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SUMMARY = "Performance analysis tools for Linux"
DESCRIPTION = "Performance counters for Linux are a new kernel-based \
subsystem that provide a framework for all things \
performance analysis. It covers hardware level \
(CPU/PMU, Performance Monitoring Unit) features \
and software features (software counters, tracepoints) \
as well."
HOMEPAGE = "https://perf.wiki.kernel.org/index.php/Main_Page"

LICENSE = "GPLv2"

PR = "r9"

PACKAGECONFIG ??= "scripting tui libunwind"
PACKAGECONFIG[dwarf] = ",NO_DWARF=1"
PACKAGECONFIG[scripting] = ",NO_LIBPERL=1 NO_LIBPYTHON=1,perl python"
# gui support was added with kernel 3.6.35
# since 3.10 libnewt was replaced by slang
# to cover a wide range of kernel we add both dependencies
PACKAGECONFIG[tui] = ",NO_NEWT=1,libnewt slang"
PACKAGECONFIG[libunwind] = ",NO_LIBUNWIND=1 NO_LIBDW_DWARF_UNWIND=1,libunwind"
PACKAGECONFIG[libnuma] = ",NO_LIBNUMA=1"
PACKAGECONFIG[systemtap] = ",NO_SDT=1,systemtap"
PACKAGECONFIG[jvmti] = ",NO_JVMTI=1"
# libaudit support would need scripting to be enabled
PACKAGECONFIG[audit] = ",NO_LIBAUDIT=1,audit"
PACKAGECONFIG[manpages] = ",,xmlto-native asciidoc-native"

# libunwind is not yet ported for some architectures
PACKAGECONFIG_remove_arc = "libunwind"
PACKAGECONFIG_remove_riscv64 = "libunwind"

DEPENDS = " \
    virtual/${MLPREFIX}libc \
    ${MLPREFIX}elfutils \
    ${MLPREFIX}binutils \
    bison-native flex-native xz \
"

do_configure[depends] += "virtual/kernel:do_shared_workdir"

PROVIDES = "virtual/perf"

inherit linux-kernel-base kernel-arch manpages

# needed for building the tools/perf Python bindings
inherit ${@bb.utils.contains('PACKAGECONFIG', 'scripting', 'pythonnative', '', d)}
inherit python-dir
export PYTHON_SITEPACKAGES_DIR

#kernel 3.1+ supports WERROR to disable warnings as errors
export WERROR = "0"

do_populate_lic[depends] += "virtual/kernel:do_patch"

# needed for building the tools/perf Perl binding
include ${@bb.utils.contains('PACKAGECONFIG', 'scripting', 'perf-perl.inc', '', d)}

inherit kernelsrc

S = "${WORKDIR}/${BP}"
SPDX_S = "${S}/tools/perf"

# The LDFLAGS is required or some old kernels fails due missing
# symbols and this is preferred than requiring patches to every old
# supported kernel.
LDFLAGS="-ldl -lutil"

EXTRA_OEMAKE = '\
    -C ${S}/tools/perf \
    O=${B} \
    CROSS_COMPILE=${TARGET_PREFIX} \
    ARCH=${ARCH} \
    CC="${CC}" \
    AR="${AR}" \
    LD="${LD}" \
    EXTRA_CFLAGS="-ldw" \
    EXTRA_LDFLAGS="${PERF_EXTRA_LDFLAGS}" \
    perfexecdir=${libexecdir} \
    NO_GTK2=1 \
    ${PACKAGECONFIG_CONFARGS} \
    TMPDIR="${B}" \
    LIBUNWIND_DIR=${STAGING_EXECPREFIXDIR} \
'

EXTRA_OEMAKE += "\
    'DESTDIR=${D}' \
    'prefix=${prefix}' \
    'bindir=${bindir}' \
    'sharedir=${datadir}' \
    'sysconfdir=${sysconfdir}' \
    'perfexecdir=${libexecdir}/perf-core' \
    'ETC_PERFCONFIG=${@os.path.relpath(sysconfdir, prefix)}' \
    'sharedir=${@os.path.relpath(datadir, prefix)}' \
    'mandir=${@os.path.relpath(mandir, prefix)}' \
    'infodir=${@os.path.relpath(infodir, prefix)}' \
"

# During do_configure, we might run a 'make clean'. That often breaks
# when done in parallel, so disable parallelism for do_configure. Note
# that it has to be done this way rather than by passing -j1, since
# perf's build system by default ignores any -j argument, but does
# honour a JOBS variable.
EXTRA_OEMAKE_append_task-configure = " JOBS=1"

PERF_SRC ?= "Makefile \
             include \
             tools/arch \
             tools/build \
             tools/include \
             tools/lib \
             tools/Makefile \
             tools/perf \
             tools/scripts \
"

