[gcc(refs/users/aoliva/heads/testme)] [libstdc++] [testsuite] require cmath for c++23 cmath tests

[Alexandre Oliva]

https://gcc.gnu.org/g:bed26758b722c27f22be833546b0ef9a9793dfe2

commit bed26758b722c27f22be833546b0ef9a9793dfe2
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Tue Jun 11 20:25:33 2024 -0300

    [libstdc++] [testsuite] require cmath for c++23 cmath tests
    
    Some c++23 tests fail on targets that don't satisfy dg-require-cmath,
    because referenced math functions don't get declared in std.  Add the
    missing requirement.
    
    
    for  libstdc++-v3/ChangeLog
    
            * testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc:
            Require cmath.
            * testsuite/26_numerics/headers/cmath/functions_std_c++23.cc:
            Likewise.
            * testsuite/26_numerics/headers/cmath/nextafter_std_c++23.cc:
            Likewise.

Diff:
---
 libstdc++-v3/testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc | 1 +
 libstdc++-v3/testsuite/26_numerics/headers/cmath/functions_std_c++23.cc | 1 +
 libstdc++-v3/testsuite/26_numerics/headers/cmath/nextafter_c++23.cc     | 1 +
 3 files changed, 3 insertions(+)

diff --git a/libstdc++-v3/testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc b/libstdc++-v3/testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc
index 0e3d112fe2e8..3c2377fd6987 100644
--- a/libstdc++-v3/testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc
+++ b/libstdc++-v3/testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc
@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do link { target c++23 } }
+// { dg-require-cmath "" }
 
 #include <stdfloat>
 #include <cmath>
diff --git a/libstdc++-v3/testsuite/26_numerics/headers/cmath/functions_std_c++23.cc b/libstdc++-v3/testsuite/26_numerics/headers/cmath/functions_std_c++23.cc
index 000cebf364aa..ea68ac5da755 100644
--- a/libstdc++-v3/testsuite/26_numerics/headers/cmath/functions_std_c++23.cc
+++ b/libstdc++-v3/testsuite/26_numerics/headers/cmath/functions_std_c++23.cc
@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do link { target c++23 } }
+// { dg-require-cmath "" }
 
 #include <stdfloat>
 #include <cmath>
diff --git a/libstdc++-v3/testsuite/26_numerics/headers/cmath/nextafter_c++23.cc b/libstdc++-v3/testsuite/26_numerics/headers/cmath/nextafter_c++23.cc
index 7d7e10bd8aea..91767d22cc3f 100644
--- a/libstdc++-v3/testsuite/26_numerics/headers/cmath/nextafter_c++23.cc
+++ b/libstdc++-v3/testsuite/26_numerics/headers/cmath/nextafter_c++23.cc
@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do run { target c++23 } }
+// { dg-require-cmath "" }
 
 #include <stdfloat>
 #include <cmath>