: Portage-2.3.19, Repoman-2.3.6
Signed-off-by: Marty E. Plummer <hanetzer@protonmail.com>

Closes: https://bugs.gentoo.org/642612
Closes: https://github.com/gentoo/gentoo/pull/6678

2 files changed, 120 insertions, 2 deletions

diff --git a/sys-libs/musl/musl-1.1.18-r1.ebuild b/sys-libs/musl/musl-1.1.18-r1.ebuild
new file mode 100644
index 000000000000..c4a1c90aaf5a
--- /dev/null
+++ b/sys-libs/musl/musl-1.1.18-r1.ebuild
@@ -0,0 +1,118 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit eutils flag-o-matic multilib toolchain-funcs
+if [[ ${PV} == "9999" ]] ; then
+	EGIT_REPO_URI="git://git.musl-libc.org/musl"
+	inherit git-r3
+	SRC_URI="
+	https://dev.gentoo.org/~blueness/musl-misc/getconf.c
+	https://dev.gentoo.org/~blueness/musl-misc/getent.c
+	https://dev.gentoo.org/~blueness/musl-misc/iconv.c"
+	KEYWORDS=""
+else
+	SRC_URI="http://www.musl-libc.org/releases/${P}.tar.gz
+	https://dev.gentoo.org/~blueness/musl-misc/getconf.c
+	https://dev.gentoo.org/~blueness/musl-misc/getent.c
+	https://dev.gentoo.org/~blueness/musl-misc/iconv.c"
+	KEYWORDS="-* ~amd64 ~arm ~mips ~ppc ~x86"
+fi
+
+export CBUILD=${CBUILD:-${CHOST}}
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} ]] ; then
+	if [[ ${CATEGORY} == cross-* ]] ; then
+		export CTARGET=${CATEGORY#cross-}
+	fi
+fi
+
+DESCRIPTION="Light, fast and simple C library focused on standards-conformance and safety"
+HOMEPAGE="http://www.musl-libc.org/"
+LICENSE="MIT LGPL-2 GPL-2"
+SLOT="0"
+IUSE="crosscompile_opts_headers-only"
+
+QA_SONAME="/usr/lib/libc.so"
+QA_DT_NEEDED="/usr/lib/libc.so"
+
+is_crosscompile() {
+	[[ ${CHOST} != ${CTARGET} ]]
+}
+
+just_headers() {
+	use crosscompile_opts_headers-only && is_crosscompile
+}
+
+pkg_setup() {
+	if [ ${CTARGET} == ${CHOST} ] ; then
+		case ${CHOST} in
+		*-musl*) ;;
+		*) die "Use sys-devel/crossdev to build a musl toolchain" ;;
+		esac
+	fi
+}
+
+src_configure() {
+	tc-getCC ${CTARGET}
+	just_headers && export CC=true
+
+	local sysroot
+	is_crosscompile && sysroot="${EPREFIX}"/usr/${CTARGET}
+	./configure \
+		--target=${CTARGET} \
+		--prefix=${sysroot}/usr \
+		--syslibdir=${sysroot}/lib \
+		--disable-gcc-wrapper || die
+}
+
+src_compile() {
+	emake obj/include/bits/alltypes.h
+	just_headers && return 0
+
+	emake
+	if [[ ${CATEGORY} != cross-* ]] ; then
+		$(tc-getCC) ${CFLAGS} "${DISTDIR}"/getconf.c -o "${T}"/getconf || die
+		$(tc-getCC) ${CFLAGS} "${DISTDIR}"/getent.c -o "${T}"/getent || die
+		$(tc-getCC) ${CFLAGS} "${DISTDIR}"/iconv.c -o "${T}"/iconv || die
+	fi
+}
+
+src_install() {
+	local target="install"
+	just_headers && target="install-headers"
+	emake DESTDIR="${D}" ${target}
+	just_headers && return 0
+
+	# musl provides ldd via a sym link to its ld.so
+	local sysroot
+	is_crosscompile && sysroot=/usr/${CTARGET}
+	local ldso=$(basename "${ED}"${sysroot}/lib/ld-musl-*)
+	dosym ${sysroot}/lib/${ldso} ${sysroot}/usr/bin/ldd
+
+	if [[ ${CATEGORY} != cross-* ]] ; then
+		local arch=$("${D}"usr/lib/libc.so 2>&1 | sed -n '1s/^musl libc (\(.*\))$/\1/p')
+		[[ -e "${D}"/lib/ld-musl-${arch}.so.1 ]] || die
+		cp "${FILESDIR}"/ldconfig.in "${T}" || die
+		sed -e "s|@@ARCH@@|${arch}|" "${T}"/ldconfig.in > "${T}"/ldconfig || die
+		into /
+		dosbin "${T}"/ldconfig
+		into /usr
+		dobin "${T}"/getconf
+		dobin "${T}"/getent
+		dobin "${T}"/iconv
+		echo 'LDPATH="include ld.so.conf.d/*.conf"' > "${T}"/00musl || die
+		doenvd "${T}"/00musl || die
+	fi
+}
+
+pkg_postinst() {
+	is_crosscompile && return 0
+
+	[ "${ROOT}" != "/" ] && return 0
+
+	ldconfig || die
+	# reload init ...
+	/sbin/telinit U 2>/dev/null
+}
diff --git a/sys-libs/musl/musl-9999.ebuild b/sys-libs/musl/musl-9999.ebuild
index 9e0e184d6562..c4a1c90aaf5a 100644
--- a/sys-libs/musl/musl-9999.ebuild
+++ b/sys-libs/musl/musl-9999.ebuild
@@ -59,7 +59,7 @@ src_configure() {
 	just_headers && export CC=true
 
 	local sysroot
-	is_crosscompile && sysroot=/usr/${CTARGET}
+	is_crosscompile && sysroot="${EPREFIX}"/usr/${CTARGET}
 	./configure \
 		--target=${CTARGET} \
 		--prefix=${sysroot}/usr \
@@ -88,7 +88,7 @@ src_install() {
 	# musl provides ldd via a sym link to its ld.so
 	local sysroot
 	is_crosscompile && sysroot=/usr/${CTARGET}
-	local ldso=$(basename "${D}"${sysroot}/lib/ld-musl-*)
+	local ldso=$(basename "${ED}"${sysroot}/lib/ld-musl-*)
 	dosym ${sysroot}/lib/${ldso} ${sysroot}/usr/bin/ldd
 
 	if [[ ${CATEGORY} != cross-* ]] ; then