New module 'ilogbf'.

[gnulib.git] / m4 / fmodl.m4

diff --git a/m4/fmodl.m4 b/m4/fmodl.m4
index ff72c8c..93bc007 100644 (file)
--- a/m4/fmodl.m4
+++ b/m4/fmodl.m4
@@ -1,4 +1,4 @@
-# fmodl.m4 serial 3
+# fmodl.m4 serial 4
 dnl Copyright (C) 2011-2012 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -11,6 +11,9 @@ AC_DEFUN([gl_FUNC_FMODL],
   AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
   AC_REQUIRE([gl_FUNC_FMOD])
 
+  dnl Persuade glibc <math.h> to declare fmodl().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
   dnl Test whether fmodl() is declared.
   dnl AIX 5.1 has fmodl() in libc but doesn't declare it in <math.h>, and the
   dnl function produces NaN results for finite values.