# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-devel/clang/clang-3.1-r5.ebuild,v 1.3 2012/08/30 09:41:16 voyageur Exp $

EAPI=4

RESTRICT_PYTHON_ABIS="3.*"
SUPPORT_PYTHON_ABIS="1"

inherit eutils multilib python

DESCRIPTION="C language family frontend for LLVM"
HOMEPAGE="http://clang.llvm.org/"
# Fetching LLVM as well: see http://llvm.org/bugs/show_bug.cgi?id=4840
SRC_URI="http://llvm.org/releases/${PV}/llvm-${PV}.src.tar.gz
         http://llvm.org/releases/${PV}/compiler-rt-${PV}.src.tar.gz
         http://llvm.org/releases/${PV}/${P}.src.tar.gz"

LICENSE="UoI-NCSA"
SLOT="0"
KEYWORDS="~amd64 ~arm ~x86 ~amd64-fbsd ~x64-freebsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos"
IUSE="debug +doc kernel_FreeBSD multitarget +python static-analyzer test"

DEPEND="static-analyzer? ( dev-lang/perl )
        doc? ( app-doc/doxygen )"
RDEPEND="~sys-devel/llvm-${PV}[multitarget=]"

S=${WORKDIR}/llvm-${PV}.src

src_prepare() {
    mv "${WORKDIR}"/clang-${PV}.src "${S}"/tools/clang \
        || die "clang source directory move failed"
    mv "${WORKDIR}"/compiler-rt-${PV}.src "${S}"/projects/compiler-rt \
        || die "compiler-rt source directory move failed"

    # Same as llvm doc patches
    epatch "${FILESDIR}"/${PN}-2.7-fixdoc.patch

    # multilib-strict
    sed -e "/PROJ_headers/s#lib/clang#$(get_libdir)/clang#" \
        -i tools/clang/lib/Headers/Makefile \
        || die "clang Makefile failed"
    sed -e "/PROJ_resources/s#lib/clang#$(get_libdir)/clang#" \
        -i tools/clang/runtime/compiler-rt/Makefile \
        || die "compiler-rt Makefile failed"
    # fix the static analyzer for in-tree install
    sed -e 's/import ScanView/from clang \0/'  \
        -i tools/clang/tools/scan-view/scan-view \
        || die "scan-view sed failed"
    sed -e "/scanview.css\|sorttable.js/s#\$RealBin#${EPREFIX}/usr/share/${PN}#" \
        -i tools/clang/tools/scan-build/scan-build \
        || die "scan-build sed failed"
    # Set correct path for gold plugin
    sed -e "/LLVMgold.so/s#lib/#$(get_libdir)/llvm/#" \
        -i  tools/clang/lib/Driver/Tools.cpp \
        || die "gold plugin path sed failed"
    # Specify python version
    python_convert_shebangs 2 tools/clang/tools/scan-view/scan-view
    python_convert_shebangs -r 2 test/Scripts
    python_convert_shebangs 2 projects/compiler-rt/lib/asan/scripts/asan_symbolize.py

    # From llvm src_prepare
    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)/llvm, \
        -i Makefile.config.in || die "Makefile.config sed failed"

    einfo "Fixing rpath and CFLAGS"
    sed -e 's,\$(RPATH) -Wl\,\$(\(ToolDir\|LibDir\)),$(RPATH) -Wl\,'"${EPREFIX}"/usr/$(get_libdir)/llvm, \
        -e '/OmitFramePointer/s/-fomit-frame-pointer//' \
        -i Makefile.rules || die "rpath sed failed"

    # Use system llc (from llvm ebuild) for tests
    sed -e "/^llc_props =/s/os.path.join(llvm_tools_dir, 'llc')/'llc'/" \
        -i tools/clang/test/lit.cfg  || die "test path sed failed"

    # Automatically select active system GCC's libraries, bugs #406163 and #417913
    epatch "${FILESDIR}"/${P}-gentoo-runtime-gcc-detection-v3.patch

    # Fix search paths on FreeBSD, bug #409269
    epatch "${FILESDIR}"/${P}-gentoo-freebsd-fix-lib-path.patch

    # Fix regression caused by removal of USE=system-cxx-headers, bug #417541
    epatch "${FILESDIR}"/${P}-gentoo-freebsd-fix-cxx-paths-v2.patch

