update-copyright: generalize comment handling

[gnulib.git] / m4 / getline.m4

diff --git a/m4/getline.m4 b/m4/getline.m4
index f49c50e..9993345 100644 (file)
--- a/m4/getline.m4
+++ b/m4/getline.m4
@@ -1,34 +1,33 @@
-# getline.m4 serial 14
+# getline.m4 serial 19
 
-dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006 Free Software
-dnl Foundation, Inc.
+dnl Copyright (C) 1998-2003, 2005-2007, 2009 Free Software Foundation, Inc.
 dnl
 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_PREREQ(2.52)
+AC_PREREQ([2.59])
 
 dnl See if there's a working, system-supplied version of the getline function.
-dnl We can't just do AC_REPLACE_FUNCS(getline) because some systems
+dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
 dnl have a function by that name in -linet that doesn't have anything
 dnl to do with the function we need.
 AC_DEFUN([gl_FUNC_GETLINE],
 [
-  AC_LIBSOURCES([getline.c, getline.h])
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
 
   dnl Persuade glibc <stdio.h> to declare getline().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
-  AC_CHECK_DECLS([getline])
+  AC_CHECK_DECLS_ONCE([getline])
 
   gl_getline_needs_run_time_check=no
-  AC_CHECK_FUNC(getline,
+  AC_CHECK_FUNC([getline],
                dnl Found it in some library.  Verify that it works.
                gl_getline_needs_run_time_check=yes,
                am_cv_func_working_getline=no)
   if test $gl_getline_needs_run_time_check = yes; then
-    AC_CACHE_CHECK([for working getline function], am_cv_func_working_getline,
+    AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
     [echo fooN |tr -d '\012'|tr N '\012' > conftest.data
     AC_TRY_RUN([
 #    include <stdio.h>
@@ -62,13 +61,13 @@ AC_DEFUN([gl_FUNC_GETLINE],
     )])
   fi
 
+  if test $ac_cv_have_decl_getline = no; then
+    HAVE_DECL_GETLINE=0
+  fi
+
   if test $am_cv_func_working_getline = no; then
-    dnl We must choose a different name for our function, since on ELF systems
-    dnl a broken getline() in libc.so would override our getline() in
-    dnl libgettextlib.so.
-    AC_DEFINE([getline], [gnu_getline],
-      [Define to a replacement function name for getline().])
-    AC_LIBOBJ(getline)
+    REPLACE_GETLINE=1
+    AC_LIBOBJ([getline])
 
     gl_PREREQ_GETLINE
   fi