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authorMichael S. Tsirkin <mst@redhat.com>2009-11-22 14:13:35 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-05-09 15:55:29 -0700
commitd14085b73f362c8cdcc20a39276f5fcf9c8979f0 (patch)
tree8119f2adc56ca8000c7b68baf2bc1e80cc229aef /tools
parentd3a9ac6ecf0b900696da35c5fc8b5f116fda1077 (diff)
perf: Use default compiler mode by default
commit 81516c5fc83a13a1d12f466aa7e14f5fd62a63ce upstream. gcc with no flags typically is a sane default for systems to use, and looking at the running kernel is probably broken for cross-builds anyway, so let's not do this. Add EXTRA_CFLAGS so that users can override default gcc mode if they want to. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Arjan van de Ven <arjan@infradead.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <20091122121335.GA24254@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> [bwh: Backport to 2.6.32] Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Makefile18
1 files changed, 3 insertions, 15 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 0a14f98f9dd2..1b2f98f77ac2 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -148,6 +148,8 @@ all::
# broken, or spawning external process is slower than built-in grep perf has).
#
# Define LDFLAGS=-static to build a static binary.
+#
+# Define EXTRA_CFLAGS=-m64 or EXTRA_CFLAGS=-m32 as appropriate for cross-builds.
PERF-VERSION-FILE: .FORCE-PERF-VERSION-FILE
@$(SHELL_PATH) util/PERF-VERSION-GEN
@@ -160,20 +162,6 @@ 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.
#
@@ -210,7 +198,7 @@ ifndef PERF_DEBUG
CFLAGS_OPTIMIZE = -O6
endif
-CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
+CFLAGS = -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS) $(EXTRA_CFLAGS)
EXTLIBS = -lpthread -lrt -lelf -lm
ALL_CFLAGS = $(CFLAGS)
ALL_LDFLAGS = $(LDFLAGS)