dev-lang/ghc: get rid of ncurses runtime dependency, bug #557478

Recently gentoo updated ncurses to sys-libs/ncurses-6.0.
It changed ABI from libncursesw.so.5 to libncursesw.so.6
in an incompatible way.

The change disables ncurses backend for haskeline for
booter binary (USE=ghcmakebinary).

Bug: https://bugs.gentoo.org/show_bug.cgi?id=557478

Package-Manager: portage-2.2.20

2 files changed, 653 insertions, 0 deletions

diff --git a/dev-lang/ghc/Manifest b/dev-lang/ghc/Manifest
index 7406de315e95..24c2cab2819b 100644
--- a/dev-lang/ghc/Manifest
+++ b/dev-lang/ghc/Manifest
@@ -6,6 +6,8 @@ DIST ghc-7.8.3-src.tar.xz 9160092 SHA256 b0cd96a549ba3b5e512847a4a8cd1a3174e4b2b
 DIST ghc-7.8.4-ia64-CLOSUREs-regenerated.patch.gz 13268 SHA256 3bdff22e654aee6f942d43edf1bf6cf70404c0152c4fcf89276f10d2c4c5b4b9 SHA512 a655713e06324b56f0041edf70837487e296d28e6f3ee35fe116b9938765aaf3469d25e92645e0940655ed3607dff27d3826fe0f995c84e81b51bfc956816e7d WHIRLPOOL d2cb53bdc6debc0278d554168ea3ab22b0fd8314adac81444637278a92d21b766280fedfb4b7d1b4540c7381c7962dec6b13a799ab2fee4d456fe2875d5c6a5b
 DIST ghc-7.8.4-src.tar.bz2 10600755 SHA256 59e3bd514a1820cc1c03e1808282205c0b8518369acae12645ceaf839e6f114b SHA512 079a53891d8ebd8d9b88da96170e60981608a619f8282e4b7948f35244e99bd87277649ac7fcebc227a61a4d21960db8d5e5b9e92f2c69c82d8d68d7fd0a41d3 WHIRLPOOL a9be7641adbd237ed6e0f644c312e655e98be9566097aee5e2c0022e8756d5b2236e42dd86d76c638a001b5ca3f67307e89ec0cd003a92cd112a5d6d3e3d8467
 DIST ghc-bin-7.10.2-amd64.tbz2 112028560 SHA256 536297ac402da44ec1aafb1a937960883d12d192db16715ca34ab6469773a4c7 SHA512 207d8032c99d52bf4215ddeea2dbcd5816bb8d4caf2c3c31190e3ca92b49667d98a4f97aaf4cd6b40090f150854d520f75b5420dfe1ade7f036cf35d3dcb5100 WHIRLPOOL 8e43956a61c2c0fead242e3b179cde4918c04f3db7dbb27cc986f00f981261d98028ead82548b87d183d8da928635d5db4aa62ff1161f4077e5370483530a316
+DIST ghc-bin-7.10.2-r1-amd64.tbz2 111915962 SHA256 3c5972b69be650bc2d3a07ff8a6be97a2d8fd07387aee155183960ebcd7bd60c SHA512 e87c7c177cbfac7e8206c3ad94ab36d568d3b294311b60df5db50e3c6d46e0b5fae77b8b74701b6920f419c0bc7f763fe478760f14b00c1fc18fb79e9b17bb4f WHIRLPOOL b5be3ef924d729e77626ce69859ffa8952e1f5053a36672cef5713aa60b7167ab9d3886cc8052cacfdb6756d50db444b3f80bca77a932719a16cc9b4583e8319
+DIST ghc-bin-7.10.2-r1-x86.tbz2 113566669 SHA256 d0ff86c34d009e7980d3b1ea85b24dfe3854d85cf2aece36dbad38078283a382 SHA512 a2bfef656603db15147399424733f1f97867b0ad883880ee8912bbbad7fe42646caf6023a17653119ad7ea246ffe3f2ecff5b924c6912c41fb601d51c032c2ce WHIRLPOOL 2f2d4accbbaa3202754a9463dc321d0b830bc4710db36c5ca4dcf3ae00882f34db16bf613ba52712671aee69bb5ae2747d12a29a520a29fd057c86ec20e53286
 DIST ghc-bin-7.10.2-x86.tbz2 113900477 SHA256 eefb7a3002e3dcdd6d936b2b2826eadf3cd100352babad4c9a355b944064240a SHA512 61dae4b9c80bfef6b1e0550c77b70f25d11f4a9fbe3b57d6c4ad451b4b584884432405d39dc32b9f85f3a5ad9d02657356ae0ebd99518848f3d330314c74b595 WHIRLPOOL da0d7eb62d2ee2aeb80a3f495da2ff123e29151b7517fbcd212f83ab3722638f10019511f4f237e8e001c68dd957ed2817fb0f1a2b42c2710239343f1d801496
