# $Id$

PNAME="llvm"
PVER="3.7.0"
PBUILD="r1"

SPLIT_PACKAGES="llvm-libs llvm"

PCAT="sys-dev"
HOMEPAGE="http://llvm.org/"

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

LLVM_DEPEND="$(marchdepend)
	>= dev-lang/perl-5.22"

LIB_DEPEND=">= dev-libs/libffi-3.2
	>= sys-libs/zlib-1.2
	>= sys-libs/ncurses-5.9
	== sys-libs/libstdc++-5.2.0"

SDEPEND="${LIB_DEPEND}
	${LLVM_DEPEND}
	>= dev-util/pkgconfig-0.25
	>= sys-dev/bison-2.5
	>= sys-dev/flex-2.3.35
	>= sys-dev/make-3.82
	== sys-dev/gcc-5.2.0
	>= sys-dev/binutils-2.25.1
	>= dev-lang/python-2.7
	>= virtual/sed
	>= dev-libs/libffi-dev-3.2
	>= sys-libs/zlib-dev-1.2
	>= sys-libs/ncurses-dev-5.9"

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

#MANPAGES_SRCFILE="${PNAME}-${PVER}-manpages.tar.bz2"
#MANPAGES_SRCDIR="${BUILDDIR}/${PNAME}-${PVER}-manpages"
MANPAGES_SRCFILE="${PNAME}-3.6.1-manpages.tar.bz2"
MANPAGES_SRCDIR="${BUILDDIR}/${PNAME}-3.6.1-manpages"

sminclude mtools multilib cleanutils
msetfeature "!check"

SRC_URI=(
	http://llvm.org/releases/${PVER}/${SRCFILE}
	mirror://${PNAME}/${SRCFILE}
	mirror://${PNAME}/${MANPAGES_SRCFILE}
)

#UP2DATE="updatecmd ${HOMEPAGE} | grep 'Download now' | sed 's:.*][lL][lL][vV][mM]\ \(.*\):\1:'"
UP2DATE="updatecmd ${HOMEPAGE}/releases/download.html | grep '.src.' | grep '/${PNAME}-[0-9]' | sed 's:.src::g' | highesttarball xz"

# pkgs which require a rebuild: mesa

split_info_llvm-libs()
{
	DESCRIPTION="The Low Level Virtual Machine Runtime Library."
	DEPEND="${LIB_DEPEND}"
	PCAT="sys-libs"
}

split_info_llvm()
{
	DESCRIPTION="The Low Level Virtual Machine."
	DEPEND="${LLVM_DEPEND}
		== sys-libs/llvm-libs-${PVER}"
}

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

	# build outside of the tree
	all-abis 'mkdir ${SRCDIR}/build || die'
}

src_compile()
{
	local myopts
	SRCSUBDIR="build"

	# 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_llvm-libs()
{
	SRCSUBDIR="build"

	# install only libs
	mmake DESTDIR=${BINDIR} install-libs || die

	# keep libLLVM only
	zapmost ${BINDIR} \
		usr/$(mlibdir)/llvm/libLLVM-* \
		$([[ $(mlibdir) != lib ]] && echo "usr/lib/llvm/libLLVM-*") \
		|| die

	# append ld.so.conf
	MCONFIG="/etc/env.d/10llvm"
	mclearconfig || die
	maddconfig "LDPATH=\"/usr/$(mlibdir)/llvm\"" || die
	if [[ $(mlibdir) != lib ]]
	then
		maddconfig "LDPATH=\"/usr/lib/llvm\"" || die
	fi
}

src_install_llvm()
{
	SRCSUBDIR="build"

	mmake DESTDIR=${BINDIR} install || die

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

	# remove libs provided by llvm-libs
	mdelete /usr/$(mlibdir)/llvm/libLLVM-\* || die
	if [[ $(mlibdir) != lib ]]
	then
		mdelete /usr/lib/llvm/libLLVM-\* || die
	fi

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