[PATCH 1/3] libstdc++: Fix typos in tests using macros for std::float128_t support

[Jonathan Wakely]

These tests check `_GLIBCXX_DOUBLE_IS_IEEE_BINARY128` but that's never
defined, it should be "LDOUBLE" not "DOUBLE".

libstdc++-v3/ChangeLog:

        * testsuite/26_numerics/complex/ext_c++23.cc: Fix typo in macro.
        * testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc:
        Likewise.
        * testsuite/26_numerics/headers/cmath/functions_std_c++23.cc:
        Likewise.
        * testsuite/26_numerics/headers/cmath/nextafter_c++23.cc:
        Likewise.
---
This first patch is an obvious fix for a typo, but tests still pass
after fixing it, which is reassuring!

I'll push it shortly.

Tested powerpc64le-linux.

 libstdc++-v3/testsuite/26_numerics/complex/ext_c++23.cc         | 2 +-
 .../testsuite/26_numerics/headers/cmath/constexpr_std_c++23.cc  | 2 +-
 .../testsuite/26_numerics/headers/cmath/functions_std_c++23.cc  | 2 +-
 .../testsuite/26_numerics/headers/cmath/nextafter_c++23.cc      | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/libstdc++-v3/testsuite/26_numerics/complex/ext_c++23.cc 
b/libstdc++-v3/testsuite/26_numerics/complex/ext_c++23.cc
index 0fc3d6f1a66..5f4ff06448e 100644
--- a/libstdc++-v3/testsuite/26_numerics/complex/ext_c++23.cc
+++ b/libstdc++-v3/testsuite/26_numerics/complex/ext_c++23.cc
@@ -70,7 +70,7 @@ main()
   }
 #endif
 #if defined(__STDCPP_FLOAT128_T__) \
-    && (defined(_GLIBCXX_DOUBLE_IS_IEEE_BINARY128) \
+    && (defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128) \
        || defined(_GLIBCXX_HAVE_FLOAT128_MATH))
   {
     std::float128_t p[2] = {};
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 3c2377fd698..983027ff654 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
@@ -119,7 +119,7 @@ main()
   test_functions<std::float64_t>();
 #endif
 #if defined(__STDCPP_FLOAT128_T__) \
-    && (defined(_GLIBCXX_DOUBLE_IS_IEEE_BINARY128) \
+    && (defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128) \
        || defined(_GLIBCXX_HAVE_FLOAT128_MATH))
   test_functions<std::float128_t>();
 #endif
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 ea68ac5da75..bf07493ecd4 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
@@ -131,7 +131,7 @@ main()
   }
 #endif
 #if defined(__STDCPP_FLOAT128_T__) \
-    && (defined(_GLIBCXX_DOUBLE_IS_IEEE_BINARY128) \
+    && (defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128) \
        || defined(_GLIBCXX_HAVE_FLOAT128_MATH))
   {
     std::float128_t p[128] = {};
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 91767d22cc3..2d0f8017f4a 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
@@ -117,7 +117,7 @@ main ()
   test <std::float64_t>();
 #endif
 #if defined(__STDCPP_FLOAT128_T__) \
-    && (defined(_GLIBCXX_DOUBLE_IS_IEEE_BINARY128) \
+    && (defined(_GLIBCXX_LDOUBLE_IS_IEEE_BINARY128) \
        || defined(_GLIBCXX_HAVE_FLOAT128_MATH))
   test <std::float128_t>();
 #endif
-- 
2.47.0