PERF_EXTRA_LDFLAGS = ""

# MIPS N32
PERF_EXTRA_LDFLAGS_mipsarchn32eb = "-m elf32btsmipn32"
PERF_EXTRA_LDFLAGS_mipsarchn32el = "-m elf32ltsmipn32"

do_compile() {
	# Linux kernel build system is expected to do the right thing
	unset CFLAGS
	oe_runmake all
}

do_install() {
	# Linux kernel build system is expected to do the right thing
	unset CFLAGS
	oe_runmake install
	# we are checking for this make target to be compatible with older perf versions
	if ${@bb.utils.contains('PACKAGECONFIG', 'scripting', 'true', 'false', d)} && grep -q install-python_ext ${S}/tools/perf/Makefile*; then
		oe_runmake DESTDIR=${D} install-python_ext
	fi
}

do_configure[prefuncs] += "copy_perf_source_from_kernel"
python copy_perf_source_from_kernel() {
    sources = (d.getVar("PERF_SRC") or "").split()
    src_dir = d.getVar("STAGING_KERNEL_DIR")
    dest_dir = d.getVar("S")
    bb.utils.mkdirhier(dest_dir)
    for s in sources:
        src = oe.path.join(src_dir, s)
        dest = oe.path.join(dest_dir, s)
        if not os.path.exists(src):
            bb.fatal("Path does not exist: %s. Maybe PERF_SRC does not match the kernel version." % src)
        if os.path.isdir(src):
            oe.path.copyhardlinktree(src, dest)
        else:
            bb.utils.copyfile(src, dest)
}

do_configure_prepend () {
    # If building a multlib based perf, the incorrect library path will be
    # detected by perf, since it triggers via: ifeq ($(ARCH),x86_64). In a 32 bit
    # build, with a 64 bit multilib, the arch won't match and the detection of a 
    # 64 bit build (and library) are not exected. To ensure that libraries are
    # installed to the correct location, we can use the weak assignment in the
    # config/Makefile.
    #
    # Also need to relocate .config-detected to $(OUTPUT)/config-detected
    # for kernel sources that do not already do this
    # as two builds (e.g. perf and lib32-perf from mutlilib can conflict
    # with each other if its in the shared source directory
    #
    if [ -e "${S}/tools/perf/config/Makefile" ]; then
        perfconfig="${S}/tools/perf/config/Makefile"
    fi
    if [ -e "${S}/tools/perf/Makefile.config" ]; then
        perfconfig="${S}/tools/perf/Makefile.config"
    fi
    if [ -n "${perfconfig}" ]; then
        # Match $(prefix)/$(lib) and $(prefix)/lib
        sed -i -e 's,^libdir = \($(prefix)/.*lib\),libdir ?= \1,' \
               -e 's,^perfexecdir = \(.*\),perfexecdir ?= \1,' \
               -e 's,\ .config-detected, $(OUTPUT)/config-detected,g' \
            ${perfconfig}
    fi
    # The man pages installation is "$(INSTALL) -d -m 755 $(DESTDIR)$(man1dir)"
    # in ${S}/tools/perf/Documentation/Makefile, if the mandir set to '?=', it
    # will use the relative path 'share/man', in the way it will resulting in
    # incorrect installation for man pages.
    if [ -e "${S}/tools/perf/Documentation/Makefile" ]; then
	sed -i 's,^mandir?=,mandir:=,' ${S}/tools/perf/Documentation/Makefile
    fi
    if [ -e "${S}/tools/perf/Makefile.perf" ]; then
        sed -i -e 's,\ .config-detected, $(OUTPUT)/config-detected,g' \
            ${S}/tools/perf/Makefile.perf
        sed -i -e "s,prefix='\$(DESTDIR_SQ)/usr'$,prefix='\$(DESTDIR_SQ)/usr' --install-lib='\$(DESTDIR)\$(PYTHON_SITEPACKAGES_DIR)',g" \
            ${S}/tools/perf/Makefile.perf
    fi
    sed -i -e "s,--root='/\$(DESTDIR_SQ)',--prefix='\$(DESTDIR_SQ)/usr' --install-lib='\$(DESTDIR)\$(PYTHON_SITEPACKAGES_DIR)',g" \
        ${S}/tools/perf/Makefile*

    if [ -e "${S}/tools/build/Makefile.build" ]; then
        sed -i -e 's,\ .config-detected, $(OUTPUT)/config-detected,g' \
            ${S}/tools/build/Makefile.build
    fi

