Solaris2/LD: Fix anonymous version script acceptance bug

Correct a bug in Solaris 2 linker emulation code triggered by a test
introduced with commit 81ff47b3a546 ("PR ld/20828: Fix linker script
symbols wrongly forced local with section GC") and only create implicit
version nodes if versioning is actually introduced with a version script
(or VERSION command) rather than only global vs local symbol visibility
selected, fixing an:

ld: anonymous version tag cannot be combined with other version tags

linker error produced whenever a version script (or VERSION command) is
used that does not assign symbol versions, such as:

{ global: foo; bar; local: *; };

and consequently removing a:

FAIL: PR ld/20828 dynamic symbols with section GC (version script)

test suite failure with the `x86_64-solaris2' target.

	ld/
	* emultempl/solaris2.em (elf_solaris2_before_allocation): Do not
	add implicit version nodes if an anonymous version tag is being
	used.

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 941ca13..9160aac 100644 (file)
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,9 @@
+2017-01-24  Maciej W. Rozycki  <macro@imgtec.com>
+
+       * emultempl/solaris2.em (elf_solaris2_before_allocation): Do not
+       add implicit version nodes if an anonymous version tag is being
+       used.
+
 2017-01-24  Jiong Wang  <jiong.wang@arm.com>
 
        * testsuite/ld-plugin/lto.exp (lto_link_elf_tests): Move "Compile 7",

diff --git a/ld/emultempl/solaris2.em b/ld/emultempl/solaris2.em
index 9845047..c5f2f31 100644 (file)
--- a/ld/emultempl/solaris2.em
+++ b/ld/emultempl/solaris2.em
@@ -76,7 +76,8 @@ elf_solaris2_before_allocation (void)
 
   /* Only do this if emitting a shared object and versioning is in place. */
   if (bfd_link_dll (&link_info)
-      && (link_info.version_info != NULL
+      && ((link_info.version_info != NULL
+          && link_info.version_info->name[0] != '\0')
          || link_info.create_default_symver))
     {
       struct bfd_elf_version_expr *globals = NULL, *locals = NULL;