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    Subject[tip:perfcounters/core] perf_counter: tools: Makefile tweaks for 64-bit powerpc
    Commit-ID:  e24a72c4d8f0b2c17783b3ba9c8931b537149423
    Author: Paul Mackerras <>
    AuthorDate: Wed, 17 Jun 2009 21:54:26 +1000
    Committer: Ingo Molnar <>
    CommitDate: Thu, 18 Jun 2009 11:11:47 +0200

    perf_counter: tools: Makefile tweaks for 64-bit powerpc

    On 64-bit powerpc, perf needs to be built as a 64-bit executable.
    This arranges to add the -m64 flag to CFLAGS if we are running on
    a 64-bit machine, indicated by the result of uname -m ending in "64".
    This means that we'll use -m64 on x86_64 machines as well.

    Signed-off-by: Paul Mackerras <>
    Cc: Peter Zijlstra <>
    LKML-Reference: <>
    Signed-off-by: Ingo Molnar <>

    tools/perf/Makefile | 7 ++++++-
    1 files changed, 6 insertions(+), 1 deletions(-)

    diff --git a/tools/perf/Makefile b/tools/perf/Makefile
    index e8346f9..714db73 100644
    --- a/tools/perf/Makefile
    +++ b/tools/perf/Makefile
    @@ -157,9 +157,14 @@ uname_R := $(shell sh -c 'uname -r 2>/dev/null || echo not')
    uname_P := $(shell sh -c 'uname -p 2>/dev/null || echo not')
    uname_V := $(shell sh -c 'uname -v 2>/dev/null || echo not')

    +# If we're on a 64-bit kernel, use -m64
    +ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M))
    + M64 := -m64
    # CFLAGS and LDFLAGS are for the users to override from the command line.

    -CFLAGS = -ggdb3 -Wall -Werror -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement -O6
    +CFLAGS = $(M64) -ggdb3 -Wall -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -std=gnu99 -Wdeclaration-after-statement -O6
    LDFLAGS = -lpthread -lrt -lelf -lm

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