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#
# SYNOPSIS
#
# PANDORA_HAVE_LIBREADLINE
#
# DESCRIPTION
#
# Searches for a readline compatible library. If found, defines
# `HAVE_LIBREADLINE'. If the found library has the `add_history'
# function, sets also `HAVE_READLINE_HISTORY'. Also checks for the
# locations of the necessary include files and sets `HAVE_READLINE_H'
# or `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or
# 'HAVE_HISTORY_H' if the corresponding include files exists.
#
# The libraries that may be readline compatible are `libedit',
# `libeditline' and `libreadline'. Sometimes we need to link a
# termcap library for readline to work, this macro tests these cases
# too by trying to link with `libtermcap', `libcurses' or
# `libncurses' before giving up.
#
# Here is an example of how to use the information provided by this
# macro to perform the necessary includes or declarations in a C
# file:
#
# #ifdef HAVE_LIBREADLINE
# # if defined(HAVE_READLINE_READLINE_H)
# # include <readline/readline.h>
# # elif defined(HAVE_READLINE_H)
# # include <readline.h>
# # else /* !defined(HAVE_READLINE_H) */
# extern char *readline ();
# # endif /* !defined(HAVE_READLINE_H) */
# char *cmdline = NULL;
# #else /* !defined(HAVE_READLINE_READLINE_H) */
# /* no readline */
# #endif /* HAVE_LIBREADLINE */
#
# #ifdef HAVE_READLINE_HISTORY
# # if defined(HAVE_READLINE_HISTORY_H)
# # include <readline/history.h>
# # elif defined(HAVE_HISTORY_H)
# # include <history.h>
# # else /* !defined(HAVE_HISTORY_H) */
# extern void add_history ();
# extern int write_history ();
# extern int read_history ();
# # endif /* defined(HAVE_READLINE_HISTORY_H) */
# /* no history */
# #endif /* HAVE_READLINE_HISTORY */
#
# LAST MODIFICATION
#
# 2009-11-17
#
# Based on VL_LIB_READLINE from Ville Laurikari
#
# COPYLEFT
#
# Copyright (C) 2009 Monty Taylor
# Copyright (C) 2002 Ville Laurikari <vl@iki.fi>
#
# Copying and distribution of this file, with or without
# modification, are permitted in any medium without royalty provided
# the copyright notice and this notice are preserved.
AC_DEFUN([PANDORA_CHECK_TIOCGWINSZ],[
AC_CACHE_CHECK([for TIOCGWINSZ in sys/ioctl.h],
[pandora_cv_tiocgwinsz_in_ioctl],[
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/ioctl.h>
]],[[
int x= TIOCGWINSZ;
]])
],[
pandora_cv_tiocgwinsz_in_ioctl=yes
],[
pandora_cv_tiocgwinsz_in_ioctl=no
])
])
AS_IF([test "$pandora_cv_tiocgwinsz_in_ioctl" = "yes"],[
AC_DEFINE([GWINSZ_IN_SYS_IOCTL], [1],
[READLINE: your system defines TIOCGWINSZ in sys/ioctl.h.])
