X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsinf.m4;h=54ed82bee32c11af07f3ecdc840f173fa8d5aac1;hb=46f5f314f34a08c9305758482d7d2fdb0e999d09;hp=dbe84ea005d3f68c71e11e000a97cd74fe703edd;hpb=9723bfe9bb9af8309314ad6230f7661000ba03b1;p=gnulib.git

diff --git a/m4/sinf.m4 b/m4/sinf.m4
index dbe84ea00..54ed82bee 100644
--- a/m4/sinf.m4
+++ b/m4/sinf.m4
@@ -1,5 +1,5 @@
-# sinf.m4 serial 1
-dnl Copyright (C) 2011 Free Software Foundation, Inc.
+# sinf.m4 serial 2
+dnl Copyright (C) 2011-2014 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.
@@ -9,6 +9,9 @@ AC_DEFUN([gl_FUNC_SINF],
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_SIN])
 
+  dnl Persuade glibc <math.h> to declare sinf().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
   dnl Test whether sinf() exists. Assume that sinf(), if it exists, is
   dnl defined in the same library as sin().
   save_LIBS="$LIBS"