canonicalize, canonicalize-lgpl: update module dependencies

[gnulib.git] / m4 / getline.m4

diff --git a/m4/getline.m4 b/m4/getline.m4
index 2b5aaab..4897bc3 100644 (file)
--- a/m4/getline.m4
+++ b/m4/getline.m4
@@ -1,32 +1,35 @@
-# getline.m4 serial 11
+# getline.m4 serial 20
 
-dnl Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 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([AM_FUNC_GETLINE],
+AC_DEFUN([gl_FUNC_GETLINE],
 [
-  dnl Persuade glibc <stdio.h> to declare getline() and getdelim().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
 
-  am_getline_needs_run_time_check=no
-  AC_CHECK_FUNC(getline,
+  dnl Persuade glibc <stdio.h> to declare getline().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_DECLS_ONCE([getline])
+
+  gl_getline_needs_run_time_check=no
+  AC_CHECK_FUNC([getline],
                dnl Found it in some library.  Verify that it works.
-               am_getline_needs_run_time_check=yes,
+               gl_getline_needs_run_time_check=yes,
                am_cv_func_working_getline=no)
-  if test $am_getline_needs_run_time_check = yes; then
-    AC_CACHE_CHECK([for working getline function], am_cv_func_working_getline,
+  if test $gl_getline_needs_run_time_check = yes; then
+    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([
+    AC_RUN_IFELSE([AC_LANG_SOURCE([[
 #    include <stdio.h>
 #    include <stdlib.h>
 #    include <string.h>
@@ -41,34 +44,37 @@ AC_DEFUN([AM_FUNC_GETLINE],
       len = getline (&line, &siz, in);
       exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
     }
-    ], am_cv_func_working_getline=yes dnl The library version works.
-    , am_cv_func_working_getline=no dnl The library version does NOT work.
-    , am_cv_func_working_getline=no dnl We're cross compiling.
+    ]])], [am_cv_func_working_getline=yes] dnl The library version works.
+    , [am_cv_func_working_getline=no] dnl The library version does NOT work.
+    , dnl We're cross compiling. Assume it works on glibc2 systems.
+      [AC_EGREP_CPP([Lucky GNU user],
+         [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2)
+  Lucky GNU user
+ #endif
+#endif
+         ],
+         [am_cv_func_working_getline=yes],
+         [am_cv_func_working_getline=no])]
     )])
   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)
+  if test $ac_cv_have_decl_getline = no; then
+    HAVE_DECL_GETLINE=0
+  fi
 
-    # Avoid multiple inclusions of getndelim2.o into LIBOBJS.
-    # This hack won't be needed after gnulib requires Autoconf 2.58 or later.
-    case " $LIB@&t@OBJS " in
-    *" getndelim2.$ac_objext "* ) ;;
-    *) AC_LIBOBJ(getndelim2);;
-    esac
+  if test $am_cv_func_working_getline = no; then
+    REPLACE_GETLINE=1
+    AC_LIBOBJ([getline])
 
     gl_PREREQ_GETLINE
-    gl_PREREQ_GETNDELIM2
   fi
 ])
 
 # Prerequisites of lib/getline.c.
 AC_DEFUN([gl_PREREQ_GETLINE],
 [
-  AC_CHECK_FUNCS(getdelim)
+  gl_FUNC_GETDELIM
 ])