-# readline.m4 serial 1
-dnl Copyright (C) 2005 Free Software Foundation, Inc.
+# readline.m4 serial 5
+dnl Copyright (C) 2005, 2006 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.
+dnl Written by Simon Josefsson, with help from Bruno Haible and Oskar
+dnl Liljeblad.
+
AC_DEFUN([gl_FUNC_READLINE],
[
- AC_LIBSOURCES([readline.c, readline.h])
-
dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
AC_REQUIRE([AC_LIB_RPATH])
AC_CACHE_CHECK(for readline, gl_cv_lib_readline, [
gl_cv_lib_readline=no
am_save_LIBS="$LIBS"
- LIBS="$LIBS $LIBREADLINE"
- AC_TRY_LINK([#include <stdio.h>
+ dnl On some systems, -lreadline doesn't link without an additional
+ dnl -lncurses or -ltermcap.
+ dnl Try -lncurses before -ltermcap, because libtermcap is unsecure
+ dnl by design and obsolete since 1994. Try -lcurses last, because
+ dnl libcurses is unusable on some old Unices.
+ for extra_lib in "" ncurses termcap curses; do
+ LIBS="$am_save_LIBS $LIBREADLINE"
+ if test -n "$extra_lib"; then
+ LIBS="$LIBS -l$extra_lib"
+ fi
+ AC_TRY_LINK([#include <stdio.h>
#include <readline/readline.h>],
- [readline((char*)0);],
- gl_cv_lib_readline=yes)
+ [readline((char*)0);],
+ [gl_cv_lib_readline=" -l$extra_lib"])
+ if test "$gl_cv_lib_readline" != no; then
+ break
+ fi
+ done
LIBS="$am_save_LIBS"
])
- if test "$gl_cv_lib_readline" = yes; then
- AC_DEFINE(HAVE_READLINE, 1, [Define if you have the readline() library.])
- fi
- if test "$gl_cv_lib_readline" = yes; then
+
+ if test "$gl_cv_lib_readline" != no; then
+ 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$gl_cv_lib_readline"
+ fi
AC_MSG_CHECKING([how to link with libreadline])
AC_MSG_RESULT([$LIBREADLINE])
else
- dnl If $LIBREADLINE didn't lead to a usable library, we don't need $INCREADLINE
- dnl either.
+ dnl If $LIBREADLINE didn't lead to a usable library, we don't
+ dnl need $INCREADLINE either.
CPPFLAGS="$am_save_CPPFLAGS"
LIBREADLINE=
LTLIBREADLINE=