[glibc] Declare wcstofN, wcstofNx for C2x

[glibc] Declare wcstofN, wcstofNx for C2x

[Joseph Myers]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9e2ff880f3cbc0b4ec8505ad2ce4a1c92d7f6d56

commit 9e2ff880f3cbc0b4ec8505ad2ce4a1c92d7f6d56
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Tue Mar 14 18:11:27 2023 +0000

    Declare wcstofN, wcstofNx for C2x
    
    WG14 accepted the changes in N3105 to define wcstofN and wcstofNx
    functions for C2x.  Thus enable those for C2x (given also __GLIBC_USE
    (IEC_60559_TYPES_EXT) and support for the relevant _FloatN / _FloatNx
    type) rather than only for __USE_GNU.
    
    Tested for x86_64.

Diff:
---
 wcsmbs/wchar.h | 30 ++++++++++++++++--------------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/wcsmbs/wchar.h b/wcsmbs/wchar.h
index 7ab99ba93b..acc2eb9ddf 100644
--- a/wcsmbs/wchar.h
+++ b/wcsmbs/wchar.h
@@ -386,42 +386,44 @@ extern long double wcstold (const wchar_t *__restrict __nptr,
 			    wchar_t **__restrict __endptr) __THROW;
 #endif /* C99 */
 
+#if __GLIBC_USE (IEC_60559_TYPES_EXT) && __GLIBC_USE (ISOC2X)
 /* Likewise for `_FloatN' and `_FloatNx' when support is enabled.  */
 
-#if __HAVE_FLOAT16 && defined __USE_GNU
+# if __HAVE_FLOAT16
 extern _Float16 wcstof16 (const wchar_t *__restrict __nptr,
 			  wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
 
-#if __HAVE_FLOAT32 && defined __USE_GNU
+# if __HAVE_FLOAT32
 extern _Float32 wcstof32 (const wchar_t *__restrict __nptr,
 			  wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
 
-#if __HAVE_FLOAT64 && defined __USE_GNU
+# if __HAVE_FLOAT64
 extern _Float64 wcstof64 (const wchar_t *__restrict __nptr,
 			  wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
 
-#if __HAVE_FLOAT128 && defined __USE_GNU
+# if __HAVE_FLOAT128
 extern _Float128 wcstof128 (const wchar_t *__restrict __nptr,
 			    wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
 
-#if __HAVE_FLOAT32X && defined __USE_GNU
+# if __HAVE_FLOAT32X
 extern _Float32x wcstof32x (const wchar_t *__restrict __nptr,
 			    wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
 
-#if __HAVE_FLOAT64X && defined __USE_GNU
+# if __HAVE_FLOAT64X
 extern _Float64x wcstof64x (const wchar_t *__restrict __nptr,
 			    wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
 
-#if __HAVE_FLOAT128X && defined __USE_GNU
+# if __HAVE_FLOAT128X
 extern _Float128x wcstof128x (const wchar_t *__restrict __nptr,
 			      wchar_t **__restrict __endptr) __THROW;
-#endif
+# endif
+#endif /* __GLIBC_USE (IEC_60559_TYPES_EXT) && __GLIBC_USE (ISOC2X) */
 
 
 /* Convert initial portion of wide string NPTR to `long int'