new file mode 100644
--- /dev/null
+++ b/m4/printf-frexpl.m4
@@ -0,0 +1,43 @@
+# printf-frexpl.m4 serial 1
+dnl Copyright (C) 2007 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Check how to define printf_frexpl() without linking with libm.
+
+AC_DEFUN([gl_FUNC_PRINTF_FREXPL],
+[
+  AC_REQUIRE([gt_TYPE_LONGDOUBLE])
+  if test $gt_cv_c_long_double = yes; then
+    AC_CACHE_CHECK([whether frexpl can be used without linking with libm],
+      [gl_cv_func_frexpl_no_libm],
+      [
+        AC_TRY_LINK([#include <math.h>
+                     long double x;
+                     int y;],
+                    [return frexpl (x, &y) < 1;],
+          [gl_cv_func_frexpl_no_libm=yes],
+          [gl_cv_func_frexpl_no_libm=no])
+      ])
+    if test $gl_cv_func_frexpl_no_libm = yes; then
+      AC_DEFINE([HAVE_FREXPL_IN_LIBC], 1,
+        [Define if the frexpl function is available in libc.])
+    fi
+
+    AC_CACHE_CHECK([whether ldexpl can be used without linking with libm],
+      [gl_cv_func_ldexpl_no_libm],
+      [
+        AC_TRY_LINK([#include <math.h>
+                     long double x;
+                     int y;],
+                    [return ldexpl (x, y) < 1;],
+          [gl_cv_func_ldexpl_no_libm=yes],
+          [gl_cv_func_ldexpl_no_libm=no])
+      ])
+    if test $gl_cv_func_ldexpl_no_libm = yes; then
+      AC_DEFINE([HAVE_LDEXPL_IN_LIBC], 1,
+        [Define if the ldexpl function is available in libc.])
+    fi
+  fi
+])