 DIST ghc-bin-7.4.2-alpha.tbz2 130483507 SHA256 cd8e72e569574f137bf10fcdb4337bb0dc320deb2a2c4d72529a821735c53ae6 SHA512 6fb99dea706965afa60f4aeb68da3da1c69dda477f5fcfb4e67b73d75b78583193148ce9f623a356679a57f1a740f8010f28a22f08e56ace50f3fcd42142f83f WHIRLPOOL e5ec69ab24dc963ac709f13928c0e35931d5d50ca6b21dfb0aa79f9088c0ce1196b64bb4d9668e35d73dcdf9e2df9c3da59c95eaf3db8b793a6bb65b1f4ba6c0
 DIST ghc-bin-7.4.2-amd64-stable-glibc.tbz2 93139900 SHA256 f06dff00585cc1a8ecc8ac29aeca7fdc601d272eed29d7613f7a2f2924cad585 SHA512 9b725f2613dd9013851a16eaea4000ea424c51cbafa97d3860f120fdb9936247f8c65208775a80a2f49b74946ddda2e843a54dec00b78c521197374aa3dd2d50 WHIRLPOOL 9e2630b1de40a059c324be38a1fe68b16ea484bc7afc2a397ea05192263d1964aed1d29fde543622ceab12ed2df111204576fdc72b7e35b2bbf9c6b9519901d1
diff --git a/dev-lang/ghc/ghc-7.10.2-r1.ebuild b/dev-lang/ghc/ghc-7.10.2-r1.ebuild
new file mode 100644
index 000000000000..d830880c390d
--- /dev/null
+++ b/dev-lang/ghc/ghc-7.10.2-r1.ebuild
@@ -0,0 +1,651 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+# to make make a crosscompiler use crossdev and symlink ghc tree into
+# cross overlay. result would look like 'cross-sparc-unknown-linux-gnu/ghc'
+#
+# 'CTARGET' definition and 'is_crosscompile' are taken from 'toolchain.eclass'
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} = ${CHOST} ]] ; then
+	if [[ ${CATEGORY/cross-} != ${CATEGORY} ]] ; then
+		export CTARGET=${CATEGORY/cross-}
+	fi
+fi
+
+inherit autotools bash-completion-r1 eutils flag-o-matic ghc-package
+inherit multilib pax-utils toolchain-funcs versionator
+
+DESCRIPTION="The Glasgow Haskell Compiler"
+HOMEPAGE="http://www.haskell.org/ghc/"
+
+# we don't have any binaries yet
+arch_binaries=""
+
+# sorted!
+#arch_binaries="$arch_binaries alpha? ( http://code.haskell.org/~slyfox/ghc-alpha/ghc-bin-${PV}-alpha.tbz2 )"
+#arch_binaries="$arch_binaries arm? ( http://code.haskell.org/~slyfox/ghc-arm/ghc-bin-${PV}-arm.tbz2 )"
+arch_binaries="$arch_binaries amd64? ( http://code.haskell.org/~slyfox/ghc-amd64/ghc-bin-${PVR}-amd64.tbz2 )"
+#arch_binaries="$arch_binaries ia64?  ( http://code.haskell.org/~slyfox/ghc-ia64/ghc-bin-${PV}-ia64-fixed-fiw.tbz2 )"
+#arch_binaries="$arch_binaries ppc? ( http://code.haskell.org/~slyfox/ghc-ppc/ghc-bin-${PV}-ppc.tbz2 )"
+#arch_binaries="$arch_binaries ppc64? ( http://code.haskell.org/~slyfox/ghc-ppc64/ghc-bin-${PV}-ppc64.tbz2 )"
+#arch_binaries="$arch_binaries sparc? ( http://code.haskell.org/~slyfox/ghc-sparc/ghc-bin-${PV}-sparc.tbz2 )"
+arch_binaries="$arch_binaries x86? ( http://code.haskell.org/~slyfox/ghc-x86/ghc-bin-${PVR}-x86.tbz2 )"
+
+# various ports:
+#arch_binaries="$arch_binaries x86-fbsd? ( http://code.haskell.org/~slyfox/ghc-x86-fbsd/ghc-bin-${PV}-x86-fbsd.tbz2 )"
+
+# 0 - yet
+yet_binary() {
+	case "${ARCH}" in
+		#alpha) return 0 ;;
+		#arm)
+		#	ewarn "ARM binary is built on armv5tel-eabi toolchain. Use with caution."
