Commit 60d526f7 authored Oct 20, 2009 by Steven Rostedt Committed by Ingo Molnar Oct 21, 2009

perf tools: Add 'make DEBUG=1' to remove the -O6 cflag



When using gdb to debug perf, it is practically impossible to
use when perf is compiled with -O6. For developers, this patch
adds the DEBUG feature to the make command line so that a
developer can easily remove the optimization flag.

LKML-Reference: <1255590330.8392.446.camel@twins>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091020232033.984323261@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent c88e4bf6

tools/perf/Makefile

+8 −1

Original line number	Diff line number	Diff line
		@@ -201,7 +201,14 @@ EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wold-style-definition
		EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wstrict-prototypes
		EXTRA_WARNINGS := $(EXTRA_WARNINGS) -Wdeclaration-after-statement

		CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror -O6 -fstack-protector-all -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
		ifeq ("$(origin DEBUG)", "command line")
		PERF_DEBUG = $(DEBUG)
		endif
		ifndef PERF_DEBUG
		CFLAGS_OPTIMIZE = -O6
		endif

		CFLAGS = $(MBITS) -ggdb3 -Wall -Wextra -std=gnu99 -Werror $(CFLAGS_OPTIMIZE) -fstack-protector-all -D_FORTIFY_SOURCE=2 $(EXTRA_WARNINGS)
		LDFLAGS = -lpthread -lrt -lelf -lm
		ALL_CFLAGS = $(CFLAGS)
		ALL_LDFLAGS = $(LDFLAGS)