libstdc++: Remove dg-options "-std=gnu++20" from remaining tests

The testsuite will automatically select C++20 for these tests now, and
removing the hardcoded -std option allows them to be tested for C++23
and C++26 as well.

libstdc++-v3/ChangeLog:

	* testsuite/18_support/coroutines/95917.cc: Remove dg-options
	-std=gnu++2a.
	* testsuite/18_support/coroutines/hash.cc: Likewise.
	* testsuite/18_support/coroutines/lwg3460.cc: Likewise.
	* testsuite/18_support/destroying_delete.cc: Likewise.
	* testsuite/18_support/source_location/1.cc: Likewise.
	* testsuite/18_support/source_location/consteval.cc: Likewise.
	* testsuite/18_support/source_location/version.cc: Likewise.
	* testsuite/19_diagnostics/error_category/operators/three_way.cc:
	Likewise.
	* testsuite/19_diagnostics/error_code/operators/three_way.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/operators/three_way.cc:
	Likewise.
	* testsuite/19_diagnostics/stacktrace/output.cc: Likewise.
	* testsuite/26_numerics/adjacent_difference/lwg2055.cc:
	Likewise.
	* testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
	* testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
	* testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: Likewise.
	* testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc:
	Likewise.
	* testsuite/28_regex/iterators/regex_iterator/lwg3719.cc:
	Likewise.
	* testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc:
	Likewise.
	* testsuite/28_regex/sub_match/compare_c++20.cc: Likewise.
	* testsuite/experimental/filesystem/iterators/106201.cc:
	Likewise.
	* testsuite/experimental/scopeguard/exit.cc: Likewise.
	* testsuite/experimental/scopeguard/uniqueres.cc: Likewise.

24 files changed, 21 insertions, 43 deletions

diff --git a/libstdc++-v3/testsuite/18_support/coroutines/95917.cc b/libstdc++-v3/testsuite/18_support/coroutines/95917.cc
index f6f85f4..8ee56ef 100644
--- a/libstdc++-v3/testsuite/18_support/coroutines/95917.cc
+++ b/libstdc++-v3/testsuite/18_support/coroutines/95917.cc
@@ -15,8 +15,8 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a -g0" }
-// { dg-do compile { target c++2a } }
+// { dg-options "-g0" }
+// { dg-do compile { target c++20 } }
 // { dg-final { scan-assembler-not "dummy_resume_destroy" } }
 // { dg-final { scan-assembler-not "noop_coro" } }
 
diff --git a/libstdc++-v3/testsuite/18_support/coroutines/hash.cc b/libstdc++-v3/testsuite/18_support/coroutines/hash.cc
index 81b68f8..bddea03 100644
--- a/libstdc++-v3/testsuite/18_support/coroutines/hash.cc
+++ b/libstdc++-v3/testsuite/18_support/coroutines/hash.cc
@@ -1,5 +1,4 @@
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <coroutine>
 #include <testsuite_hooks.h>
diff --git a/libstdc++-v3/testsuite/18_support/coroutines/lwg3460.cc b/libstdc++-v3/testsuite/18_support/coroutines/lwg3460.cc
index 1d4b6d2..84f1ea2 100644
--- a/libstdc++-v3/testsuite/18_support/coroutines/lwg3460.cc
+++ b/libstdc++-v3/testsuite/18_support/coroutines/lwg3460.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <coroutine>
 
diff --git a/libstdc++-v3/testsuite/18_support/destroying_delete.cc b/libstdc++-v3/testsuite/18_support/destroying_delete.cc
index 4012ddd..2ee9272 100644
--- a/libstdc++-v3/testsuite/18_support/destroying_delete.cc
+++ b/libstdc++-v3/testsuite/18_support/destroying_delete.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <new>
 #include <type_traits>
diff --git a/libstdc++-v3/testsuite/18_support/source_location/1.cc b/libstdc++-v3/testsuite/18_support/source_location/1.cc
index 0898c9e..48707b3 100644
--- a/libstdc++-v3/testsuite/18_support/source_location/1.cc
+++ b/libstdc++-v3/testsuite/18_support/source_location/1.cc
@@ -18,8 +18,8 @@
 // Example from C++ Standard Working Draft N4842, November 2019 Mailing
 // Adapted for testing.
 