    # Increase recursion limit, bug #417545, upstream r155737
    epatch "${FILESDIR}"/${P}-increase-parser-recursion-limit.patch

    # Apply r600 OpenCL-related patches, bug #425688
    epatch "${FILESDIR}"/cl-patches/llvm-*.patch
    pushd tools/clang &>/dev/null || die
    epatch "${FILESDIR}"/cl-patches/clang-*.patch
    popd &>/dev/null || die

    # 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)"

    # Setup the search path to include the Prefix includes
    if use prefix ; then
        CONF_FLAGS="${CONF_FLAGS} \
            --with-c-include-dirs=${EPREFIX}/usr/include:/usr/include"
    fi

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

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

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

src_compile() {
    emake KEEP_SYMBOLS=1 REQUIRES_RTTI=1 clang-only
}

src_test() {
    cd "${S}"/test || die "cd failed"
    emake site.exp

    cd "${S}"/tools/clang || die "cd clang failed"

    echo ">>> Test phase [test]: ${CATEGORY}/${PF}"

    testing() {
        if ! emake -j1 VERBOSE=1 test; then
            has test $FEATURES && die "Make test failed. See above for details."
            has test $FEATURES || eerror "Make test failed. See above for details."
        fi
    }
    python_execute_function testing
}

src_install() {
    cd "${S}"/tools/clang || die "cd clang failed"
    emake KEEP_SYMBOLS=1 DESTDIR="${D}" install
    # ATTENTION There is some BUG in a clang Makefiles: doxygened htmls won't
    # install w/ `make install`...
    if use doc; then
        cd "${S}"/tools/clang/docs || die "cd clang/docs failed"
        emake ENABLE_DOXYGEN=1 BUILD_FOR_WEBSITE=1 DESTDIR="${D}" install-doxygen
        cd ..
        # TODO `make install-doxygen` in clang is UGLY! Need to clean *.md5 and *.map
        # files from installed API documentation!
    fi

    if use static-analyzer ; then
        dobin tools/scan-build/ccc-analyzer
        dosym ccc-analyzer /usr/bin/c++-analyzer
        dobin tools/scan-build/scan-build

        insinto /usr/share/${PN}
        doins tools/scan-build/scanview.css
        doins tools/scan-build/sorttable.js

        cd tools/scan-view || die "cd scan-view failed"
        dobin scan-view
        install-scan-view() {
            insinto "$(python_get_sitedir)"/clang
            doins Reporter.py Resources ScanView.py startfile.py
            touch "${ED}"/"$(python_get_sitedir)"/clang/__init__.py
        }
        python_execute_function install-scan-view
    fi

    if use python; then
        cd ${S}/tools/clang/bindings/python/clang
        install-cindex() {
            insinto "$(python_get_sitedir)"/clang
            doins cindex.py __init__.py
        }
        python_execute_function install-cindex
    fi

    # Fix install_names on Darwin.  The build system is too complicated
    # to just fix this, so we correct it post-install
    if [[ ${CHOST} == *-darwin* ]] ; then
        for lib in libclang.dylib ; do
            ebegin "fixing install_name of $lib"
            install_name_tool -id "${EPREFIX}"/usr/lib/llvm/${lib} \
                "${ED}"/usr/lib/llvm/${lib}
            eend $?
        done
        for f in usr/bin/{c-index-test,clang} usr/lib/llvm/libclang.dylib ; do
            ebegin "fixing references in ${f##*/}"
            install_name_tool \
                -change "@rpath/libclang.dylib" \
                    "${EPREFIX}"/usr/lib/llvm/libclang.dylib \
                -change "@executable_path/../lib/libLLVM-${PV}.dylib" \
                    "${EPREFIX}"/usr/lib/llvm/libLLVM-${PV}.dylib \
                -change "${S}"/Release/lib/libclang.dylib \
                    "${EPREFIX}"/usr/lib/llvm/libclang.dylib \
                "${ED}"/$f
            eend $?
        done
    fi

    # Remove unnecessary headers on FreeBSD, bug #417171
    use kernel_FreeBSD && rm "${ED}"usr/$(get_libdir)/clang/${PV}/include/{arm_neon,std,float,iso,limits,tgmath,varargs}*.h
}

pkg_postinst() {
    python_mod_optimize clang
}

pkg_postrm() {
    python_mod_cleanup clang
}