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# Copyright 1999-2013 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-devel/llvm/llvm-9999.ebuild,v 1.39 2013/02/02 23:41:54 mgorny Exp $

EAPI=5

# pypy gives me around 1700 unresolved tests due to open file limit
# being exceeded. probably GC does not close them fast enough.
PYTHON_COMPAT=( python{2_5,2_6,2_7} )

inherit git eutils flag-o-matic multilib python-any-r1 toolchain-funcs pax-utils

DESCRIPTION="Low Level Virtual Machine"
HOMEPAGE="http://llvm.org/"
SRC_URI=""
EGIT_REPO_URI="git://people.freedesktop.org/~tstellar/llvm"

LICENSE="UoI-NCSA"
SLOT="0"
KEYWORDS=""
IUSE="debug doc gold +libffi multitarget ocaml test udis86 vim-syntax r600"

DEPEND="dev-lang/perl
    dev-python/sphinx
    >=sys-devel/make-3.79
    >=sys-devel/flex-2.5.4
    >=sys-devel/bison-1.875d
    || ( >=sys-devel/gcc-3.0 >=sys-devel/gcc-apple-4.2.1 )
    || ( >=sys-devel/binutils-2.18 >=sys-devel/binutils-apple-3.2.3 )
    gold? ( >=sys-devel/binutils-2.22[cxx] )
    libffi? ( virtual/pkgconfig
        virtual/libffi )
    ocaml? ( dev-lang/ocaml )
    udis86? ( dev-libs/udis86[pic(+)] )
    ${PYTHON_DEPS}"
RDEPEND="dev-lang/perl
    libffi? ( virtual/libffi )
    vim-syntax? ( || ( app-editors/vim app-editors/gvim ) )"

pkg_setup() {
    # Required for test and build
    python-any-r1_pkg_setup

    # need to check if the active compiler is ok

    broken_gcc=" 3.2.2 3.2.3 3.3.2 4.1.1 "
    broken_gcc_x86=" 3.4.0 3.4.2 "
    broken_gcc_amd64=" 3.4.6 "

    gcc_vers=$(gcc-fullversion)

    if [[ ${broken_gcc} == *" ${version} "* ]] ; then
        elog "Your version of gcc is known to miscompile llvm."
        elog "Check http://www.llvm.org/docs/GettingStarted.html for"
        elog "possible solutions."
        die "Your currently active version of gcc is known to miscompile llvm"
    fi

    if [[ ${CHOST} == i*86-* && ${broken_gcc_x86} == *" ${version} "* ]] ; then
        elog "Your version of gcc is known to miscompile llvm on x86"
        elog "architectures.  Check"
        elog "http://www.llvm.org/docs/GettingStarted.html for possible"
        elog "solutions."
        die "Your currently active version of gcc is known to miscompile llvm"
    fi

    if [[ ${CHOST} == x86_64-* && ${broken_gcc_amd64} == *" ${version} "* ]];
    then
        elog "Your version of gcc is known to miscompile llvm in amd64"
        elog "architectures.  Check"
        elog "http://www.llvm.org/docs/GettingStarted.html for possible"
        elog "solutions."
        die "Your currently active version of gcc is known to miscompile llvm"
    fi
}

src_prepare() {
    # unfortunately ./configure won't listen to --mandir and the-like, so take
    # care of this.
    einfo "Fixing install dirs"
    sed -e 's,^PROJ_docsdir.*,PROJ_docsdir := $(PROJ_prefix)/share/doc/'${PF}, \
        -e 's,^PROJ_etcdir.*,PROJ_etcdir := '"${EPREFIX}"'/etc/llvm,' \
        -e 's,^PROJ_libdir.*,PROJ_libdir := $(PROJ_prefix)/'$(get_libdir)/${PN}, \
        -i Makefile.config.in || die "Makefile.config sed failed"
    sed -e "/ActiveLibDir = ActivePrefix/s/lib/$(get_libdir)\/${PN}/" \
        -i tools/llvm-config/llvm-config.cpp || die "llvm-config sed failed"

    einfo "Fixing rpath and CFLAGS"
    sed -e 's,\$(RPATH) -Wl\,\$(\(ToolDir\|LibDir\)),$(RPATH) -Wl\,'"${EPREFIX}"/usr/$(get_libdir)/${PN}, \
        -e '/OmitFramePointer/s/-fomit-frame-pointer//' \
        -i Makefile.rules || die "rpath sed failed"
    if use gold; then
        sed -e 's,\$(SharedLibDir),'"${EPREFIX}"/usr/$(get_libdir)/${PN}, \
            -i tools/gold/Makefile || die "gold rpath sed failed"
    fi

