X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fpread.m4;h=f1425a6b1de25b30e9c2f598f0a041da416714a8;hb=b7b6d3d99a751f99638ed8e14b62c1cf697f0664;hp=c281362df985c272552cf6224ae4047d48494004;hpb=f84e1a91fb3c43ba06567cbaeaf641135170d35a;p=gnulib.git

diff --git a/m4/pread.m4 b/m4/pread.m4
index c281362df..f1425a6b1 100644
--- a/m4/pread.m4
+++ b/m4/pread.m4
@@ -1,5 +1,5 @@
-# pread.m4 serial 1
-dnl Copyright (C) 2009 Free Software Foundation, Inc.
+# pread.m4 serial 2
+dnl Copyright (C) 2009-2010 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.
@@ -7,6 +7,9 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_PREAD],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  dnl Persuade glibc <unistd.h> to declare pread().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
   AC_CHECK_FUNCS_ONCE([pread])
   if test $ac_cv_func_pread = no; then
     HAVE_PREAD=0