LICENSE = "Apache-2.0 & BSD-3-Clause & MIT & Zlib"

LIC_FILES_CHKSUM = "file://LICENSE;md5=f87516e0b698007e9e75a1fe1012b390 \
                    file://buildtools/libcxx/LICENSE.TXT;md5=55d89dd7eec8d3b4204b680e27da3953 \
                    file://buildtools/libcxx/utils/google-benchmark/LICENSE;md5=3b83ef96387f14655fc854ddc3c6bd57 \
                    file://buildtools/libcxxabi/LICENSE.TXT;md5=7b9334635b542c56868400a46b272b1e \
                    file://buildtools/libunwind/LICENSE.TXT;md5=f66970035d12f196030658b11725e1a1 \
                    file://buildtools/protobuf/LICENSE;md5=37b5762e07f0af8c74ce80a8bda4266b \
                    file://buildtools/zlib/LICENSE;md5=f09575dbfb09420642318b413159496f \
                    file://debian/copyright;md5=4e08364c82141f181de69d0a2b89d612 \
                    file://python/LICENSE;md5=c602a632c34ade9c78a976734077bce7"

SRC_URI:append = " \
           git://github.com/protocolbuffers/protobuf.git;branch=3.9.x;protocol=https;destsuffix=git/buildtools/protobuf;name=protobuf \
           git://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxx.git;protocol=https;destsuffix=git/buildtools/libcxx;branch=main;name=libcxx \
           git://chromium.googlesource.com/external/github.com/llvm/llvm-project/libcxxabi.git;protocol=https;destsuffix=git/buildtools/libcxxabi;branch=main;name=libcxxabi \
           git://chromium.googlesource.com/external/github.com/llvm/llvm-project/libunwind.git;protocol=https;destsuffix=git/buildtools/libunwind;branch=main;name=libunwind \
           git://android.googlesource.com/platform/external/zlib.git;branch=master;protocol=https;destsuffix=git/buildtools/zlib;name=zlib \
           https://storage.googleapis.com/perfetto/gn-linux64-1968-0725d782;subdir=git/buildtools/;name=gn \
           file://0001-Remove-check_build_deps-build-steps.patch "

SRCREV_protobuf = "6a59a2ad1f61d9696092f79b6d74368b4d7970a3"
SRCREV_libcxx = "d9040c75cfea5928c804ab7c235fed06a63f743a"
SRCREV_libcxxabi = "196ba1aaa8ac285d94f4ea8d9836390a45360533"
SRCREV_libunwind = "d999d54f4bca789543a2eb6c995af2d9b5a1f3ed"
SRCREV_zlib = "5c85a2da4c13eda07f69d81a1579a5afddd35f59"
SRC_URI[gn.sha256sum] = "f706aaa0676e3e22f5fc9ca482295d7caee8535d1869f99efa2358177b64f5cd"

require perfetto.inc

DEPENDS += " ninja-native"

COMPATIBLE_HOST = "(i.86|x86_64|aarch64|arm).*-linux*"

FILES:${PN}:append = " \
  ${bindir}/tracebox \
  "

B = "${WORKDIR}/build"

# Run the GN (Generate Ninja) script, and replace the compiler flags where applicable
do_configure () {
    # Configuration needs to be done from the source directory
    cd ${S}
    # Rename a few build tools if they have not been renamed
    cd buildtools
    x="gn-linux64-1968-0725d782"
    [ -f $x ] && mkdir linux64 && mv $x linux64/gn
    chmod +x linux64/gn
    cd ..

    CC_BIN=`echo $CC | awk '{print $1}'`
    CXX_BIN=`echo $CXX | awk '{print $1}'`
    STRIP_BIN=`echo $STRIP | awk '{print $1}'`

    ARGS="is_debug=false "  # Tell gn to use release mode

    if [ -z `echo ${TOOLCHAIN} | grep clang` ]; then
        ARGS=$ARGS" is_clang=false"
    else
        ARGS=$ARGS" is_clang=true"
    fi
    
    # Architecture parameter accepted by Perfetto
    arch=${TARGET_ARCH}
    if [ $arch = "i686" ]; then
        arch="x86"
    elif [ $arch = "x86_64" ]; then
        arch="x64"
    elif [ $arch = "aarch64" ]; then
        arch="arm64"
    fi
    