+		#	return 0
+		#;;
+		amd64) return 0 ;;
+		#ia64) return 0 ;;
+		#ppc) return 0 ;;
+		#ppc64) return 0 ;;
+		#sparc) return 0 ;;
+		x86) return 0 ;;
+		*) return 1 ;;
+	esac
+}
+
+GHC_PV=${PV}
+#GHC_PV=7.10.1.20150630 # uncomment only for -rc ebuilds
+GHC_P=${PN}-${GHC_PV} # using ${P} is almost never correct
+
+#SRC_URI="!binary? ( http://downloads.haskell.org/~ghc/${PV/_rc/-rc}/${GHC_P}-src.tar.bz2 )"
+# Upstream tarball was repackaged and inplace-updated. CDN cached old version for
+# many users
+SRC_URI="!binary? ( http://dev.gentoo.org/~slyfox/distfiles/${GHC_P}-src.tar.bz2 )"
+S="${WORKDIR}"/${GHC_P}
+
+[[ -n $arch_binaries ]] && SRC_URI+=" !ghcbootstrap? ( $arch_binaries )"
+
+BUMP_LIBRARIES=(
+	# "hackage-name          hackage-version"
+	"binary                  0.7.5.0"
+	"hoopl                   3.10.1.0"
+	"transformers            0.4.3.0"
+)
+
+LICENSE="BSD"
+SLOT="0/${PV}"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-linux"
+IUSE="doc ghcbootstrap ghcmakebinary +gmp"
+IUSE+=" binary"
+IUSE+=" elibc_glibc" # system stuff
+
+RDEPEND="
+	>=dev-lang/perl-5.6.1
+	>=dev-libs/gmp-5:=
+	sys-libs/ncurses:=[unicode]
+	!ghcmakebinary? ( virtual/libffi:= )
+	!kernel_Darwin? ( >=sys-devel/gcc-2.95.3:* )
+	kernel_linux? ( >=sys-devel/binutils-2.17:* )
+	kernel_SunOS? ( >=sys-devel/binutils-2.17:* )
+"
+
+# force dependency on >=gmp-5, even if >=gmp-4.1 would be enough. this is due to
+# that we want the binaries to use the latest versioun available, and not to be
+# built against gmp-4
+
+# similar for glibc. we have bootstrapped binaries against glibc-2.17
+DEPEND="${RDEPEND}
+	doc? ( app-text/docbook-xml-dtd:4.2
+		app-text/docbook-xml-dtd:4.5
+		app-text/docbook-xsl-stylesheets
+		>=dev-libs/libxslt-1.1.2 )
+	!ghcbootstrap? ( !prefix? ( elibc_glibc? ( >=sys-libs/glibc-2.17 ) ) )"
+
+PDEPEND="!ghcbootstrap? ( =app-admin/haskell-updater-1.2* )"
+
+REQUIRED_USE="?? ( ghcbootstrap binary )"
+
+# yeah, top-level 'use' sucks. I'd like to have it in 'src_install()'
+use binary && QA_PREBUILT="*"
+
+# haskell libraries built with cabal in configure mode, #515354
+QA_CONFIGURE_OPTIONS+=" --with-compiler --with-gcc"
+
+is_crosscompile() {
+	[[ ${CHOST} != ${CTARGET} ]]
+}
+
+append-ghc-cflags() {
+	local persistent compile assemble link
+	local flag ghcflag
+
+	for flag in $*; do
+		case ${flag} in
+			persistent)	persistent="yes";;
+			compile)	compile="yes";;
+			assemble)	assemble="yes";;
+			link)		link="yes";;
+			*)
+				[[ ${compile}  ]] && ghcflag="-optc${flag}"  CFLAGS+=" ${flag}" && GHC_FLAGS+=" ${ghcflag}" &&
+					[[ ${persistent} ]] && GHC_PERSISTENT_FLAGS+=" ${ghcflag}"
+				[[ ${assemble} ]] && ghcflag="-opta${flag}"  CFLAGS+=" ${flag}" && GHC_FLAGS+=" ${ghcflag}" &&
+					[[ ${persistent} ]] && GHC_PERSISTENT_FLAGS+=" ${ghcflag}"
+				[[ ${link}     ]] && ghcflag="-optl${flag}" LDFLAGS+=" ${flag}" && GHC_FLAGS+=" ${ghcflag}" &&
+					[[ ${persistent} ]] && GHC_PERSISTENT_FLAGS+=" ${ghcflag}"
