From: Jonathan Wakely <jwakely@redhat.com>
Date: Wed, 4 Jun 2025 19:09:21 +0000 (+0100)
Subject: libstdc++: Adjust effective-target requirements for <barrier> and <semaphore>
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29b2cb40ee848928385a48c4fdeb9b7a2ae0aecd;p=thirdparty%2Fgcc.git

libstdc++: Adjust effective-target requirements for <barrier> and <semaphore>

These features depend on __cpp_lib_atomic_wait which is not available
for freestanding, and is available when either gthreads is supported, or
the target is linux (for futex support).

libstdc++-v3/ChangeLog:

	* testsuite/30_threads/barrier/1.cc: Require hosted. Only
	require gthreads for non-linux targets.
	* testsuite/30_threads/barrier/2.cc: Likewise.
	* testsuite/30_threads/semaphore/1.cc: Likewise.
	* testsuite/30_threads/semaphore/2.cc: Likewise.
	* testsuite/30_threads/semaphore/cons.cc: Likewise.
	* testsuite/30_threads/semaphore/least_max_value_neg.cc:
	Likewise.
	* testsuite/30_threads/semaphore/try_acquire.cc: Likewise.

Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
---

diff --git a/libstdc++-v3/testsuite/30_threads/barrier/1.cc b/libstdc++-v3/testsuite/30_threads/barrier/1.cc
index eff8ef3a174..01c55d96cd2 100644
--- a/libstdc++-v3/testsuite/30_threads/barrier/1.cc
+++ b/libstdc++-v3/testsuite/30_threads/barrier/1.cc
@@ -16,7 +16,8 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do compile { target c++20 } }
-// { dg-require-effective-target gthreads }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
+// { dg-require-effective-target hosted }
 // { dg-add-options no_pch }
 
 #include <barrier>
diff --git a/libstdc++-v3/testsuite/30_threads/barrier/2.cc b/libstdc++-v3/testsuite/30_threads/barrier/2.cc
index e0188b3fd8e..728030babbd 100644
--- a/libstdc++-v3/testsuite/30_threads/barrier/2.cc
+++ b/libstdc++-v3/testsuite/30_threads/barrier/2.cc
@@ -16,7 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do compile { target c++20 } }
-// { dg-require-effective-target gthreads }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
 // { dg-require-effective-target hosted }
 // { dg-add-options no_pch }
 
diff --git a/libstdc++-v3/testsuite/30_threads/semaphore/1.cc b/libstdc++-v3/testsuite/30_threads/semaphore/1.cc
index ac9f97b816f..cc6befcc1a5 100644
--- a/libstdc++-v3/testsuite/30_threads/semaphore/1.cc
+++ b/libstdc++-v3/testsuite/30_threads/semaphore/1.cc
@@ -16,6 +16,8 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do compile { target c++20 } }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
+// { dg-require-effective-target hosted }
 // { dg-add-options no_pch }
 
 #include <semaphore>
diff --git a/libstdc++-v3/testsuite/30_threads/semaphore/2.cc b/libstdc++-v3/testsuite/30_threads/semaphore/2.cc
index 251e96adae6..bff747c0aa3 100644
--- a/libstdc++-v3/testsuite/30_threads/semaphore/2.cc
+++ b/libstdc++-v3/testsuite/30_threads/semaphore/2.cc
@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do compile { target c++20 } }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
 // { dg-require-effective-target hosted }
 // { dg-add-options no_pch }
 
diff --git a/libstdc++-v3/testsuite/30_threads/semaphore/cons.cc b/libstdc++-v3/testsuite/30_threads/semaphore/cons.cc
index 920f7423332..790ff2eab55 100644
--- a/libstdc++-v3/testsuite/30_threads/semaphore/cons.cc
+++ b/libstdc++-v3/testsuite/30_threads/semaphore/cons.cc
@@ -1,4 +1,6 @@
 // { dg-do compile { target c++20 } }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
+// { dg-require-effective-target hosted }
 
 #include <semaphore>
 
diff --git a/libstdc++-v3/testsuite/30_threads/semaphore/least_max_value_neg.cc b/libstdc++-v3/testsuite/30_threads/semaphore/least_max_value_neg.cc
index 1498d38cb93..e2680b12e5a 100644
--- a/libstdc++-v3/testsuite/30_threads/semaphore/least_max_value_neg.cc
+++ b/libstdc++-v3/testsuite/30_threads/semaphore/least_max_value_neg.cc
@@ -16,8 +16,8 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do compile { target c++20 } }
-// { dg-require-effective-target pthread }
-// { dg-require-gthreads "" }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
+// { dg-require-effective-target hosted }
 
 #include <semaphore>
 
diff --git a/libstdc++-v3/testsuite/30_threads/semaphore/try_acquire.cc b/libstdc++-v3/testsuite/30_threads/semaphore/try_acquire.cc
index d709126cf34..ea7859b22c6 100644
--- a/libstdc++-v3/testsuite/30_threads/semaphore/try_acquire.cc
+++ b/libstdc++-v3/testsuite/30_threads/semaphore/try_acquire.cc
@@ -17,7 +17,8 @@
 
 // { dg-do run { target c++20 } }
 // { dg-additional-options "-pthread" { target pthread } }
-// { dg-require-gthreads "" }
+// { dg-require-effective-target gthreads { target { ! *-*-linux* } } }
+// { dg-require-effective-target hosted }
 // { dg-add-options libatomic }
 
 #include <semaphore>