-// { dg-options "-std=gnu++2a -include string -include stdexcept" }
-// { dg-do run { target c++2a } }
+// { dg-options "-include string -include stdexcept" }
+// { dg-do run { target c++20 } }
 
 #include <source_location>
 
diff --git a/libstdc++-v3/testsuite/18_support/source_location/consteval.cc b/libstdc++-v3/testsuite/18_support/source_location/consteval.cc
index 92b0313..802054d 100644
--- a/libstdc++-v3/testsuite/18_support/source_location/consteval.cc
+++ b/libstdc++-v3/testsuite/18_support/source_location/consteval.cc
@@ -18,8 +18,7 @@
 // Example from C++ Standard Working Draft N4842, November 2019 Mailing
 // Adapted for testing.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <source_location>
 #include <string_view>
@@ -119,7 +118,7 @@ int main ()
     member_defaulted_sl.member.file_name());
   constexpr std::string_view member_defaulted_sl_fn_name(
     member_defaulted_sl.member.function_name());
-  static_assert(member_defaulted_sl.member.line() == 36);
+  static_assert(member_defaulted_sl.member.line() == 35);
   // closing paren of constructor declaration
   static_assert(member_defaulted_sl.member.column() == 25);
   static_assert(member_defaulted_sl_fn_name.ends_with("s::s(int)"sv));
diff --git a/libstdc++-v3/testsuite/18_support/source_location/version.cc b/libstdc++-v3/testsuite/18_support/source_location/version.cc
index 540bb1a..8cb5902 100644
--- a/libstdc++-v3/testsuite/18_support/source_location/version.cc
+++ b/libstdc++-v3/testsuite/18_support/source_location/version.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do preprocess { target c++2a } }
+// { dg-do preprocess { target c++20 } }
 
 #include <version>
 
diff --git a/libstdc++-v3/testsuite/19_diagnostics/error_category/operators/three_way.cc b/libstdc++-v3/testsuite/19_diagnostics/error_category/operators/three_way.cc
index 6f41ed2..0580017 100644
--- a/libstdc++-v3/testsuite/19_diagnostics/error_category/operators/three_way.cc
+++ b/libstdc++-v3/testsuite/19_diagnostics/error_category/operators/three_way.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <system_error>
 #include <testsuite_error.h>
diff --git a/libstdc++-v3/testsuite/19_diagnostics/error_code/operators/three_way.cc b/libstdc++-v3/testsuite/19_diagnostics/error_code/operators/three_way.cc
index ce659d7..646f219 100644
--- a/libstdc++-v3/testsuite/19_diagnostics/error_code/operators/three_way.cc
+++ b/libstdc++-v3/testsuite/19_diagnostics/error_code/operators/three_way.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <system_error>
 #include <testsuite_error.h>
diff --git a/libstdc++-v3/testsuite/19_diagnostics/error_condition/operators/three_way.cc b/libstdc++-v3/testsuite/19_diagnostics/error_condition/operators/three_way.cc
index 914fbf4..e568748 100644
--- a/libstdc++-v3/testsuite/19_diagnostics/error_condition/operators/three_way.cc
+++ b/libstdc++-v3/testsuite/19_diagnostics/error_condition/operators/three_way.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <system_error>
 #include <testsuite_error.h>
diff --git a/libstdc++-v3/testsuite/19_diagnostics/stacktrace/output.cc b/libstdc++-v3/testsuite/19_diagnostics/stacktrace/output.cc
index 5116413..35389ec 100644
--- a/libstdc++-v3/testsuite/19_diagnostics/stacktrace/output.cc
+++ b/libstdc++-v3/testsuite/19_diagnostics/stacktrace/output.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++23" }
 // { dg-do compile { target c++23 } }
 // { dg-require-effective-target stacktrace }
 