+				;;
+		esac
+	done
+}
+
+# $1 - lib name (under libraries/)
+# $2 - lib version
+# example: bump_lib "transformers" "0.4.2.0"
+bump_lib() {
+	local pn=$1 pv=$2
+	local p=${pn}-${pv}
+	local f
+
+	einfo "Bumping ${pn} up to ${pv}"
+
+	for f in ghc.mk GNUmakefile; do
+		mv libraries/"${pn}"/$f "${WORKDIR}"/"${p}"/$f || die
+	done
+	mv libraries/"${pn}" "${WORKDIR}"/"${pn}".old || die
+	mv "${WORKDIR}"/"${p}" libraries/"${pn}" || die
+}
+
+update_SRC_URI() {
+	local p pn pv
+	for p in "${BUMP_LIBRARIES[@]}"; do
+		set -- $p
+		pn=$1 pv=$2
+
+		SRC_URI+=" mirror://hackage/package/${pn}/${pn}-${pv}.tar.gz"
+	done
+}
+
+update_SRC_URI
+
+bump_libs() {
+	local p pn pv
+	for p in "${BUMP_LIBRARIES[@]}"; do
+		set -- $p
+		pn=$1 pv=$2
+
+		bump_lib "${pn}" "${pv}"
+	done
+}
+
+ghc_setup_cflags() {
+	if is_crosscompile; then
+		export CFLAGS=${GHC_CFLAGS-"-O2 -pipe"}
+		export LDFLAGS=${GHC_LDFLAGS-"-Wl,-O1"}
+		einfo "Crosscompiling mode:"
+		einfo "   CHOST:   ${CHOST}"
+		einfo "   CTARGET: ${CTARGET}"
+		einfo "   CFLAGS:  ${CFLAGS}"
+		einfo "   LDFLAGS: ${LDFLAGS}"
+		return
+	fi
+	# We need to be very careful with the CFLAGS we ask ghc to pass through to
+	# gcc. There are plenty of flags which will make gcc produce output that
+	# breaks ghc in various ways. The main ones we want to pass through are
+	# -mcpu / -march flags. These are important for arches like alpha & sparc.
+	# We also use these CFLAGS for building the C parts of ghc, ie the rts.
+	strip-flags
+	strip-unsupported-flags
+
+	# Cmm can't parse line numbers #482086
+	replace-flags -ggdb[3-9] -ggdb2
+
+	GHC_FLAGS=""
+	GHC_PERSISTENT_FLAGS=""
+	for flag in ${CFLAGS}; do
+		case ${flag} in
+
+			# Ignore extra optimisation (ghc passes -O to gcc anyway)
+			# -O2 and above break on too many systems
+			-O*) ;;
+
+			# Arch and ABI flags are what we're really after
+			-m*) append-ghc-cflags compile assemble ${flag};;
+
+			# Sometimes it's handy to see backtrace of RTS
+			# to get an idea what happens there
+			-g*) append-ghc-cflags compile ${flag};;
+
+			# Ignore all other flags, including all -f* flags
+		esac
+	done
+
+	for flag in ${LDFLAGS}; do
+		append-ghc-cflags link ${flag}
+	done
+
+	# hardened-gcc needs to be disabled, because the mangler doesn't accept
+	# its output.
+	gcc-specs-pie && append-ghc-cflags persistent compile link -nopie
+	gcc-specs-ssp && append-ghc-cflags persistent compile      -fno-stack-protector
+
+	# prevent from failind building unregisterised ghc:
+	# http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg171602.html
+	use ppc64 && append-ghc-cflags persistent compile -mminimal-toc
+	# fix the similar issue as ppc64 TOC on ia64. ia64 has limited size of small data
+	# currently ghc fails to build haddock
+	# http://osdir.com/ml/gnu.binutils.bugs/2004-10/msg00050.html
+	use ia64 && append-ghc-cflags persistent compile -G0
+}
+
+# substitutes string $1 to $2 in files $3 $4 ...
