Messages in this thread Patch in this message | | | From | David Ahern <> | Subject | [PATCH] perf: fix x86 builds with ARCH specified on the command line | Date | Mon, 27 Aug 2012 13:05:54 -0600 |
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e.g., compiling i386 on x86_64 using: $ make -C tools/perf ARCH=i386
fails with:
CC /tmp/pbuild/util/evsel.o In file included from util/evsel.c:21:0: util/perf_regs.h:5:23: fatal error: perf_regs.h: No such file or directory compilation terminated.
Adding V=1 you see that the include argument for the arch is '-Iarch/i386/include' is wrong. It is supposed to be -Iarch/x86/include per the redefinition of ARCH in the Makefile.
According to the make manual, http://www.gnu.org/software/make/manual/make.html#Override-Directive: "If a variable has been set with a command argument (see Overriding Variables), then ordinary assignments in the makefile are ignored. If you want to set the variable in the makefile even though it was set with a command argument, you can use an override directive ..."
Make it so.
Signed-off-by: David Ahern <dsahern@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Cc: Ingo Molnar <mingo@kernel.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> --- tools/perf/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 722ddee..939cf6d 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -64,12 +64,12 @@ AR = $(CROSS_COMPILE)ar # Additional ARCH settings for x86 ifeq ($(ARCH),i386) - ARCH := x86 + override ARCH := x86 NO_PERF_REGS := 0 LIBUNWIND_LIBS = -lunwind -lunwind-x86 endif ifeq ($(ARCH),x86_64) - ARCH := x86 + override ARCH := x86 IS_X86_64 := 0 ifeq (, $(findstring m32,$(EXTRA_CFLAGS))) IS_X86_64 := $(shell echo __x86_64__ | ${CC} -E -xc - | tail -n 1) -- 1.7.10.1
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