[tip: perf/urgent] perf jvmti: Link against tools/lib/ctype.h to have weak strlcpy()

[tip-bot2 for Thomas Richter]

The following commit has been merged into the perf/urgent branch of tip:

Commit-ID:     6a6fac11b11299aa5bd8532ea863fc2f652af2b6
Gitweb:        https://git.kernel.org/tip/6a6fac11b11299aa5bd8532ea863fc2f652af2b6
Author:        Thomas Richter <tmricht@xxxxxxxxxxxxx>
AuthorDate:    Tue, 08 Oct 2019 11:38:41 +02:00
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Tue, 15 Oct 2019 11:47:38 -03:00

perf jvmti: Link against tools/lib/ctype.h to have weak strlcpy()

The build of file libperf-jvmti.so succeeds but the resulting
object fails to load:

 # ~/linux/tools/perf/perf record -k mono -- java  \
      -XX:+PreserveFramePointer \
      -agentpath:/root/linux/tools/perf/libperf-jvmti.so \
       hog 100000 123450
  Error occurred during initialization of VM
  Could not find agent library /root/linux/tools/perf/libperf-jvmti.so
      in absolute path, with error:
      /root/linux/tools/perf/libperf-jvmti.so: undefined symbol: _ctype

Add the missing _ctype symbol into the build script.

Fixes: 79743bc927f6 ("perf jvmti: Link against tools/lib/string.o to have weak strlcpy()")
Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20191008093841.59387-1-tmricht@xxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/jvmti/Build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/jvmti/Build b/tools/perf/jvmti/Build
index 1e148bb..202cada 100644
--- a/tools/perf/jvmti/Build
+++ b/tools/perf/jvmti/Build
@@ -2,7 +2,7 @@ jvmti-y += libjvmti.o
 jvmti-y += jvmti_agent.o
 
 # For strlcpy
-jvmti-y += libstring.o
+jvmti-y += libstring.o libctype.o
 
 CFLAGS_jvmti         = -fPIC -DPIC -I$(JDIR)/include -I$(JDIR)/include/linux
 CFLAGS_REMOVE_jvmti  = -Wmissing-declarations
@@ -15,3 +15,7 @@ CFLAGS_libstring.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PE
 $(OUTPUT)jvmti/libstring.o: ../lib/string.c FORCE
 	$(call rule_mkdir)
 	$(call if_changed_dep,cc_o_c)
+
+$(OUTPUT)jvmti/libctype.o: ../lib/ctype.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,cc_o_c)