+relocate_path() {
+	local from=$1
+	local   to=$2
+	shift 2
+	local file=
+	for file in "$@"
+	do
+		sed -i -e "s|$from|$to|g" \
+			"$file" || die "path relocation failed for '$file'"
+	done
+}
+
+# changes hardcoded ghc paths and updates package index
+# $1 - new absolute root path
+relocate_ghc() {
+	local to=$1
+
+	# libdir for prebuilt binary and for current system may mismatch
+	# It does for prefix installation for example: bug #476998
+	local bin_ghc_prefix=${WORKDIR}/usr
+	local bin_libpath=$(echo "${bin_ghc_prefix}"/lib*)
+	local bin_libdir=${bin_libpath#${bin_ghc_prefix}/}
+
+	# backup original script to use it later after relocation
+	local gp_back="${T}/ghc-pkg-${GHC_PV}-orig"
+	cp "${WORKDIR}/usr/bin/ghc-pkg-${GHC_PV}" "$gp_back" || die "unable to backup ghc-pkg wrapper"
+
+	if [[ ${bin_libdir} != $(get_libdir) ]]; then
+		einfo "Relocating '${bin_libdir}' to '$(get_libdir)' (bug #476998)"
+		# moving the dir itself is not strictly needed
+		# but then USE=binary would result in installing
+		# in '${bin_libdir}'
+		mv "${bin_ghc_prefix}/${bin_libdir}" "${bin_ghc_prefix}/$(get_libdir)" || die
+
+		relocate_path "/usr/${bin_libdir}" "/usr/$(get_libdir)" \
+			"${WORKDIR}/usr/bin/ghc-${GHC_PV}" \
+			"${WORKDIR}/usr/bin/ghci-${GHC_PV}" \
+			"${WORKDIR}/usr/bin/ghc-pkg-${GHC_PV}" \
+			"${WORKDIR}/usr/bin/hsc2hs" \
+			"${WORKDIR}/usr/bin/runghc-${GHC_PV}" \
+			"$gp_back" \
+			"${WORKDIR}/usr/$(get_libdir)/${GHC_P}/package.conf.d/"*
+	fi
+
+	# Relocate from /usr to ${EPREFIX}/usr
+	relocate_path "/usr" "${to}/usr" \
+		"${WORKDIR}/usr/bin/ghc-${GHC_PV}" \
+		"${WORKDIR}/usr/bin/ghci-${GHC_PV}" \
+		"${WORKDIR}/usr/bin/ghc-pkg-${GHC_PV}" \
+		"${WORKDIR}/usr/bin/hsc2hs" \
+		"${WORKDIR}/usr/bin/runghc-${GHC_PV}" \
+		"${WORKDIR}/usr/$(get_libdir)/${GHC_P}/package.conf.d/"*
+
+	# this one we will use to regenerate cache
+	# so it should point to current tree location
+	relocate_path "/usr" "${WORKDIR}/usr" "$gp_back"
+
+	if use prefix; then
+		# and insert LD_LIBRARY_PATH entry to EPREFIX dir tree
+		# TODO: add the same for darwin's CHOST and it's DYLD_
+		local new_ldpath='LD_LIBRARY_PATH="'${EPREFIX}/$(get_libdir):${EPREFIX}/usr/$(get_libdir)'${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"\nexport LD_LIBRARY_PATH'
+		sed -i -e '2i'"$new_ldpath" \
+			"${WORKDIR}/usr/bin/ghc-${GHC_PV}" \
+			"${WORKDIR}/usr/bin/ghci-${GHC_PV}" \
+			"${WORKDIR}/usr/bin/ghc-pkg-${GHC_PV}" \
+			"${WORKDIR}/usr/bin/hsc2hs" \
+			"${WORKDIR}/usr/bin/runghc-${GHC_PV}" \
+			"$gp_back" \
+			"${WORKDIR}/usr/bin/hsc2hs" \
+			|| die "Adding LD_LIBRARY_PATH for wrappers failed"
+	fi
+
+	# regenerate the binary package cache
+	"$gp_back" recache || die "failed to update cache after relocation"
+	rm "$gp_back"
+}
+
+pkg_setup() {
+	[[ ${MERGE_TYPE} == binary ]] && return
+
+	if use ghcbootstrap; then
+		ewarn "You requested ghc bootstrapping, this is usually only used"
+		ewarn "by Gentoo developers to make binary .tbz2 packages."
+
+		[[ -z $(type -P ghc) ]] && \
+			die "Could not find a ghc to bootstrap with."
+	else
+		if ! yet_binary; then
+			eerror "Please try emerging with USE=ghcbootstrap and report build"
+			eerror "sucess or failure to the haskell team (haskell@gentoo.org)"
+			die "No binary available for '${ARCH}' arch yet, USE=ghcbootstrap"
+		fi
+	fi
+}
+
+src_unpack() {
+	# Create the ${S} dir if we're using the binary version
+	use binary && mkdir "${S}"
+
+	# the Solaris and Darwin binaries from ghc (maeder) need to be
+	# unpacked separately, so prevent them from being unpacked
+	local ONLYA=${A}
+	case ${CHOST} in
+		*-darwin* | *-solaris*)  ONLYA=${GHC_P}-src.tar.bz2  ;;
+	esac
+	unpack ${ONLYA}
+
+	if [[ -d "${S}"/libraries/dph ]]; then
+		# Sometimes dph libs get accidentally shipped with ghc
+		# but they are not installed unless user requests it.
+		# We never install them.
