plugin: Copy the no_export field to the IR dummy object

Copy the no_export field to the IR dummy object when claiming an IR
object.

	PR ld/25618
	* plugin.c (plugin_object_p): Copy the no_export field to the IR
	dummy object.
	* testsuite/ld-plugin/lto.exp (lto_link_elf_tests): Add
	PR ld/25618 tests.
	* testsuite/ld-plugin/pr25618.d: New file.
	* testsuite/ld-plugin/pr25618a.cc: Likewise.
	* testsuite/ld-plugin/pr25618a.h: Likewise.
	* testsuite/ld-plugin/pr25618b.cc: Likewise.
	* testsuite/ld-plugin/pr25618b.h: Likewise.

8 files changed, 37 insertions, 0 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index 118b5c5..927074e 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,16 @@
+2020-03-01  H.J. Lu  <hongjiu.lu@intel.com>
+
+	PR ld/25618
+	* plugin.c (plugin_object_p): Copy the no_export field to the IR
+	dummy object.
+	* testsuite/ld-plugin/lto.exp (lto_link_elf_tests): Add
+	PR ld/25618 tests.
+	* testsuite/ld-plugin/pr25618.d: New file.
+	* testsuite/ld-plugin/pr25618a.cc: Likewise.
+	* testsuite/ld-plugin/pr25618a.h: Likewise.
+	* testsuite/ld-plugin/pr25618b.cc: Likewise.
+	* testsuite/ld-plugin/pr25618b.h: Likewise.
+
 2020-02-27  Alan Modra  <amodra@gmail.com>
 
 	PR 24511
diff --git a/ld/plugin.c b/ld/plugin.c
index 23a3145..af3f9e2 100644
--- a/ld/plugin.c
+++ b/ld/plugin.c
@@ -1239,6 +1239,7 @@ plugin_object_p (bfd *ibfd)
       ibfd->plugin_format = bfd_plugin_yes;
       ibfd->plugin_dummy_bfd = abfd;
       bfd_make_readable (abfd);
+      abfd->no_export = ibfd->no_export;
       return abfd->xvec;
     }
   else
diff --git a/ld/testsuite/ld-plugin/lto.exp b/ld/testsuite/ld-plugin/lto.exp
index 0243f09..31da465 100644
--- a/ld/testsuite/ld-plugin/lto.exp
+++ b/ld/testsuite/ld-plugin/lto.exp
@@ -368,6 +368,16 @@ set lto_link_elf_tests [list \
    "-O2 -flto -Wl,--as-needed tmpdir/pr25593a-2.o tmpdir/pr25593b.o \
     tmpdir/pr25593c.so tmpdir/pr25593d.so tmpdir/pr25593e.so" "" \
    {dummy.c} {{readelf {-d --wide} pr25593.d}} "pr25593b.exe"] \
+  [list "Build pr25618a.o" \
+   "$plug_opt" "-O2 -flto -fpic" \
+   {pr25618a.cc} {} "" "c++"] \
+  [list "Build pr25618.a" \
+   "$plug_opt" "-O2 -flto -fpic" \
+   {pr25618b.cc} {} "pr25618.a" "c++"] \
+  [list "Build pr25618.so" \
+   "-shared -Wl,--exclude-libs,ALL tmpdir/pr25618a.o tmpdir/pr25618.a" \
+   "-fpic" \
+   {dummy.c} {{readelf {--dyn-syms --wide} pr25618.d}} "pr25618.so" "c++"] \
 ]
 
 # PR 14918 checks that libgcc is not spuriously included in a shared link of
diff --git a/ld/testsuite/ld-plugin/pr25618.d b/ld/testsuite/ld-plugin/pr25618.d
new file mode 100644
index 0000000..2815d92
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr25618.d
@@ -0,0 +1,4 @@
+#failif
+#...
+ +[0-9]+: +[0-9a-f]+ +[0-9a-f]+ +FUNC +GLOBAL +DEFAULT +[0-9]+ +_?_Z3foov
+#...
diff --git a/ld/testsuite/ld-plugin/pr25618a.cc b/ld/testsuite/ld-plugin/pr25618a.cc
new file mode 100644
index 0000000..6d35b3c
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr25618a.cc
@@ -0,0 +1,3 @@
+#include "pr25618a.h"
+#include "pr25618b.h"
+int bar() { return foo(); }
diff --git a/ld/testsuite/ld-plugin/pr25618a.h b/ld/testsuite/ld-plugin/pr25618a.h
new file mode 100644
index 0000000..9bf857c
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr25618a.h
@@ -0,0 +1,2 @@
+#pragma once
+__attribute__((visibility("default"))) int bar();
diff --git a/ld/testsuite/ld-plugin/pr25618b.cc b/ld/testsuite/ld-plugin/pr25618b.cc
new file mode 100644
index 0000000..1d3dff3
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr25618b.cc
@@ -0,0 +1,2 @@
+#include "pr25618b.h"
+int foo() { return 100; }
diff --git a/ld/testsuite/ld-plugin/pr25618b.h b/ld/testsuite/ld-plugin/pr25618b.h
new file mode 100644
index 0000000..cd80074
--- /dev/null
+++ b/ld/testsuite/ld-plugin/pr25618b.h
@@ -0,0 +1,2 @@
+#pragma once
+__attribute__((visibility("default"))) int foo();