    # For ARM32 with hardware floating point using clang and musl, we need to
    # specify -mfloat-abi=hard to make the ABI settings of the linker and the
    # compiler match. The linker would use hardware float ABI. The compiler does
    # not. As a result we need to force the compiler to do so by adding
    # -mfloat-abi=hard to compilation flags.
    FLOAT_ABI=""
    if [[ "${@bb.utils.contains('TUNE_FEATURES', 'callconvention-hard', 'true', 'false', d)}" == "true" ]]; then
      FLOAT_ABI="-mfloat-abi=hard"
    fi

    ARGS=$ARGS" target_os=\"linux\""
    ARGS=$ARGS" target_cpu=\"$arch\""
    ARGS=$ARGS" target_cc=\"$CC_BIN ${FLOAT_ABI}\""
    ARGS=$ARGS" target_cxx=\"$CXX_BIN -std=c++11 ${FLOAT_ABI}\""
    ARGS=$ARGS" target_strip=\"$STRIP_BIN\"" #
    ARGS=$ARGS" target_sysroot=\"${RECIPE_SYSROOT}\""
    ARGS=$ARGS" target_linker=\"$CC_BIN ${FLOAT_ABI} ${LDFLAGS}\""
    ARGS=$ARGS" target_ar=\"$AR\""
    ARGS="'$ARGS'"
    cmd="tools/gn gen --args=$ARGS ${B}"

    echo $cmd
    # Use eval, not just call $cmd, due to escaping of single quotation marks
    eval $cmd

    cd ${B}
    # Eliminate a few incompatible build flags
    REPLACES="s/-Wl,--icf=all//g"
    REPLACES=$REPLACES";s/-Werror//g"
    REPLACES=$REPLACES";s/-mfpu=neon//g"
    REPLACES=$REPLACES";s/-fcolor-diagnostics//g"
    REPLACES=$REPLACES";s/=format-security//g"
    REPLACES=$REPLACES";s/-fdiagnostics-show-template-tree//g"
    REPLACES=$REPLACES";s/-D_FORTIFY_SOURCE=2//g"
    REPLACES=$REPLACES";s/-fuse-ld=\S*//g"

    find . -name "*.ninja" | xargs sed $REPLACES -i

    # If using the clang toolchain: use the clang host-side binaries built by Bitbake
    if [ "${TOOLCHAIN}" = "clang" ]; then
        BB_CLANGXX="${BUILD_CXX} ${BUILD_LDFLAGS} ${FLOAT_ABI}"
        BB_CLANG="${BUILD_CC} ${FLOAT_ABI}"
        BB_LLVM_OBJCOPY="${RECIPE_SYSROOT_NATIVE}/usr/bin/llvm-objcopy"
        
        HOST_CLANGXX="${STAGING_DIR_NATIVE}/usr/bin/clang++ -stdlib=libc++ -rtlib=libgcc -unwindlib=libgcc ${FLOAT_ABI}"
        HOST_CLANG="${STAGING_DIR_NATIVE}/usr/bin/clang ${FLOAT_ABI}"
        HOST_LLVM_OBJCOPY="${STAGING_DIR_NATIVE}/usr/bin/llvm-objcopy"

        cd gcc_like_host
        REPLACES="s:\S*clang++ :$HOST_CLANGXX :g"
        REPLACES=$REPLACES";s:\S*clang :$HOST_CLANG :g"
        REPLACES=$REPLACES";s:\S*llvm-objcopy :$HOST_LLVM_OBJCOPY :g"
        find . -name "*.ninja" | xargs sed "$REPLACES" -i
        cd ..
    fi
    # Done processing the Ninja files

    # Workaround for the functions not supported by musl
    if [ "${TCLIBC}" = "musl" ]; then
        sed -e 's/strtoll_l(__a, \&__p2, __base, _LIBCPP_GET_C_LOCALE)/strtoll(__a, \&__p2, __base)/g' \
            -e 's/strtoull_l(__a, \&__p2, __base, _LIBCPP_GET_C_LOCALE)/strtoull(__a, \&__p2, __base)/g' \
            ${S}/buildtools/libcxx/include/locale -i
    fi
}

# Perfetto generates a few different binaries, such as traced and traced_probes and perfetto.
# The "tracebox" is a busybox that combines the 3 above and provides a single stop for trace capture, so we only build "tracebox" here.
do_compile () {
    cd ${B}
    ninja -C . tracebox
}

do_install () {
    BIN_DIR=${D}${bindir}

    install -d -m0755 $BIN_DIR
    install ${B}/tracebox $BIN_DIR/tracebox
}