Don't provide XXXf128_do_not_use aliases [BZ #31757]

Don't provide __nexttowardf128_do_not_use, nexttowardf128_do_not_use,
finitef128_do_not_use, isinff128_do_not_use and isnanf128_do_not_use.
This fixes BZ #31757.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

sysdeps/ieee754/float128/s_isnanf128.c

@@ -16,7 +16,9 @@ hidden_ver (__isnanf128_impl, __isnanf128)
 #else
 strong_alias (__isnanf128_impl, __isnanf128)
 #endif
+#ifndef isnanl
 _weak_alias (__isnanf128_impl, isnanl)
+#endif
 versioned_symbol (libc, __isnanf128_impl, __isnanf128, GLIBC_2_34);
 #if (SHLIB_COMPAT (libc, FLOAT128_VERSION_M, GLIBC_2_34))
 strong_alias (__isnanf128_impl, __isnanf128_alias)

sysdeps/ieee754/ldbl-128/s_finitel.c

@@ -32,4 +32,6 @@ int __finitel(_Float128 x)
 				-0x7fff000000000000LL)>>63);
 }
 mathx_hidden_def (__finitel)
+#ifndef finitel
 weak_alias (__finitel, finitel)
+#endif

sysdeps/ieee754/ldbl-128/s_isinfl.c

@@ -24,4 +24,6 @@ __isinfl (_Float128 x)
 	return ~(lx >> 63) & (hx >> 62);
 }
 mathx_hidden_def (__isinfl)
+#ifndef isinfl
 weak_alias (__isinfl, isinfl)
+#endif

sysdeps/ieee754/ldbl-128/s_nextafterl.c

@@ -83,5 +83,9 @@ _Float128 __nextafterl(_Float128 x, _Float128 y)
 	return x;
 }
 libm_alias_ldouble (__nextafter, nextafter)
+#ifndef __nexttowardl
 strong_alias (__nextafterl, __nexttowardl)
+#endif
+#ifndef nexttowardl
 weak_alias (__nextafterl, nexttowardl)
+#endif