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Date: Tue, 1 Dec 2009 20:11:50 +0000 From: Jamie Iles <jamie@...ieiles.com> To: linux-kernel@...r.kernel.org Cc: Jamie Iles <jamie@...ieiles.com>, Peter Zijlstra <a.p.zijlstra@...llo.nl> Subject: [PATCH] perf tools: allow cross compiling of perf tools For embedded systems we need to cross compile applications on the build machine. Use the CROSS_COMPILE variable like the kernel itself. Additionally, we can't use uname to determine whether we should build for 64 bit. Use the -dumpmachine flag of GCC to determine the target arch. Signed-off-by: Jamie Iles <jamie@...ieiles.com> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl> --- tools/perf/Makefile | 56 ++++++++++++++++++++++++++++++--------------------- 1 files changed, 33 insertions(+), 23 deletions(-) diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 7e190d5..aed4812 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -150,27 +150,6 @@ PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE @$(SHELL_PATH) util/PERF-VERSION-GEN -include PERF-VERSION-FILE -uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not') -uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not') -uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not') -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 := $(shell sh -c 'uname -v 2>/dev/null || echo not') - -# -# Add -m32 for cross-builds: -# -ifdef NO_64BIT - MBITS := -m32 -else - # - # If we're on a 64-bit kernel, use -m64: - # - ifneq ($(patsubst %64,%,$(uname_M)),$(uname_M)) - MBITS := -m64 - endif -endif - # CFLAGS and LDFLAGS are for the users to override from the command line. # @@ -239,8 +218,16 @@ lib = lib export prefix bindir sharedir sysconfdir -CC = gcc -AR = ar +# CROSS_COMPILE specify the prefix used for all executables used +# during compilation. Only gcc and related bin-utils executables +# are prefixed with $(CROSS_COMPILE). +# CROSS_COMPILE can be set on the command line +# make CROSS_COMPILE=ia64-linux- +# Alternatively CROSS_COMPILE can be set in the environment. +# Default value for CROSS_COMPILE is not to prefix executables +CROSS_COMPILE ?= +CC = $(CROSS_COMPILE)gcc +AR = $(CROSS_COMPILE)ar RM = rm -f TAR = tar FIND = find @@ -252,6 +239,29 @@ PTHREAD_LIBS = -lpthread # explicitly what architecture to check for. Fix this up for yours.. SPARSE_FLAGS = -D__BIG_ENDIAN__ -D__powerpc__ +uname_S := $(shell sh -c 'uname -s 2>/dev/null || echo not') +uname_M := $(shell sh -c 'uname -m 2>/dev/null || echo not') +uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not') +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') +machine := $(shell sh -c '$(CC) -dumpmachine | cut -d- -f1') + +# +# Add -m32 for cross-builds: +# Note: not all architectures have a -m32/-m64 so only define it if we +# explicitly force to 32 bits or detect a 64 bit arch. +# +ifdef FORCE_32BIT + MBITS := -m32 +else + # + # If we're on a 64-bit kernel, use -m64: + # + ifneq ($(patsubst %64,%,$(machine)),$(machine)) + MBITS := -m64 + endif +endif ### --- END CONFIGURATION SECTION --- -- 1.6.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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