2 dnl Copyright (C) 2005 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl Written by Simon Josefsson, with help from Bruno Haible and Oskar
10 AC_DEFUN([gl_FUNC_READLINE],
12 AC_LIBSOURCES([readline.c, readline.h])
14 dnl Prerequisites of AC_LIB_LINKFLAGS_BODY.
15 AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
16 AC_REQUIRE([AC_LIB_RPATH])
18 dnl Search for libreadline and define LIBREADLINE, LTLIBREADLINE and
19 dnl INCREADLINE accordingly.
20 AC_LIB_LINKFLAGS_BODY([readline])
22 dnl Add $INCREADLINE to CPPFLAGS before performing the following checks,
23 dnl because if the user has installed libreadline and not disabled its use
24 dnl via --without-libreadline-prefix, he wants to use it. The AC_TRY_LINK
25 dnl will then succeed.
26 am_save_CPPFLAGS="$CPPFLAGS"
27 AC_LIB_APPENDTOVAR([CPPFLAGS], [$INCREADLINE])
29 AC_CACHE_CHECK(for readline, gl_cv_lib_readline, [
32 for extra_lib in "" termcap curses ncurses; do
33 LIBS="$am_save_LIBS $LIBREADLINE"
34 if test -n "$extra_lib"; then
35 LIBS="$LIBS -l$extra_lib"
37 AC_TRY_LINK([#include <stdio.h>
38 #include <readline/readline.h>],
39 [readline((char*)0);],
40 gl_cv_lib_readline=yes)
41 if test "$gl_cv_lib_readline" = yes; then
42 if test -n "$extra_lib"; then
43 LIBREADLINE="$LIBREADLINE -l$extra_lib"
44 LTLIBREADLINE="$LTLIBREADLINE -l$extra_lib"
52 if test "$gl_cv_lib_readline" = yes; then
53 AC_DEFINE(HAVE_READLINE, 1, [Define if you have the readline library.])
56 if test "$gl_cv_lib_readline" = yes; then
57 AC_MSG_CHECKING([how to link with libreadline])
58 AC_MSG_RESULT([$LIBREADLINE])
60 dnl If $LIBREADLINE didn't lead to a usable library, we don't
61 dnl need $INCREADLINE either.
62 CPPFLAGS="$am_save_CPPFLAGS"
67 AC_SUBST(LTLIBREADLINE)
69 AC_CHECK_HEADERS(readline/readline.h)
71 if test $gl_cv_lib_readline = no; then
77 # Prerequisites of lib/readline.c.
78 AC_DEFUN([gl_PREREQ_READLINE], [