])
])
AC_DEFUN([PANDORA_CHECK_RL_COMPENTRY], [
AC_CACHE_CHECK([defined rl_compentry_func_t], [pandora_cv_rl_compentry],[
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include "stdio.h"
#include "readline/readline.h"
]],[[
rl_compentry_func_t *func2= (rl_compentry_func_t*)0;
]])
],[
pandora_cv_rl_compentry=yes
],[
pandora_cv_rl_compentry=no
])
])
AS_IF([test "$pandora_cv_rl_compentry" = "yes"],[
AC_DEFINE([HAVE_RL_COMPENTRY], [1],
[Does system provide rl_compentry_func_t])
])
save_CXXFLAGS="${CXXFLAGS}"
CXXFLAGS="${AM_CXXFLAGS} ${CXXFLAGS}"
AC_LANG_PUSH(C++)
AC_CACHE_CHECK([rl_compentry_func_t works], [pandora_cv_rl_compentry_works],[
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include "stdio.h"
#include "readline/readline.h"
]],[[
rl_completion_entry_function= (rl_compentry_func_t*)NULL;
]])
],[
pandora_cv_rl_compentry_works=yes
],[
pandora_cv_rl_compentry_works=no
])
])
AS_IF([test "$pandora_cv_rl_compentry_works" = "yes"],[
AC_DEFINE([HAVE_WORKING_RL_COMPENTRY], [1],
[Does system provide an rl_compentry_func_t that is usable])
])
CXXFLAGS="${save_CXXFLAGS}"
AC_LANG_POP()
])
AC_DEFUN([PANDORA_CHECK_RL_COMPLETION_FUNC], [
AC_CACHE_CHECK([defined rl_completion_func_t], [pandora_cv_rl_completion],[
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include "stdio.h"
#include "readline/readline.h"
]],[[
rl_completion_func_t *func1= (rl_completion_func_t*)0;
]])
],[
pandora_cv_rl_completion=yes
],[
pandora_cv_rl_completion=no
])
])
AS_IF([test "$pandora_cv_rl_completion" = "yes"],[
AC_DEFINE([HAVE_RL_COMPLETION], [1],
[Does system provide rl_completion_func_t])
])
])
AC_DEFUN([_PANDORA_SEARCH_LIBREADLINE], [
save_LIBS="${LIBS}"
LIBS=""
AC_CACHE_CHECK([for a readline compatible library],
ac_cv_libreadline, [
ORIG_LIBS="$LIBS"
for readline_lib in readline edit editline; do
for termcap_lib in "" termcap curses ncurses; do
if test -z "$termcap_lib"; then
TRY_LIB="-l$readline_lib"
else
TRY_LIB="-l$readline_lib -l$termcap_lib"
fi
LIBS="$ORIG_LIBS $TRY_LIB"
AC_TRY_LINK_FUNC(readline, ac_cv_libreadline="$TRY_LIB")
if test -n "$ac_cv_libreadline"; then
break
fi
done
if test -n "$ac_cv_libreadline"; then
break
fi
done
if test -z "$ac_cv_libreadline"; then
ac_cv_libreadline="no"
LIBS="$ORIG_LIBS"
fi
])
if test "$ac_cv_libreadline" != "no"; then
AC_DEFINE(HAVE_LIBREADLINE, 1,
[Define if you have a readline compatible library])
AC_CHECK_HEADERS(readline.h readline/readline.h)
AC_CACHE_CHECK([whether readline supports history],
ac_cv_libreadline_history, [
ac_cv_libreadline_history="no"
AC_TRY_LINK_FUNC(add_history, ac_cv_libreadline_history="yes")
])
if test "$ac_cv_libreadline_history" = "yes"; then
AC_DEFINE(HAVE_READLINE_HISTORY, 1,
[Define if your readline library has \`add_history'])
AC_CHECK_HEADERS(history.h readline/history.h)
fi
fi
PANDORA_CHECK_RL_COMPENTRY
PANDORA_CHECK_RL_COMPLETION_FUNC
PANDORA_CHECK_TIOCGWINSZ
READLINE_LIBS="${LIBS}"
LIBS="${save_LIBS}"
AC_SUBST(READLINE_LIBS)
AM_CONDITIONAL(HAVE_LIBREADLINE, [test "x${ac_cv_libreadline}" = "xyes"])
])
AC_DEFUN([_PANDORA_HAVE_LIBREADLINE],[
AC_ARG_ENABLE([libreadline],
[AS_HELP_STRING([--disable-libreadline],
[Build with libreadline support @<:@default=on@:>@])],
[ac_enable_libreadline="$enableval"],
[ac_enable_libreadline="yes"])
_PANDORA_SEARCH_LIBREADLINE
])
AC_DEFUN([PANDORA_HAVE_LIBREADLINE],[
AC_REQUIRE([_PANDORA_HAVE_LIBREADLINE])
])
AC_DEFUN([_PANDORA_REQUIRE_LIBREADLINE],[
ac_enable_libreadline="yes"
_PANDORA_SEARCH_LIBREADLINE
AS_IF([test "x$ac_cv_libreadline" = "xno"],
PANDORA_MSG_ERROR([libreadline is required for ${PACKAGE}. On Debian this can be found in libreadline5-dev. On RedHat this can be found in readline-devel.]))
])
AC_DEFUN([PANDORA_REQUIRE_LIBREADLINE],[
AC_REQUIRE([_PANDORA_REQUIRE_LIBREADLINE])
])
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