linamh/sys-devel/llvm-gcc/llvm-gcc-2.1.ebuild

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# Copyright 1999-2007 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $
# TODO:
# This ebuild emits a QA warning about executable stacks. What I could
# find out so far is that cc1 from this package will not include the
# necessary line ".section ... GNU-stack..." in its assembler output,
# while the system's cc1 does. And of course this package's cc1 will be
# used to build its libraries. (check if maybe vanilla gcc 4.0.1 just
# didn't do that either.)
inherit eutils
# TODO: handle gcc4.0 vs gcc4.2
DESCRIPTION="C and C++ Frontend for the Low Level Virtual Machine"
HOMEPAGE="http://llvm.org/"
SRC_URI="http://llvm.org/releases/${PV}/llvm-gcc4.0-${PV}.source.tar.gz"
LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~x86"
# That arch status as of 2.0 is as follows (according to the docs):
#
# x86: Works.
#
# x86-64: Claimed to work.
#
# PowerPC: Won't work.
#
# Alpha: Partial support claimed.
#
# IA-64: Partial support claimed.
IUSE=""
# we're not mirrored, fetch from homepage
RESTRICT="mirror"
DEPEND=">=sys-devel/llvm-base-2.1"
RDEPEND=">=sys-devel/llvm-base-2.1"
S="${WORKDIR}/llvm-gcc4.0-${PV}.source"
MY_LLVM_GCC_PREFIX=/usr/lib/llvm-gcc
# install everything in its own prefix to avoid collisions with regular gcc.
# this same variable is located in llvm-base's ebuild; keep them in sync
src_unpack() {
unpack ${A}
mkdir "${WORKDIR}/obj"
# Note: normally (if you follow the build instructions), we would need to
# pass --enable-llvm=objdir to ./configure in order to build the LLVM
# back-end of GCC (without it we'd get a normal and boring compiler with no
# LLVM). But this option expects the objdir of llvm-base as a parameter,
# which we don't have. by not passing this option, we make ./configure
# believe that we don't want to build the LLVM back-end, thus it won't
# verify the required objdir. Instead, the following sed magic enables
# LLVM support in Makefile.in directly and tells it where to find the
# things it needs
# in gcc/Makefile.in LLVMOBJDIR needs to be set so the LLVM back-end gets
# built, but its value is now meaningless. LLVMSRCDIR is set to the same
# to simulate a objdir == srcdir build of llvm-base. LLVMBINPATH is only
# used to find llvm-config
cd "${S}"
einfo "Enabling LLVM"
sed -e 's,^LLVMSRCDIR.*,LLVMSRCDIR := dummy,' \
-e 's,\$(LLVMSRCDIR)/include,/usr/include,g' \
-e 's,^LLVMOBJDIR.*,LLVMOBJDIR := dummy,' \
-e 's,\$(LLVMOBJDIR)/include,/usr/include,g' \
-e 's,^LLVMBINPATH.*,LLVMBINPATH = /usr/bin,' \
-i gcc/Makefile.in || die "sed failed"
}
src_compile() {
local CONF_FLAGS=""
cd "${WORKDIR}/obj"
# TODO: someone put that in other ebuild attempts to llvm-gcc, but I don't
# know why
#replace-flags "-march=pentium-m" "-march=pentium3"
# TODO: shall we or not?
#CONF_FLAGS="${CONF_FLAGS} --disable-threads"
# this is to avoid this problem: http://llvm.org/bugs/show_bug.cgi?id=896
CONF_FLAGS="${CONF_FLAGS} --disable-shared"
if useq amd64; then
CONF_FLAGS="${CONF_FLAGS} --disable-multilib"
fi
CONF_FLAGS="${CONF_FLAGS} --prefix=${MY_LLVM_GCC_PREFIX}"
CONF_FLAGS="${CONF_FLAGS} --disable-nls"
CONF_FLAGS="${CONF_FLAGS} --enable-languages=c,c++"
CONF_FLAGS="${CONF_FLAGS} --infodir=/usr/share/info"
CONF_FLAGS="${CONF_FLAGS} --mandir=/usr/share/man"
"${S}"/configure ${CONF_FLAGS} || die "./configure failed"
emake || die "emake failed"
# bootstrapping is also possible but takes much longer for unknown benefits
#emake bootstrap || die "emake failed"
}
src_install() {
cd "${WORKDIR}/obj"
make DESTDIR="${D}" install || die "make install failed"
einfo "Install symlinks in /usr/bin"
dodir /usr/bin
cd "${D}/usr/bin"
for X in c++ g++ cpp gcc gcov gccbug; do
ln -s "${MY_LLVM_GCC_PREFIX}/bin/$X" "llvm-$X" || die "ln failed"
done
einfo "Fixing man and info pages"
# man7 contains gfld, gpl and fsf-funding. those should be present on the
# system already
rm -rf "${D}/usr/share/man/man7"
# install man1 pages with a llvm- prefix
cd "${D}/usr/share/man/man1" || die "cd failed"
for X in *; do
mv "${X}" "llvm-${X}" || die "mv failed"
done
# ditto for info pages
cd "${D}/usr/share/info" || die "cd failed"
rm -f dir
for X in *; do
mv "${X}" "llvm-${X}"
done
}