Move __isnanl_pseudo to its own file in sysdeps/x86/isnanl-pseudo.c so
that it only links into libc.so.  This way it is only available to
functions in libc and should not affect libm.

diff --git a/include/math.h b/include/math.h
index 4eddc81be0dccad9..c42c8101dd8ebc88 100644
--- a/include/math.h
+++ b/include/math.h
@@ -7,8 +7,7 @@
 extern int __matherr (struct exception *__exc);
 
 # if IS_IN (libc)
-extern int __isnanl_pseudo (long double);
-hidden_proto (__isnanl_pseudo)
+extern int __isnanl_pseudo (long double) attribute_hidden;
 #endif
 
 # if IS_IN (libc) || IS_IN (libm)
diff --git a/sysdeps/i386/fpu/s_isnanl.c b/sysdeps/i386/fpu/s_isnanl.c
index dc83d7a85fb3318b..816396d8fbc79dde 100644
--- a/sysdeps/i386/fpu/s_isnanl.c
+++ b/sysdeps/i386/fpu/s_isnanl.c
@@ -41,23 +41,3 @@ int __isnanl(long double x)
 }
 hidden_def (__isnanl)
 weak_alias (__isnanl, isnanl)
-
-#if IS_IN (libc)
-/* Exact backport from glibc-2.33, used only in printf_fp.c.  */
-int __isnanl_pseudo (long double x)
-{
-	int32_t se,hx,lx,pn;
-	GET_LDOUBLE_WORDS(se,hx,lx,x);
-	se = (se & 0x7fff) << 1;
-	/* Detect pseudo-normal numbers, i.e. exponent is non-zero and the top
-	   bit of the significand is not set.   */
-	pn = (uint32_t)((~hx & 0x80000000) & (se|(-se)))>>31;
-	/* Clear the significand bit when computing mantissa.  */
-	lx |= hx & 0x7fffffff;
-	se |= (uint32_t)(lx|(-lx))>>31;
-	se = 0xfffe - se;
-
-	return (int)(((uint32_t)(se)) >> 16) | pn;
-}
-hidden_def (__isnanl_pseudo)
-#endif
diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
index f1da941dbbadadb3..d2f7b05db6ff6f72 100644
--- a/sysdeps/x86/Makefile
+++ b/sysdeps/x86/Makefile
@@ -22,3 +22,7 @@ endif
 ifeq ($(subdir),math)
 tests += tst-ldbl-nonnormal-printf
 endif # $(subdir) == math
+
+ifeq ($(subdir),stdio-common)
+sysdep_routines += isnanl-pseudo
+endif
diff --git a/sysdeps/x86/isnanl-pseudo.c b/sysdeps/x86/isnanl-pseudo.c
new file mode 100644
index 0000000000000000..95aba4672ba51a16
--- /dev/null
+++ b/sysdeps/x86/isnanl-pseudo.c
@@ -0,0 +1,45 @@
+/* s_isnanl.c -- long double version for i387 of s_isnan.c.
+ * Conversion to long double by Ulrich Drepper,
+ * Cygnus Support, drepper@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice
+ * is preserved.
+ * ====================================================
+ */
+
+#if defined(LIBM_SCCS) && !defined(lint)
+static char rcsid[] = "$NetBSD: $";
+#endif
+
+/*
+ * isnanl(x) returns 1 is x is nan, else 0;
+ * no branching!
+ */
+
+#include <math.h>
+#include <math_private.h>
+
+int
+attribute_hidden
+__isnanl_pseudo(long double x)
+{
+	int32_t se,hx,lx,pn;
+	GET_LDOUBLE_WORDS(se,hx,lx,x);
+	se = (se & 0x7fff) << 1;
+	/* Detect pseudo-normal numbers, i.e. exponent is non-zero and the top
+	   bit of the significand is not set.   */
+	pn = (uint32_t)((~hx & 0x80000000) & (se|(-se)))>>31;
+	/* Clear the significand bit when computing mantissa.  */
+	lx |= hx & 0x7fffffff;
+	se |= (uint32_t)(lx|(-lx))>>31;
+	se = 0xfffe - se;
+
+	return (int)(((uint32_t)(se)) >> 16) | pn;
+}