linux-kernel - [PATCH] libtraceevent: Add dependency on libdl

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Message-Id: <20191226224931.3458-1-sudipm.mukherjee@gmail.com>
Date:   Thu, 26 Dec 2019 22:49:31 +0000
From:   Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:     rostedt@...dmis.org, Arnaldo Carvalho de Melo <acme@...hat.com>,
        arnaldo.melo@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-trace-devel@...r.kernel.org,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH] libtraceevent: Add dependency on libdl

event-plugin.c is calling dl_*() functions but it is not linked with
libdl. As a result when we use ldd on the generated libtraceevent.so
file, it does not list libdl as one of its dependencies.
Add -ldl explicitly as done in tools/lib/lockdep.

Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
---
 tools/lib/traceevent/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/Makefile b/tools/lib/traceevent/Makefile
index c874c017c636..0d0575981cc7 100644
--- a/tools/lib/traceevent/Makefile
+++ b/tools/lib/traceevent/Makefile
@@ -143,7 +143,7 @@ $(TE_IN): force
 	$(Q)$(MAKE) $(build)=libtraceevent
 
 $(OUTPUT)libtraceevent.so.$(EVENT_PARSE_VERSION): $(TE_IN)
-	$(QUIET_LINK)$(CC) --shared $(LDFLAGS) $^ -Wl,-soname,libtraceevent.so.$(EP_VERSION) -o $@
+	$(QUIET_LINK)$(CC) --shared $(LDFLAGS) $^ -ldl -Wl,-soname,libtraceevent.so.$(EP_VERSION) -o $@
 	@ln -sf $(@F) $(OUTPUT)libtraceevent.so
 	@ln -sf $(@F) $(OUTPUT)libtraceevent.so.$(EP_VERSION)
 
-- 
2.11.0