getcwd: on Solaris, work better if ancestors are inaccessible

[gnulib.git] / m4 / readline.m4

diff --git a/m4/readline.m4 b/m4/readline.m4
index 4c82a7f..27f8162 100644 (file)
--- a/m4/readline.m4
+++ b/m4/readline.m4
@@ -1,5 +1,5 @@
-# readline.m4 serial 5
-dnl Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+# readline.m4 serial 7
+dnl Copyright (C) 2005, 2006, 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.
@@ -19,12 +19,12 @@ AC_DEFUN([gl_FUNC_READLINE],
 
   dnl Add $INCREADLINE to CPPFLAGS before performing the following checks,
   dnl because if the user has installed libreadline and not disabled its use
-  dnl via --without-libreadline-prefix, he wants to use it. The AC_TRY_LINK
+  dnl via --without-libreadline-prefix, he wants to use it. The AC_LINK_IFELSE
   dnl will then succeed.
   am_save_CPPFLAGS="$CPPFLAGS"
   AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCREADLINE])
 
-  AC_CACHE_CHECK(for readline, gl_cv_lib_readline, [
+  AC_CACHE_CHECK([for readline], [gl_cv_lib_readline], [
     gl_cv_lib_readline=no
     am_save_LIBS="$LIBS"
     dnl On some systems, -lreadline doesn't link without an additional
@@ -37,19 +37,19 @@ AC_DEFUN([gl_FUNC_READLINE],
       if test -n "$extra_lib"; then
         LIBS="$LIBS -l$extra_lib"
       fi
-      AC_TRY_LINK([#include <stdio.h>
-#include <readline/readline.h>],
-        [readline((char*)0);],
+      AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>
+#include <readline/readline.h>]],
+          [[readline((char*)0);]])],
         [gl_cv_lib_readline=" -l$extra_lib"])
       if test "$gl_cv_lib_readline" != no; then
-       break
+        break
       fi
     done
     LIBS="$am_save_LIBS"
   ])
 
   if test "$gl_cv_lib_readline" != no; then
-    AC_DEFINE(HAVE_READLINE, 1, [Define if you have the readline library.])
+    AC_DEFINE([HAVE_READLINE], [1], [Define if you have the readline library.])
     if test "$gl_cv_lib_readline" != " -l"; then
       LIBREADLINE="$LIBREADLINE$gl_cv_lib_readline"
       LTLIBREADLINE="$LTLIBREADLINE$gl_cv_lib_readline"
@@ -63,13 +63,13 @@ AC_DEFUN([gl_FUNC_READLINE],
     LIBREADLINE=
     LTLIBREADLINE=
   fi
-  AC_SUBST(LIBREADLINE)
-  AC_SUBST(LTLIBREADLINE)
+  AC_SUBST([LIBREADLINE])
+  AC_SUBST([LTLIBREADLINE])
 
-  AC_CHECK_HEADERS(readline/readline.h)
+  AC_CHECK_HEADERS([readline/readline.h])
 
   if test $gl_cv_lib_readline = no; then
-    AC_LIBOBJ(readline)
+    AC_LIBOBJ([readline])
     gl_PREREQ_READLINE
   fi
 ])