[PATCH] testsuite, darwin: improve check for -shared support

[FX Coudert <fxcoudert@gmail.com>]

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The undefined symbols are allowed for C checks, but when
this is run as C++, the mangled foo() symbol is still
seen as undefined, and the testsuite thinks darwin does not
support -shared.

Pushed after approval by Iain Sandoe in PR114233

FX



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From 0ed6e5b4820e01fa86b48a7b1d62f752ec97ea41 Mon Sep 17 00:00:00 2001
From: Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
Date: Thu, 7 Mar 2024 17:27:17 +0100
Subject: [PATCH] testsuite, darwin: improve check for -shared support

The undefined symbols are allowed for C checks, but when
this is run as C++, the mangled foo() symbol is still
seen as undefined, and the testsuite thinks darwin does not
support -shared.

gcc/testsuite/ChangeLog:

	PR target/114233
	* lib/target-supports.exp: Fix test for C++.
---
 gcc/testsuite/lib/target-supports.exp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index ae33c4f1e3a..467b539b20d 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -1390,7 +1390,7 @@ proc check_effective_target_shared { } {
     # here to be undefined.
     set extra_flags ""
     if { [istarget *-*-darwin\[912\]*] } {
-      set extra_flags "-Wl,-U,_foo,-U,_bar"
+      set extra_flags "-Wl,-U,_foo,-U,_bar,-U,__Z3foov"
     }
     # Note that M68K has a multilib that supports -fpic but not
     # -fPIC, so we need to check both.  We test with a program that
-- 
2.39.3 (Apple Git-146)