diff --git a/libstdc++-v3/testsuite/26_numerics/adjacent_difference/lwg2055.cc b/libstdc++-v3/testsuite/26_numerics/adjacent_difference/lwg2055.cc
index 870ddaf..4bd2c47 100644
--- a/libstdc++-v3/testsuite/26_numerics/adjacent_difference/lwg2055.cc
+++ b/libstdc++-v3/testsuite/26_numerics/adjacent_difference/lwg2055.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 
 #include <numeric>
 #include <iterator>
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc
index 5cf208a..fb062c2 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countl_zero.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <bit>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc
index 9e9bfcc..f63ec1e 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_one.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <bit>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc
index 044e1ea..f4de8f8 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/countr_zero.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <bit>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc
index f524e1f..53cb1da 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.count/popcount.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <bit>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc
index 25bddf5..7e5ce85 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <bit>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc
index 8064eda..74fc684 100644
--- a/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc
+++ b/libstdc++-v3/testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do compile { target c++2a } }
+// { dg-do compile { target c++20 } }
 
 #include <bit>
 #include <limits>
diff --git a/libstdc++-v3/testsuite/28_regex/iterators/regex_iterator/lwg3719.cc b/libstdc++-v3/testsuite/28_regex/iterators/regex_iterator/lwg3719.cc
index e8c8f79..b110420 100644
--- a/libstdc++-v3/testsuite/28_regex/iterators/regex_iterator/lwg3719.cc
+++ b/libstdc++-v3/testsuite/28_regex/iterators/regex_iterator/lwg3719.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 
 #include <regex>
diff --git a/libstdc++-v3/testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc b/libstdc++-v3/testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc
index 5c36ace..02019db 100644
--- a/libstdc++-v3/testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc
+++ b/libstdc++-v3/testsuite/28_regex/iterators/regex_token_iterator/lwg3719.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 
 #include <regex>
diff --git a/libstdc++-v3/testsuite/28_regex/sub_match/compare_c++20.cc b/libstdc++-v3/testsuite/28_regex/sub_match/compare_c++20.cc
index 0beaec0e..d60ab41 100644
--- a/libstdc++-v3/testsuite/28_regex/sub_match/compare_c++20.cc
+++ b/libstdc++-v3/testsuite/28_regex/sub_match/compare_c++20.cc
@@ -15,8 +15,7 @@
 // with this library; see the file COPYING3.  If not see
 // <http://www.gnu.org/licenses/>.
 
-// { dg-options "-std=gnu++2a" }
-// { dg-do run { target c++2a } }
+// { dg-do run { target c++20 } }
 // { dg-timeout-factor 2 }
 
 #include <regex>
diff --git a/libstdc++-v3/testsuite/experimental/filesystem/iterators/106201.cc b/libstdc++-v3/testsuite/experimental/filesystem/iterators/106201.cc
index 017b72e..425bd33 100644
--- a/libstdc++-v3/testsuite/experimental/filesystem/iterators/106201.cc
+++ b/libstdc++-v3/testsuite/experimental/filesystem/iterators/106201.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do compile { target c++20 } }
 // { dg-require-filesystem-ts "" }
 
diff --git a/libstdc++-v3/testsuite/experimental/scopeguard/exit.cc b/libstdc++-v3/testsuite/experimental/scopeguard/exit.cc
index 60616d1..86e8821 100644
--- a/libstdc++-v3/testsuite/experimental/scopeguard/exit.cc
+++ b/libstdc++-v3/testsuite/experimental/scopeguard/exit.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 
 #include <experimental/scope>
diff --git a/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc b/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc
index fe9d6ee..27a427f 100644
--- a/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc
+++ b/libstdc++-v3/testsuite/experimental/scopeguard/uniqueres.cc
@@ -1,4 +1,3 @@
-// { dg-options "-std=gnu++20" }
 // { dg-do run { target c++20 } }
 
 #include <experimental/scope>