Refer to C23 in place of C2X in glibc

WG14 decided to use the name C23 as the informal name of the next
revision of the C standard (notwithstanding the publication date in
2024).  Update references to C2X in glibc to use the C23 name.

This is intended to update everything *except* where it involves
renaming files (the changes involving renaming tests are intended to
be done separately).  In the case of the _ISOC2X_SOURCE feature test
macro - the only user-visible interface involved - support for that
macro is kept for backwards compatibility, while adding
_ISOC23_SOURCE.

Tested for x86_64.

1 files changed, 7 insertions, 7 deletions

diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index 4916ffb8b6..f46d3000b2 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -109,7 +109,7 @@ __MATHCALL_VEC (log10,, (_Mdouble_ __x));
 /* Break VALUE into integral and fractional parts.  */
 __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) __nonnull ((2));
 
-#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C2X)
+#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C23)
 /* Compute exponent to base ten.  */
 __MATHCALL_VEC (exp10,, (_Mdouble_ __x));
 #endif
@@ -264,7 +264,7 @@ __MATHCALL (nextafter,, (_Mdouble_ __x, _Mdouble_ __y));
 __MATHCALL (nexttoward,, (_Mdouble_ __x, long double __y));
 # endif
 
-# if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) || __MATH_DECLARING_FLOATN
+# if __GLIBC_USE (IEC_60559_BFP_EXT_C23) || __MATH_DECLARING_FLOATN
 /* Return X - epsilon.  */
 __MATHCALL (nextdown,, (_Mdouble_ __x));
 /* Return X + epsilon.  */
@@ -283,7 +283,7 @@ __MATHCALL (scalbn,, (_Mdouble_ __x, int __n));
 __MATHDECL (int,ilogb,, (_Mdouble_ __x));
 #endif
 
-#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) || __MATH_DECLARING_FLOATN
+#if __GLIBC_USE (IEC_60559_BFP_EXT_C23) || __MATH_DECLARING_FLOATN
 /* Like ilogb, but returning long int.  */
 __MATHDECL (long int, llogb,, (_Mdouble_ __x));
 #endif
@@ -328,7 +328,7 @@ __MATHDECL (long long int,llround,, (_Mdouble_ __x));
 /* Return positive difference between X and Y.  */
 __MATHCALL (fdim,, (_Mdouble_ __x, _Mdouble_ __y));
 
-# if !__MATH_DECLARING_FLOATN || defined __USE_GNU || !__GLIBC_USE (ISOC2X)
+# if !__MATH_DECLARING_FLOATN || defined __USE_GNU || !__GLIBC_USE (ISOC23)
 /* Return maximum numeric value from X and Y.  */
 __MATHCALLX (fmax,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));
 
@@ -340,7 +340,7 @@ __MATHCALLX (fmin,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));
 __MATHCALL (fma,, (_Mdouble_ __x, _Mdouble_ __y, _Mdouble_ __z));
 #endif /* Use ISO C99.  */
 
-#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X) || __MATH_DECLARING_FLOATN
+#if __GLIBC_USE (IEC_60559_BFP_EXT_C23) || __MATH_DECLARING_FLOATN
 /* Round X to nearest integer value, rounding halfway cases to even.  */
 __MATHCALLX (roundeven,, (_Mdouble_ __x), (__const__));
 
@@ -372,7 +372,7 @@ __MATHDECL_1 (int, canonicalize,, (_Mdouble_ *__cx, const _Mdouble_ *__x));
 
 #if (__GLIBC_USE (IEC_60559_BFP_EXT)				\
      || (__MATH_DECLARING_FLOATN				\
-	 && (defined __USE_GNU || !__GLIBC_USE (ISOC2X))))
+	 && (defined __USE_GNU || !__GLIBC_USE (ISOC23))))
 /* Return value with maximum magnitude.  */
 __MATHCALLX (fmaxmag,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));
 
@@ -380,7 +380,7 @@ __MATHCALLX (fmaxmag,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));
 __MATHCALLX (fminmag,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));
 #endif
 
-#if __GLIBC_USE (ISOC2X)
+#if __GLIBC_USE (ISOC23)
 /* Return maximum value from X and Y.  */
 __MATHCALLX (fmaximum,, (_Mdouble_ __x, _Mdouble_ __y), (__const__));