[PATCH] tools/lib/perf: make the static libperf complete

[Jinshan Xiong]

This patch makes libperf.a complete. Initially it misses the symbols
fdarray_* that makes it unusable:
   $ nm tools/lib/perf/libperf.a | grep fdarray_
                    U fdarray__add
   0000000000002b3e t fdarray__available_entries
                    U fdarray__exit
                    U fdarray__filter
                    U fdarray__grow
                    U fdarray__init
                    U fdarray__poll

After this patch is applied:
    $ nm tools/lib/perf/libperf.a | grep fdarray_
    00000000000063f7 T fdarray__add
    ......
    00000000000065d4 T fdarray__poll

Signed-off-by: "Jinshan Xiong" <jinshan.xiong@xxxxxxxxx>
---
 tools/lib/perf/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/perf/Makefile b/tools/lib/perf/Makefile
index 08fe6e3c4089..840366584fc1 100644
--- a/tools/lib/perf/Makefile
+++ b/tools/lib/perf/Makefile
@@ -121,8 +121,8 @@ $(LIBAPI)-clean:
 $(LIBPERF_IN): FORCE
 	$(Q)$(MAKE) $(build)=libperf
 
-$(LIBPERF_A): $(LIBPERF_IN)
-	$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(LIBPERF_IN)
+$(LIBPERF_A): $(LIBPERF_IN) $(LIBAPI)
+	$(QUIET_AR)$(RM) $@ && $(LD) -r -o libperf-ar.o $^ && $(AR) rcs $@ libperf-ar.o
 
 $(LIBPERF_SO): $(LIBPERF_IN) $(LIBAPI)
 	$(QUIET_LINK)$(CC) --shared -Wl,-soname,libperf.so \
-- 
2.30.2