# $Id$

PNAME="llvm"
PVER="3.2"
PBUILD="r4"

PCAT="sys-dev"

DESCRIPTION="The Low Level Virtual Machine."
HOMEPAGE="http://llvm.org/"

DEPEND_x86_64=">= sys-apps/multiarch-wrapper-1"
SPECIAL_VARS="DEPEND_x86_64"

DEPEND="$(marchdepend)
	>= dev-lang/perl-5.18
	>= dev-libs/libffi-3
	>= sys-libs/libstdc++-4.8"

SDEPEND=">= dev-util/pkgconfig-0.25
	>= sys-dev/bison-2.5
	>= sys-dev/flex-2.3.35
	>= sys-dev/make-3.82
	>= sys-dev/gcc-4.8
	>= sys-dev/binutils-2.23"

SRCFILE="${PNAME}-${PVER}.src.tar.gz"
SRCDIR="${BUILDDIR}/${PNAME}-${PVER}.src"

MANPAGES_SRCFILE="${PNAME}-${PVER}-manpages.tar.bz2"
MANPAGES_SRCDIR="${BUILDDIR}/${PNAME}-${PVER}-manpages"

sminclude mtools multilib
msetfeature "!check"

SRC_URI=(
	http://llvm.org/releases/${PVER}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${MANPAGES_SRCFILE}
	mirror://${PNAME}/${PNAME}-${PVER}-fix-debug-line-info.patch
	mirror://${PNAME}/${PNAME}-${PVER}-R600-tstellar-git-b53ed46.patch
)

UP2DATE="updatecmd ${HOMEPAGE} | grep 'Download now' | sed 's:.*][lL][lL][vV][mM]\ \(.*\):\1:'"

src_prepare()
{
	munpack ${SRCFILE} || die
	# pre-generated man-pages
	oldmunpack ${MANPAGES_SRCFILE} || die

	# fix invalid debug information
	mpatch ${PNAME}-${PVER}-fix-debug-line-info.patch || die

	# support new R600 amdgpu drivers
	mpatch ${PNAME}-${PVER}-R600-tstellar-git-b53ed46.patch || die

	# fix symbolic links from OCaml bindings to LLVM libraries
	all-abis 'sed -i "s:\$(PROJ_libdir):/usr/$(mlibdir)/llvm:" bindings/ocaml/Makefile.ocaml || die'

	# non-standard configure, fix config pathes and cflags
	all-abis 'sed -i -e "s:\$(PROJ_prefix)/etc/llvm:/etc/llvm:"
		-e "s:\$(PROJ_prefix)/lib:\$(PROJ_prefix)/$(mlibdir)/llvm:"
		-e "s:\$(PROJ_prefix)/docs/llvm:\$(PROJ_prefix)/share/doc/${PNAME}-${PVER}:"
		Makefile.config.in || die'
	all-abis 'sed -i "/ActiveLibDir = ActivePrefix/s:lib:$(mlibdir)/llvm:" tools/llvm-config/llvm-config.cpp || die'
	all-abis 'sed -i "s:LLVM_LIBDIR=\"\${prefix}/lib\":LLVM_LIBDIR=\"\${prefix}/$(mlibdir)/llvm\":" autoconf/configure.ac configure || die'

	# remove insecure rpath
	all-abis 'sed -i "s:\$(RPATH) -Wl,\$(\(ToolDir\|LibDir\|ExmplDir\))::g" Makefile.rules || die'

	# fix gold
	all-abis 'sed -i "s:\$(SharedLibDir):/usr/$(mlibdir)/llvm:" tools/gold/Makefile || die'

	# ugly hack - fix broken path retrieval on magellan - fixme!
	all-abis 'sed -i "s:CurrentPath(GetExecutablePath(argv\[0\]).str()):CurrentPath(\"/usr/bin/llvm-config\"):" tools/llvm-config/llvm-config.cpp || die'
}

src_compile()
{
	local myopts

	# enable pic on 64bit arches
	[[ ${ARCH} = x86_64 ]] && myopts+="--enable-pic"
	
	# be multilib friendly
	[[ $(mlibdir) != lib ]] && myopts+=" --with-cxx-include-32bit-dir=32"

	# include location of libffi headers
	export CPPFLAGS="${CPPFLAGS} $(pkg-config --cflags libffi)"

	# force use of gcc instead of clang if already installed
	CC=$(mabi-cc) CXX=$(mabi-cxx) \
	mconfigure \
		--libdir=/usr/$(mlibdir)/llvm \
		--enable-shared \
		--disable-expensive-checks \
		--disable-debug-runtime \
		--disable-assertions \
		--enable-optimized \
		--enable-libffi \
		--enable-targets=all \
		--enable-bindings=none \
		--enable-experimental-targets=R600 \
		${myopts} \
		|| die

	mmake VERBOSE=1 REQUIRES_RTTI=1 || die

	# no python sphinx in out src tree, use pre-generated docs atm
	# mmake -C docs -f Makefile.sphinx man html || die
}

src_install()
{
	mmake DESTDIR=${BINDIR} install || die

	# install pre-generated man-pages
	minstallman ${MANPAGES_SRCDIR}/*.1 || die

	# be multilib friendly
	if [[ $(mlibdir) != lib ]]
	then
		if [[ -f ${BINDIR}/usr/bin/llvm-config ]]
		then
			rm ${BINDIR}/usr/bin/llvm-config || die
		fi
		all-abis minstallexec Release/bin/llvm-config /usr/bin/llvm-config-$(mabi) || die
		mlink multiarch-wrapper /usr/bin/llvm-config || die
 
		if [[ -f ${BINDIR}/usr/include/llvm/Config/config.h ]]
		then
			rm ${BINDIR}/usr/include/llvm/Config/config.h || die
		fi
		all-abis minstallfile include/llvm/Config/config.h /usr/include/llvm/Config/config-$(mabi).h || die
		cat > ${BINDIR}/usr/include/llvm/Config/config.h << EOF
#include <bits/wordsize.h>

#if __WORDSIZE == 32
#include "config-m32.h"
#elif __WORDSIZE == 64
#include "config-m64.h"
#else
#error "Unknown word size"
#endif
EOF

		if [[ -f ${BINDIR}/usr/include/llvm/Config/llvm-config.h ]]
		then
			rm ${BINDIR}/usr/include/llvm/Config/llvm-config.h || die
		fi
		all-abis minstallfile include/llvm/Config/llvm-config.h /usr/include/llvm/Config/llvm-config-$(mabi).h || die
		cat > ${BINDIR}/usr/include/llvm/Config/llvm-config.h << EOF
#include <bits/wordsize.h>

#if __WORDSIZE == 32
#include "llvm-config-m32.h"
 #elif __WORDSIZE == 64
 #include "llvm-config-m64.h"
 #else
 #error "Unknown word size"
 #endif
EOF
	fi
}