    # FileCheck is needed at least for dragonegg tests
    sed -e "/NO_INSTALL = 1/s/^/#/" -i utils/FileCheck/Makefile \
        || die "FileCheck Makefile sed failed"

    epatch "${FILESDIR}"/${PN}-3.2-nodoctargz.patch
    epatch "${FILESDIR}"/${PN}-3.0-PPC_macro.patch

    # User patches
    epatch_user
}

src_configure() {
    local CONF_FLAGS="--enable-shared
        --with-optimize-option=
        $(use_enable !debug optimized)
        $(use_enable debug assertions)
        $(use_enable debug expensive-checks)"

    if use multitarget; then
        CONF_FLAGS="${CONF_FLAGS} --enable-targets=all"
    else
        CONF_FLAGS="${CONF_FLAGS} --enable-targets=host,cpp"
    fi

        CONF_FLAGS="${CONF_FLAGS} --enable-experimental-targets=R600"

    if use amd64; then
        CONF_FLAGS="${CONF_FLAGS} --enable-pic"
    fi

    if use gold; then
        CONF_FLAGS="${CONF_FLAGS} --with-binutils-include=${EPREFIX}/usr/include/"
    fi
    if use ocaml; then
        CONF_FLAGS="${CONF_FLAGS} --enable-bindings=ocaml"
    else
        CONF_FLAGS="${CONF_FLAGS} --enable-bindings=none"
    fi

    if use udis86; then
        CONF_FLAGS="${CONF_FLAGS} --with-udis86"
    fi

    if use libffi; then
        append-cppflags "$(pkg-config --cflags libffi)"
    fi
    CONF_FLAGS="${CONF_FLAGS} $(use_enable libffi)"

    # llvm prefers clang over gcc, so we may need to force that
    tc-export CC CXX
    econf ${CONF_FLAGS}
}

src_compile() {
    emake VERBOSE=1 KEEP_SYMBOLS=1 REQUIRES_RTTI=1

    emake -C docs -f Makefile.sphinx man
    use doc && emake -C docs -f Makefile.sphinx html

    pax-mark m Release/bin/lli
    if use test; then
        pax-mark m unittests/ExecutionEngine/JIT/Release/JITTests
        pax-mark m unittests/ExecutionEngine/MCJIT/Release/MCJITTests
        pax-mark m unittests/Support/Release/SupportTests
    fi
}

src_install() {
    emake KEEP_SYMBOLS=1 DESTDIR="${D}" install

    doman docs/_build/man/*.1
    use doc && dohtml -r docs/_build/html/

    if use vim-syntax; then
        insinto /usr/share/vim/vimfiles/syntax
        doins utils/vim/*.vim
    fi

    # Fix install_names on Darwin.  The build system is too complicated
    # to just fix this, so we correct it post-install
    local lib= f= odylib= libpv=${PV}
    if [[ ${CHOST} == *-darwin* ]] ; then
        eval $(grep PACKAGE_VERSION= configure)
        [[ -n ${PACKAGE_VERSION} ]] && libpv=${PACKAGE_VERSION}
        for lib in lib{EnhancedDisassembly,LLVM-${libpv},LTO,profile_rt}.dylib {BugpointPasses,LLVMHello}.dylib ; do
            # libEnhancedDisassembly is Darwin10 only, so non-fatal
            [[ -f ${ED}/usr/lib/${PN}/${lib} ]] || continue
            ebegin "fixing install_name of $lib"
            install_name_tool \
                -id "${EPREFIX}"/usr/lib/${PN}/${lib} \
                "${ED}"/usr/lib/${PN}/${lib}
            eend $?
        done
        for f in "${ED}"/usr/bin/* "${ED}"/usr/lib/${PN}/libLTO.dylib ; do
            odylib=$(scanmacho -BF'%n#f' "${f}" | tr ',' '\n' | grep libLLVM-${libpv}.dylib)
            ebegin "fixing install_name reference to ${odylib} of ${f##*/}"
            install_name_tool \
                -change "${odylib}" \
                    "${EPREFIX}"/usr/lib/${PN}/libLLVM-${libpv}.dylib \
                "${f}"
            eend $?
        done
    fi
}