Support strtof64x, wcstof64x aliases.

This patch adds support for defining strtof64x, strtof64x_l, wcstof64
and wcstof64x_l function aliases when _Float64x is supported.

Tested for x86_64, including in conjunction with _Float64x support
patches, and also tested build for other configurations (in
conjunction with _Float64x support patches) with build-many-glibcs.py
to cover the various different files needing updating to define these
aliases.

	* stdlib/strtold.c [__HAVE_FLOAT64X_LONG_DOUBLE] (strtof64x):
	Define and later undefine as macro.  Define as weak alias if
	[!USE_WIDE_CHAR].
	[__HAVE_FLOAT64X_LONG_DOUBLE] (wcstof64x): Define and later
	undefine as macro.  Define as weak alias if [USE_WIDE_CHAR].
	* sysdeps/ieee754/float128/strtof128.c: Include <bits/floatn.h>.
	[__HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE] (strtof64x):
	Define and later undefine as macro.  Define as weak alias if
	[!USE_WIDE_CHAR].
	[__HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE] (wcstof64x):
	Define and later undefine as macro.  Define as weak alias if
	[USE_WIDE_CHAR].
	* sysdeps/ieee754/float128/strtof128_l.c
	[__HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE] (strtof64x_l):
	Define and later undefine as macro.  Define as weak alias if
	[!USE_WIDE_CHAR].
	[__HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE] (wcstof64x_l):
	Define and later undefine as macro.  Define as weak alias if
	[USE_WIDE_CHAR].
	* sysdeps/ieee754/ldbl-128/strtold_l.c
	[__HAVE_FLOAT64X_LONG_DOUBLE] (strtof64x_l): Define and later
	undefine as macro.  Define as weak alias if [!USE_WIDE_CHAR].
	[__HAVE_FLOAT64X_LONG_DOUBLE] (wcstof64x_l): Define and later
	undefine as macro.  Define as weak alias if [USE_WIDE_CHAR].
	* sysdeps/ieee754/ldbl-64-128/strtold_l.c
	[__HAVE_FLOAT64X_LONG_DOUBLE] (strtof64x_l): Define and later
	undefine as macro.  Define as weak alias if [!USE_WIDE_CHAR].
	[__HAVE_FLOAT64X_LONG_DOUBLE] (wcstof64x_l): Define and later
	undefine as macro.  Define as weak alias if [USE_WIDE_CHAR].
	* sysdeps/ieee754/ldbl-96/strtold_l.c
	[__HAVE_FLOAT64X_LONG_DOUBLE] (strtof64x_l): Define and later
	undefine as macro.  Define as weak alias if [!USE_WIDE_CHAR].
	[__HAVE_FLOAT64X_LONG_DOUBLE] (wcstof64x_l): Define and later
	undefine as macro.  Define as weak alias if [USE_WIDE_CHAR].

2 files changed, 32 insertions, 0 deletions

diff --git a/sysdeps/ieee754/float128/strtof128.c b/sysdeps/ieee754/float128/strtof128.c
index 63cc80d58d..e82bff6b62 100644
--- a/sysdeps/ieee754/float128/strtof128.c
+++ b/sysdeps/ieee754/float128/strtof128.c
@@ -19,6 +19,13 @@
 /* The actual implementation for all floating point sizes is in strtod.c.
    These macros tell it to produce the `_Float128' version, `strtof128'.  */
 
+#include <bits/floatn.h>
+
+#if __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
+# define strtof64x __hide_strtof64x
+# define wcstof64x __hide_wcstof64x
+#endif
+
 #define FLOAT		_Float128
 #define FLT		FLT128
 #ifdef USE_WIDE_CHAR
@@ -32,3 +39,13 @@
 #include <float128_private.h>
 
 #include <stdlib/strtod.c>
+
+#if __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
+# undef strtof64x
+# undef wcstof64x
+# ifdef USE_WIDE_CHAR
+weak_alias (wcstof128, wcstof64x)
+# else
+weak_alias (strtof128, strtof64x)
+# endif
+#endif
diff --git a/sysdeps/ieee754/float128/strtof128_l.c b/sysdeps/ieee754/float128/strtof128_l.c
index a541d60ef3..833a1360d0 100644
--- a/sysdeps/ieee754/float128/strtof128_l.c
+++ b/sysdeps/ieee754/float128/strtof128_l.c
@@ -21,6 +21,11 @@
 /* Bring in potential typedef for _Float128 early for declaration below.  */
 #include <bits/floatn.h>
 
+#if __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
+# define strtof64x_l __hide_strtof64x_l
+# define wcstof64x_l __hide_wcstof64x_l
+#endif
+
 extern _Float128 ____strtof128_l_internal (const char *, char **,
 					   int, locale_t);
 
@@ -41,3 +46,13 @@ extern _Float128 ____strtof128_l_internal (const char *, char **,
 #include <float128_private.h>
 
 #include <stdlib/strtod_l.c>
+
+#if __HAVE_FLOAT64X && !__HAVE_FLOAT64X_LONG_DOUBLE
+# undef strtof64x_l
+# undef wcstof64x_l
+# ifdef USE_WIDE_CHAR
+weak_alias (wcstof128_l, wcstof64x_l)
+# else
+weak_alias (strtof128_l, strtof64x_l)
+# endif
+#endif