--- /dev/null
+# pwrite.m4 serial 1
+dnl Copyright (C) 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.
+
+AC_DEFUN([gl_FUNC_PWRITE],
+[
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+
+ dnl Persuade glibc <unistd.h> to declare pwrite().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_FUNCS_ONCE([pwrite])
+ if test $ac_cv_func_pwrite = no; then
+ HAVE_PWRITE=0
+ AC_LIBOBJ([pwrite])
+ fi
+])