+		elog "Removing 'libraries/dph'"
+		rm -rf "${S}"/libraries/dph
+	fi
+}
+
+src_prepare() {
+	ghc_setup_cflags
+
+	if ! use ghcbootstrap && [[ ${CHOST} != *-darwin* && ${CHOST} != *-solaris* ]]; then
+		# Modify the wrapper script from the binary tarball to use GHC_PERSISTENT_FLAGS.
+		# See bug #313635.
+		sed -i -e "s|\"\$topdir\"|\"\$topdir\" ${GHC_PERSISTENT_FLAGS}|" \
+			"${WORKDIR}/usr/bin/ghc-${GHC_PV}"
+
+		# allow hardened users use vanilla binary to bootstrap ghc
+		# ghci uses mmap with rwx protection at it implements dynamic
+		# linking on it's own (bug #299709)
+		pax-mark -m "${WORKDIR}/usr/$(get_libdir)/${GHC_P}/bin/ghc"
+	fi
+
+	if use binary; then
+		if use prefix; then
+			relocate_ghc "${EPREFIX}"
+		fi
+
+		# Move unpacked files to the expected place
+		mv "${WORKDIR}/usr" "${S}"
+	else
+		if ! use ghcbootstrap; then
+			case ${CHOST} in
+				*-darwin* | *-solaris*)
+				# UPDATE ME for ghc-7
+				mkdir "${WORKDIR}"/ghc-bin-installer || die
+				pushd "${WORKDIR}"/ghc-bin-installer > /dev/null || die
+				use sparc-solaris && unpack ghc-6.10.4-sparc-sun-solaris2.tar.bz2
+				use x86-solaris && unpack ghc-7.0.3-i386-unknown-solaris2.tar.bz2
+				use x86-macos && unpack ghc-7.4.1-i386-apple-darwin.tar.bz2
+				use x64-macos && unpack ghc-7.4.1-x86_64-apple-darwin.tar.bz2
+				popd > /dev/null
+
+				pushd "${WORKDIR}"/ghc-bin-installer/ghc-[67].?*.? > /dev/null || die
+				# fix the binaries so they run, on Solaris we need an
+				# LD_LIBRARY_PATH which has our prefix libdirs, on
+				# Darwin we need to replace the frameworks with our libs
+				# from the prefix fix before installation, because some
+				# of the tools are actually used during configure/make
+				if [[ ${CHOST} == *-solaris* ]] ; then
+					export LD_LIBRARY_PATH="${EPREFIX}/$(get_libdir):${EPREFIX}/usr/$(get_libdir):${LD_LIBRARY_PATH}"
+				elif [[ ${CHOST} == *-darwin* ]] ; then
+					local readline_framework=GNUreadline.framework/GNUreadline
+					local gmp_framework=/opt/local/lib/libgmp.10.dylib
+					local ncurses_file=/opt/local/lib/libncurses.5.dylib
+					for binary in $(scanmacho -BRE MH_EXECUTE -F '%F' .) ; do
+						install_name_tool -change \
+							${readline_framework} \
+							"${EPREFIX}"/lib/libreadline.dylib \
+							${binary} || die
+						install_name_tool -change \
+							${gmp_framework} \
+							"${EPREFIX}"/usr/lib/libgmp.dylib \
+							${binary} || die
+						install_name_tool -change \
+							${ncurses_file} \
+							"${EPREFIX}"/usr/lib/libncurses.dylib \
+							${binary} || die
+					done
+					# we don't do frameworks!