    # We need to ensure the --sysroot option in CC is preserved
    if [ -e "${S}/tools/perf/Makefile.perf" ]; then
        sed -i 's,CC = $(CROSS_COMPILE)gcc,#CC,' ${S}/tools/perf/Makefile.perf
        sed -i 's,AR = $(CROSS_COMPILE)ar,#AR,' ${S}/tools/perf/Makefile.perf
        sed -i 's,LD = $(CROSS_COMPILE)ld,#LD,' ${S}/tools/perf/Makefile.perf
    fi
    if [ -e "${S}/tools/lib/api/Makefile" ]; then
        sed -i 's,CC = $(CROSS_COMPILE)gcc,#CC,' ${S}/tools/lib/api/Makefile
        sed -i 's,AR = $(CROSS_COMPILE)ar,#AR,' ${S}/tools/lib/api/Makefile
        sed -i 's,LD = $(CROSS_COMPILE)ld,#LD,' ${S}/tools/lib/api/Makefile
    fi
    if [ -e "${S}/tools/lib/subcmd/Makefile" ]; then
        sed -i 's,CC = $(CROSS_COMPILE)gcc,#CC,' ${S}/tools/lib/subcmd/Makefile
        sed -i 's,AR = $(CROSS_COMPILE)ar,#AR,' ${S}/tools/lib/subcmd/Makefile
    fi
    if [ -e "${S}/tools/perf/config/feature-checks/Makefile" ]; then
        sed -i 's,CC := $(CROSS_COMPILE)gcc -MD,CC += -MD,' ${S}/tools/perf/config/feature-checks/Makefile
    fi
    if [ -e "${S}/tools/build/Makefile.feature" ]; then
        sed -i 's,CFLAGS=,CC="\$(CC)" CFLAGS=,' ${S}/tools/build/Makefile.feature
    fi

    # 3.17-rc1+ has a include issue for arm/powerpc. Temporarily sed in the appropriate include
    if [ -e "${S}/tools/perf/arch/$ARCH/util/skip-callchain-idx.c" ]; then
        sed -i 's,#include "util/callchain.h",#include "util/callchain.h"\n#include "util/debug.h",' ${S}/tools/perf/arch/$ARCH/util/skip-callchain-idx.c
    fi
    if [ -e "${S}/tools/perf/arch/arm/util/unwind-libunwind.c" ] && [ -e "${S}/tools/perf/arch/arm/tests/dwarf-unwind.c" ]; then
        sed -i 's,#include "tests/tests.h",#include "tests/tests.h"\n#include "util/debug.h",' ${S}/tools/perf/arch/arm/tests/dwarf-unwind.c
        sed -i 's,#include "perf_regs.h",#include "perf_regs.h"\n#include "util/debug.h",' ${S}/tools/perf/arch/arm/util/unwind-libunwind.c
    fi

    # use /usr/bin/env instead of version specific python
    for s in `find ${S}/tools/perf/scripts/python/ -name '*.py'`; do
        sed -i 's,/usr/bin/python2,/usr/bin/env python,' "${s}"
    done
}

python do_package_prepend() {
    d.setVar('PKGV', d.getVar("KERNEL_VERSION").split("-")[0])
}

PACKAGE_ARCH = "${MACHINE_ARCH}"


PACKAGES =+ "${PN}-archive ${PN}-tests ${PN}-perl ${PN}-python"

RDEPENDS_${PN} += "elfutils bash"
RDEPENDS_${PN}-archive =+ "bash"
RDEPENDS_${PN}-python =+ "bash python python-modules ${@bb.utils.contains('PACKAGECONFIG', 'audit', 'audit-python', '', d)}"
RDEPENDS_${PN}-perl =+ "bash perl perl-modules"
RDEPENDS_${PN}-tests =+ "python"

RSUGGESTS_SCRIPTING = "${@bb.utils.contains('PACKAGECONFIG', 'scripting', '${PN}-perl ${PN}-python', '',d)}"
RSUGGESTS_${PN} += "${PN}-archive ${PN}-tests ${RSUGGESTS_SCRIPTING}"

FILES_SOLIBSDEV = ""
FILES_${PN} += "${libexecdir}/perf-core ${exec_prefix}/libexec/perf-core ${libdir}/traceevent ${libdir}/libperf-jvmti.so"
FILES_${PN}-archive = "${libdir}/perf/perf-core/perf-archive"
FILES_${PN}-tests = "${libdir}/perf/perf-core/tests ${libexecdir}/perf-core/tests"
FILES_${PN}-python = " \
                       ${PYTHON_SITEPACKAGES_DIR} \
                       ${libexecdir}/perf-core/scripts/python \
                       "
FILES_${PN}-perl = "${libexecdir}/perf-core/scripts/perl"


INHIBIT_PACKAGE_DEBUG_SPLIT="1"