[gcc/devel/omp/gcc-10] testsuite: Support { target c++20 } in tests.

[Tobias Burnus]

https://gcc.gnu.org/g:c1eb1c4d82edf368a6f7573bfc8d659ad4ddd499

commit c1eb1c4d82edf368a6f7573bfc8d659ad4ddd499
Author: Jason Merrill <jason@redhat.com>
Date:   Mon May 25 18:04:39 2020 -0400

    testsuite: Support { target c++20 } in tests.
    
    gcc/testsuite/ChangeLog
    2020-05-12  Jason Merrill  <jason@redhat.com>
    
            * lib/target-supports.exp (check_effective_target_c++20_only)
            (check_effective_target_c++20): New.

Diff:
---
 gcc/testsuite/ChangeLog               | 5 +++++
 gcc/testsuite/lib/target-supports.exp | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 58f7e2f7876..d72f22e59a3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-05-25  Jason Merrill  <jason@redhat.com>
+
+	* lib/target-supports.exp (check_effective_target_c++20_only)
+	(check_effective_target_c++20): New.
+
 2020-05-24  Uroš Bizjak  <ubizjak@gmail.com>
 
 	PR target/95255
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 13761491e63..50c88695cbb 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -9134,6 +9134,14 @@ proc check_effective_target_c++2a { } {
     return [check_effective_target_c++2a_only]
 }
 
+proc check_effective_target_c++20_only { } {
+    return [check_effective_target_c++2a_only]
+}
+
+proc check_effective_target_c++20 { } {
+    return [check_effective_target_c++2a]
+}
+
 # Check for C++ Concepts support, i.e. -fconcepts flag.
 proc check_effective_target_concepts { } {
     if [check_effective_target_c++2a] {