From 8caf140db24116e8874099291a7a48644c368ab6 Mon Sep 17 00:00:00 2001
From: Tom de Vries <tdevries@suse.de>
Date: Sat, 2 May 2020 09:50:50 +0200
Subject: [PATCH] [gdb/testsuite] Update psym-external-decl.exp for
 gcc-10/clang

When running test-case gdb.base/psym-external-decl.exp with gcc-10, we have:
...
(gdb) print aaa^M
'aaa' has unknown type; cast it to its declared type^M
(gdb) FAIL: gdb.base/psym-external-decl.exp: print aaa
...

With an an earlier version, gcc still emits the debug info for the
declaration of aaa:
...
 <0><d2>: Abbrev Number: 1 (DW_TAG_compile_unit)
    <d8>   DW_AT_name        : psym-external-decl.c
 <1><f4>: Abbrev Number: 2 (DW_TAG_variable)
    <f5>   DW_AT_name        : aaa
    <ff>   DW_AT_external    : 1
    <ff>   DW_AT_declaration : 1
...
but with gcc-10 that's no longer the case.

Fix the test-case by adding a use of aaa in psym-external-decl.c.

That still doesn't work for clang, so skip test in that case.

Tested with x86_64-linux, with gcc 7.5.0, gcc 10.0.0 and clang 5.0.2.

Also tested by reverting corresponding fix and ensuring test-case still
fails.

gdb/testsuite/ChangeLog:

2020-05-02  Tom de Vries  <tdevries@suse.de>

	* gdb.base/psym-external-decl.c (main): Add use of variable aaa.
---
 gdb/testsuite/ChangeLog                       | 4 ++++
 gdb/testsuite/gdb.base/psym-external-decl.c   | 2 +-
 gdb/testsuite/gdb.base/psym-external-decl.exp | 5 +++++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 737caffa0ea..e741fd6a7d8 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-02  Tom de Vries  <tdevries@suse.de>
+
+	* gdb.base/psym-external-decl.c (main): Add use of variable aaa.
+
 2020-05-01  Tom de Vries  <tdevries@suse.de>
 
 	* gdb.ada/operator_bp.exp: Allow more than required amount of
diff --git a/gdb/testsuite/gdb.base/psym-external-decl.c b/gdb/testsuite/gdb.base/psym-external-decl.c
index 7a4b1077741..e2374327bde 100644
--- a/gdb/testsuite/gdb.base/psym-external-decl.c
+++ b/gdb/testsuite/gdb.base/psym-external-decl.c
@@ -20,6 +20,6 @@ extern int aaa;
 int
 main (void)
 {
-  return 0;
+  return aaa;
 }
 
diff --git a/gdb/testsuite/gdb.base/psym-external-decl.exp b/gdb/testsuite/gdb.base/psym-external-decl.exp
index bbcc2745755..d0388d5655e 100644
--- a/gdb/testsuite/gdb.base/psym-external-decl.exp
+++ b/gdb/testsuite/gdb.base/psym-external-decl.exp
@@ -15,6 +15,11 @@
 
 standard_testfile .c psym-external-decl-2.c
 
+get_compiler_info
+if { [test_compiler_info "clang-*"] } {
+    return -1
+}
+
 set srcfiles [list $srcfile $srcfile2]
 
 if { [build_executable_from_specs \
-- 
2.30.2