[PATCH] tests: Add -ldl to dwfl_proc_attach_LDFLAGS

[Mark Wielaard]

dwfl-proc-attach uses (overrides) dlopen (so it does nothing).  This
seems to cause a versioned dlopen symbol to be pulled in when building
with LTO. Resulting in a link failure (when dlopen isn't integrated
into libc):

/usr/bin/ld: dwfl-proc-attach.o (symbol from plugin): undefined
reference to symbol 'dlopen@@GLIBC_2.2.5'
/usr/bin/ld: /usr/lib64/libdl.so.2: error adding symbols: DSO missing
from command line collect2: error: ld returned 1 exit status

So simply explicitly add -ldl to the LDFLAGS.

Signed-off-by: Mark Wielaard <mark@klomp.org>
---
 tests/ChangeLog   | 4 ++++
 tests/Makefile.am | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tests/ChangeLog b/tests/ChangeLog
index a59cdd51..97cb3fa3 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,7 @@
+2021-11-18  Mark Wielaard  <mark@klomp.org>
+
+	* Makefile.am (dwfl_proc_attach_LDFLAGS): Add -ldl.
+
 2021-11-05  Frank Ch. Eigler  <fche@redhat.com>
 
 	PR28430
diff --git a/tests/Makefile.am b/tests/Makefile.am
index bfb8b13a..f212f9fb 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -717,7 +717,7 @@ strptr_LDADD = $(libelf)
 newdata_LDADD = $(libelf)
 elfstrtab_LDADD = $(libelf)
 dwfl_proc_attach_LDADD = $(libdw)
-dwfl_proc_attach_LDFLAGS = -pthread $(AM_LDFLAGS)
+dwfl_proc_attach_LDFLAGS = -pthread -ldl $(AM_LDFLAGS)
 elfshphehdr_LDADD =$(libelf)
 elfstrmerge_LDADD = $(libdw) $(libelf)
 dwelfgnucompressed_LDADD = $(libelf) $(libdw)
-- 
2.30.2