+					sed -i \
+						-e 's/\(frameworks = \)\["GMP"\]/\1[]/g' \
+						-e 's/\(extraLibraries = \)\["m"\]/\1["m","gmp"]/g' \
+						rts/package.conf.in || die
+				fi
+
+				# it is autoconf, but we really don't want to give it too
+				# much arguments, in fact we do the make in-place anyway
+				./configure --prefix="${WORKDIR}"/usr || die
+				make install || die
+				popd > /dev/null
+				;;
+				*)
+				relocate_ghc "${WORKDIR}"
+				;;
+			esac
+		fi
+
+		sed -i -e "s|\"\$topdir\"|\"\$topdir\" ${GHC_PERSISTENT_FLAGS}|" \
+			"${S}/ghc/ghc.wrapper"
+
+		cd "${S}" # otherwise epatch will break
+
+		epatch "${FILESDIR}"/${PN}-7.0.4-CHOST-prefix.patch
+
+		epatch "${FILESDIR}"/${PN}-7.8.2-cgen-constify.patch
+		epatch "${FILESDIR}"/${PN}-7.8.3-prim-lm.patch
+		epatch "${FILESDIR}"/${PN}-7.10.1-rc3-ghc-7.10-bootstrap.patch
+		epatch "${FILESDIR}"/${PN}-7.10.1-T10590-dequeue.patch
+		# Since ${S}/packages does not include base, etc. add them to gen_contents_index
+		sed -e 's@\(for REPO in .*\)@\1 base integer-gmp integer-gmp2 integer-simple template-haskell@' \
+			-i libraries/gen_contents_index || die
+
+		if use prefix; then
+			# Make configure find docbook-xsl-stylesheets from Prefix
+			sed -e '/^FP_DIR_DOCBOOK_XSL/s:\[.*\]:['"${EPREFIX}"'/usr/share/sgml/docbook/xsl-stylesheets/]:' \
+				-i utils/haddock/doc/configure.ac || die
+		fi
+
+		bump_libs
+
+		# as we have changed the build system
+		eautoreconf
+	fi
+}
+
+src_configure() {
+	if ! use binary; then
+		# initialize build.mk
+		echo '# Gentoo changes' > mk/build.mk
+
+		# Put docs into the right place, ie /usr/share/doc/ghc-${GHC_PV}
+		echo "docdir = ${EPREFIX}/usr/share/doc/${P}" >> mk/build.mk
+		echo "htmldir = ${EPREFIX}/usr/share/doc/${P}" >> mk/build.mk
+
+		# We also need to use the GHC_FLAGS flags when building ghc itself
+		echo "SRC_HC_OPTS+=${HCFLAGS} ${GHC_FLAGS}" >> mk/build.mk
+		echo "SRC_CC_OPTS+=${CFLAGS}" >> mk/build.mk
+		echo "SRC_LD_OPTS+=${LDFLAGS}" >> mk/build.mk
+
+		# We can't depend on haddock except when bootstrapping when we
+		# must build docs and include them into the binary .tbz2 package
+		# app-text/dblatex is not in portage, can not build PDF or PS
+		echo "BUILD_DOCBOOK_PDF  = NO"  >> mk/build.mk
+		echo "BUILD_DOCBOOK_PS   = NO"  >> mk/build.mk
+		if use doc; then
+			echo "BUILD_DOCBOOK_HTML = YES" >> mk/build.mk
+		else
+			echo "BUILD_DOCBOOK_HTML = NO" >> mk/build.mk
+		fi
+
+		# this controls presence on 'xhtml' and 'haddock' in final install
+		echo "HADDOCK_DOCS       = YES" >> mk/build.mk
+
+		# allows overriding build flavours for libraries:
+		# v   - vanilla (static libs)
+		# p   - profiled
+		# dyn - shared libraries
+		# example: GHC_LIBRARY_WAYS="v dyn"
+		if [[ -n ${GHC_LIBRARY_WAYS} ]]; then
+			echo "GhcLibWays=${GHC_LIBRARY_WAYS}" >> mk/build.mk
+		fi
+
+		# Get ghc from the unpacked binary .tbz2
+		# except when bootstrapping we just pick ghc up off the path
+		if ! use ghcbootstrap; then
+			export PATH="${WORKDIR}/usr/bin:${PATH}"
+		fi
+
+		if use gmp; then
+			echo "INTEGER_LIBRARY=integer-gmp2" >> mk/build.mk
+		else
+			echo "INTEGER_LIBRARY=integer-simple" >> mk/build.mk
+		fi
+
+		# don't strip anything. Very useful when stage2 SIGSEGVs on you
+		echo "STRIP_CMD = :" >> mk/build.mk
+
+		local econf_args=()
+
+		# GHC embeds 'gcc' it was built by and uses it later.
+		# Don't allow things like ccache or versioned binary slip.
+		# We use stable thing across gcc upgrades.
