From: Ian Munsie Date: Mon, 29 Nov 2010 00:53:07 +0000 (+1100) Subject: perf makefile: Allow strong and weak functions in LIB_OBJS X-Git-Tag: firefly_0821_release~7613^2~2648^2~75 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b38aa89600be39b3e10c5b6529aed2e66518598e;p=firefly-linux-kernel-4.4.55.git perf makefile: Allow strong and weak functions in LIB_OBJS When we build perf we place all of the .o files from the library files (util, arch/x/util, etc) into libperf.a which is then linked into perf. The problem is that the linker will by default only consider .o files within the .a archive if they are necessary to satisfy an unresolved symbol. As weak functions are not unresolved, it will not consider a .o file from the archive containing the strong versions of weak functions unless it requires it for another reason. This patch adds the --whole-archive flags to the linker when passing in the libperf.a file to ensure that it will consider every .o file in the archive, not just what it believes that it needs. The end result is that weak functions can now be overridden by strong variants of them in the libperf.a file. Cc: "tom.leiming" Cc: Ingo Molnar Cc: Paul Mackerras Cc: Peter Zijlstra LKML-Reference: <1290991642-sup-5890@au1.ibm.com> Signed-off-by: Ian Munsie Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/Makefile b/tools/perf/Makefile index d88137a4356e..ac6692cf5508 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile @@ -901,7 +901,7 @@ prefix_SQ = $(subst ','\'',$(prefix)) SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH)) PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH)) -LIBS = $(PERFLIBS) $(EXTLIBS) +LIBS = -Wl,--whole-archive $(PERFLIBS) -Wl,--no-whole-archive $(EXTLIBS) BASIC_CFLAGS += -DSHA1_HEADER='$(SHA1_HEADER_SQ)' \ $(COMPAT_CFLAGS)