Commit cb281fea authored Jul 18, 2017 by David Carrillo-Cisneros Committed by Arnaldo Carvalho de Melo Jul 25, 2017

perf tools: Add EXCLUDE_EXTLIBS and EXTRA_PERFLIBS to makefile



The goal is to allow users to override linking of libraries that
were automatically added to PERFLIBS.

EXCLUDE_EXTLIBS contains linker flags to be removed from LIBS
while EXTRA_PERFLIBS contains linker flags to be added.

My use case is to force certain library to be build statically,
e.g. for libelf:

  EXCLUDE_EXTLIBS=-lelf EXTRA_PERFLIBS=path/libelf.a

Signed-off-by: David Carrillo-Cisneros <davidcc@google.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: Kees Kook <keescook@chromium.org>
Cc: Paul Turner <pjt@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20170719011839.99399-3-davidcc@google.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent cd8dd032

tools/perf/Makefile.perf

+7 −1

Original line number	Diff line number	Diff line
		@@ -33,6 +33,11 @@ include ../scripts/utilities.mak
		#
		# Define EXTRA_CFLAGS=-m64 or EXTRA_CFLAGS=-m32 as appropriate for cross-builds.
		#
		# Define EXCLUDE_EXTLIBS=-lmylib to exclude libmylib from the auto-generated
		# EXTLIBS.
		#
		# Define EXTRA_PERFLIBS to pass extra libraries to PERFLIBS.
		#
		# Define NO_DWARF if you do not want debug-info analysis feature at all.
		#
		# Define WERROR=0 to disable treating any warnings as errors.
		@@ -352,7 +357,8 @@ ifdef ASCIIDOC8
		export ASCIIDOC8
		endif

		LIBS = -Wl,--whole-archive $(PERFLIBS) -Wl,--no-whole-archive -Wl,--start-group $(EXTLIBS) -Wl,--end-group
		EXTLIBS := $(call filter-out,$(EXCLUDE_EXTLIBS),$(EXTLIBS))
		LIBS = -Wl,--whole-archive $(PERFLIBS) $(EXTRA_PERFLIBS) -Wl,--no-whole-archive -Wl,--start-group $(EXTLIBS) -Wl,--end-group

		ifeq ($(USE_CLANG), 1)
		CLANGLIBS_LIST = AST Basic CodeGen Driver Frontend Lex Tooling Edit Sema Analysis Parse Serialization

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