+		is_crosscompile || econf_args+=(--with-gcc=${CHOST}-gcc)
+
+		if use ghcmakebinary; then
+			# When building booting libary we are trying to
+			# bundle or restrict most of external depends
+			# with unstable ABI:
+			#  - embed libffi (default GHC behaviour)
+			#  - disable ncurses support for ghci (via haskeline)
+			#    https://bugs.gentoo.org/557478
+			echo "libraries/haskeline_CONFIGURE_OPTS += --flag=-terminfo" >> mk/build.mk
+		else
+			econf_args+=(--with-system-libffi)
+			econf_args+=(--with-ffi-includes=$(pkg-config libffi --cflags-only-I | sed -e 's@^-I@@'))
+		fi
+
+		elog "Final mk/build.mk:"
+		cat mk/build.mk || die
+
+		econf ${econf_args[@]} --enable-bootstrap-with-devel-snapshot
+
+		if [[ ${PV} == *9999* ]]; then
+			GHC_PV="$(grep 'S\[\"PACKAGE_VERSION\"\]' config.status | sed -e 's@^.*=\"\(.*\)\"@\1@')"
+			GHC_P=${PN}-${GHC_PV}
+		fi
+		GHC_TPF="$(grep 'S\[\"TargetPlatformFull\"\]' config.status | sed -e 's@^.*=\"\(.*\)\"@\1@')"
+	fi # ! use binary
+}
+
+src_compile() {
+	if ! use binary; then
+		# 1. build compiler binary first
+		emake ghc/stage2/build/tmp/ghc-stage2
+		# 2. pax-mark (bug #516430)
+		pax-mark -m ghc/stage2/build/tmp/ghc-stage2
+		# 3. and then all the rest
+		emake all
+	fi # ! use binary
+}
+
+src_install() {
+	if use binary; then
+		use prefix && mkdir -p "${ED}"
+		mv "${S}/usr" "${ED}"
+	else
+
+		emake -j1 install DESTDIR="${D}"
+		dodoc "distrib/README" "ANNOUNCE" "LICENSE" "VERSION"
+
+		# rename ghc-shipped files to avoid collision
+		# of external packages. Motivating example:
+		#  user had installed:
+		#      dev-lang/ghc-7.8.4-r0 (with transformers-0.3.0.0)
+		#      dev-haskell/transformers-0.4.2.0
+		#  then user tried to update to
+		#      dev-lang/ghc-7.8.4-r1 (with transformers-0.4.2.0)
+		#  this will lead to single .conf file collision.
+		local shipped_conf renamed_conf
+		local package_confdir="${ED}/usr/$(get_libdir)/${GHC_P}/package.conf.d"
+		for shipped_conf in "${package_confdir}"/*.conf; do
+			# rename 'pkg-ver-id.conf' to 'pkg-ver-id-gentoo-${PF}.conf'
+			renamed_conf=${shipped_conf%.conf}-gentoo-${PF}.conf
+			mv "${shipped_conf}" "${renamed_conf}" || die
+		done
+
+		# remove link, but leave 'haddock-${GHC_P}'
+		rm -f "${ED}"/usr/bin/haddock
+
+		if [[ ! -f "${S}/VERSION" ]]; then
+			echo "${GHC_PV}" > "${S}/VERSION" \
+				|| die "Could not create file ${S}/VERSION"
+		fi
+		newbashcomp "${FILESDIR}"/ghc-bash-completion ghc-pkg
+		newbashcomp utils/completion/ghc.bash         ghc
+	fi
+
+	# path to the package.cache
+	local package_confdir="${ED}/usr/$(get_libdir)/${GHC_P}/package.conf.d"
+	PKGCACHE="${package_confdir}"/package.cache
+	# copy the package.conf.d, including timestamp, save it so we can help
+	# users that have a broken package.conf.d
+	cp -pR "${package_confdir}"{,.initial} || die "failed to backup intial package.conf.d"
+
+	# copy the package.conf, including timestamp, save it so we later can put it
+	# back before uninstalling, or when upgrading.
+	cp -p "${PKGCACHE}"{,.shipped} \
+		|| die "failed to copy package.conf.d/package.cache"
+}
+
+pkg_preinst() {
+	# have we got an earlier version of ghc installed?
+	if has_version "<${CATEGORY}/${PF}"; then
+		haskell_updater_warn="1"
+	fi
+}
+
+pkg_postinst() {
+	ghc-reregister
+
+	# path to the package.cache
+	PKGCACHE="${EROOT}/usr/$(get_libdir)/${GHC_P}/package.conf.d/package.cache"
+
+	# give the cache a new timestamp, it must be as recent as
+	# the package.conf.d directory.
+	touch "${PKGCACHE}"
+
+	if [[ "${haskell_updater_warn}" == "1" ]]; then
+		ewarn
+		ewarn "\e[1;31m************************************************************************\e[0m"
+		ewarn
+		ewarn "You have just upgraded from an older version of GHC."
+		ewarn "You may have to run"
+		ewarn "      'haskell-updater'"
+		ewarn "to rebuild all ghc-based Haskell libraries."
+		ewarn
+		ewarn "\e[1;31m************************************************************************\e[0m"
+		ewarn
+	fi
+}
+
+pkg_prerm() {
+	PKGCACHE="${EROOT}/usr/$(get_libdir)/${GHC_P}/package.conf.d/package.cache"
+	rm -rf "${PKGCACHE}"
+
+	cp -p "${PKGCACHE}"{.shipped,}
+}
+
+pkg_postrm() {
+	ghc-package_pkg_postrm
+}