elf: Skip the archive if the symbol isn't referenced

Also skip the archive if the symbol isn't referenced by a regular object.

bfd/

	PR ld/31644
	* elflink.c (elf_link_add_archive_symbols): Also skip the archive
	if the symbol isn't referenced by a regular object.

ld/

	PR ld/31644
	* testsuite/ld-plugin/lto.exp: Run PR ld/31644 tests.
	* testsuite/ld-plugin/pr31644a.c: New test.
	* testsuite/ld-plugin/pr31644b.c: Likewise.
	* testsuite/ld-plugin/pr31644c.c: Likewise.

4 files changed, 49 insertions, 0 deletions

diff --git a/ld/testsuite/ld-plugin/lto.exp b/ld/testsuite/ld-plugin/lto.exp
index 35ce387..7b4b349 100644
--- a/ld/testsuite/ld-plugin/lto.exp
+++ b/ld/testsuite/ld-plugin/lto.exp
@@ -579,6 +579,22 @@ set lto_link_elf_tests [list \
    "" \
    "pr31615d.so" \
   ] \
+  [list \
+   "Build pr31644b.a" \
+   "" \
+   "" \
+   {pr31644b.c} \
+   "" \
+   "pr31644b.a" \
+  ] \
+  [list \
+   "Build pr31644c.so" \
+   "-shared" \
+   "-fPIC" \
+   {pr31644c.c} \
+   "" \
+   "pr31644c.so" \
+  ] \
 ]
 
 # PR 14918 checks that libgcc is not spuriously included in a shared link of
@@ -788,6 +804,14 @@ set lto_run_elf_shared_tests [list \
    {pr31615a.c} {pr31615b.exe} {pass.out} {-O3 -flto} {c} {} \
    {-Wl,--as-needed tmpdir/pr31615c.so -Wl,--no-as-needed \
     tmpdir/pr31615d.so}] \
+  [list {pr31644a} \
+   {-Wl,-R,tmpdir} {} \
+   {pr31644a.c} {pr31644a.exe} {pass.out} {-flto} {c} {} \
+   {-Wl,--no-as-needed tmpdir/pr31644b.a tmpdir/pr31644c.so}] \
+  [list {pr31644b} \
+   {-Wl,-R,tmpdir} {} \
+   {pr31644a.c} {pr31644b.exe} {pass.out} {-flto} {c} {} \
+   {-Wl,--as-needed tmpdir/pr31644b.a tmpdir/pr31644c.so}] \
 ]
 
 # LTO run-time tests for ELF
diff --git a/ld/testsuite/ld-plugin/pr31644a.c b/ld/testsuite/ld-plugin/pr31644a.c
new file mode 100644
index 0000000..1c03a95
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr31644a.c
@@ -0,0 +1,13 @@
+#include <stdio.h>
+
+void
+bar (void)
+{
+}
+
+int
+main()
+{
+  printf ("PASS\n");
+  return 0;
+}
diff --git a/ld/testsuite/ld-plugin/pr31644b.c b/ld/testsuite/ld-plugin/pr31644b.c
new file mode 100644
index 0000000..8b23ec8
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr31644b.c
@@ -0,0 +1,7 @@
+extern void bar (void);
+
+void
+foo (void)
+{
+  bar ();
+}
diff --git a/ld/testsuite/ld-plugin/pr31644c.c b/ld/testsuite/ld-plugin/pr31644c.c
new file mode 100644
index 0000000..3d54205
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr31644c.c
@@ -0,0 +1,5 @@
+__attribute__ ((weak))
+void
+foo (void)
+{
+}