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    Subject[PATCH 21/29] tools gpio: Allow overriding CFLAGS
    Date
    From: Jiri Olsa <jolsa@kernel.org>

    So that the user can specify outside CFLAGS values.

    Signed-off-by: Jiri Olsa <jolsa@kernel.org>
    Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
    Cc: Hartmut Knaack <knaack.h@gmx.de> <knaack.h@gmx.de>
    Cc: Herton Krzesinski <herton@redhat.com>
    Cc: Jonathan Cameron <jic23@kernel.org>
    Cc: Lars-Peter Clausen <lars@metafoo.de>
    Link: http://lkml.kernel.org/r/20181212102537.25902-7-jolsa@kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/gpio/Makefile | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/tools/gpio/Makefile b/tools/gpio/Makefile
    index 240eda014b37..6ecdd1067826 100644
    --- a/tools/gpio/Makefile
    +++ b/tools/gpio/Makefile
    @@ -12,7 +12,7 @@ endif
    # (this improves performance and avoids hard-to-debug behaviour);
    MAKEFLAGS += -r

    -CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include
    +override CFLAGS += -O2 -Wall -g -D_GNU_SOURCE -I$(OUTPUT)include

    ALL_TARGETS := lsgpio gpio-hammer gpio-event-mon
    ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
    --
    2.19.2
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