#
# OVERVIEW
#
-# Check for readline support. Defines HAVE_READLINE if readline
+# Check for readline support. Defines HAVE_LIBREADLINE if readline
# is available, and also checks for a number of readline headers and
# adds readline libraries to READLINE_LIBS.
#
# See common-src/util.{c,h}.
#
+#
+# Some idea taken from AX_LIB_READLINE:
+# ===========================================================================
+# http://www.gnu.org/software/autoconf-archive/ax_lib_readline.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_LIB_READLINE
+#
+# 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 */
+#
+# LICENSE
+#
+# Copyright (c) 2008 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. This file is offered as-is, without any
+# warranty.
+
+#serial 6
+
AC_DEFUN([AMANDA_CHECK_READLINE], [
- AC_ARG_WITH(readline,
- dnl no initial space here, so the results line up properly
+ AC_ARG_WITH(readline,
+ dnl no initial space here, so the results line up properly
AS_HELP_STRING([--with-readline], [require readline support (for amrecover)])
AS_HELP_STRING([--without-readline], [don't search for readline]),
- [
- case "$withval" in
- y | ye | yes | n | no) : ;;
- *) AC_MSG_ERROR([*** --with-readline does not take a value])
- esac
- want_readline="$withval"
- ], [
- want_readline="maybe" # meaning "only if we can find it"
- ])
+ [
+ case "$withval" in
+ y | ye | yes | n | no) : ;;
+ *) AC_MSG_ERROR([*** --with-readline does not take a value])
+ esac
+ want_readline="$withval"
+ ], [
+ want_readline="maybe" # meaning "only if we can find it"
+] )
- # unless the user said "no", look for readline.
- if test x"$want_readline" != x"no"; then
- # we need a tgetent() somewhere..
- proceed="false"
- AC_CHECK_LIB(termcap, tgetent, [
- READLINE_LIBS="-ltermcap"
- proceed="true"
- ], [
- AC_CHECK_LIB(curses, tgetent, [
- READLINE_LIBS="-lcurses"
- proceed="true"
- ], [
- AC_CHECK_LIB(ncurses, tgetent, [
- READLINE_LIBS="-lncurses"
- proceed="true"
- ])
- ])
- ])
- if $proceed; then
- proceed="false"
- AC_CHECK_HEADERS( history.h readline.h readline/history.h readline/readline.h, [
- # found at least one of the headers, so we can proceed.
- proceed="true"
- ])
+ # unless the user said "no", look for readline.
+ if test x"$want_readline" != x"no"; then
+ AC_CACHE_CHECK([for a readline compatible library],
+ ax_cv_lib_readline, [
+ 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 $TRY_LIB"
+ AC_TRY_LINK_FUNC(readline, ax_cv_lib_readline="$TRY_LIB")
+ if test -n "$ax_cv_lib_readline"; then
+ break
+ fi
+ done
+ if test -n "$ax_cv_lib_readline"; then
+ break
fi
+ done
+ if test -z "$ax_cv_lib_readline"; then
+ ax_cv_lib_readline="no"
+ fi
+ LIBS="$ORIG_LIBS"
+ ])
- if $proceed; then
- proceed="false"
- AC_CHECK_LIB(readline,readline, [
- READLINE_LIBS="-lreadline $READLINE_LIBS"
- proceed="true"
- ],,$READLINE_LIBS)
- fi
+ if test "$ax_cv_lib_readline" != "no"; then
+ ORIG_LIBS="$LIBS"
+ LIBS="$LIBS $ax_cv_lib_readline"
+ READLINE_LIBS="$ax_cv_lib_readline"
+ 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],
+ ax_cv_lib_readline_history, [
+ ax_cv_lib_readline_history="no"
+ AC_TRY_LINK_FUNC(add_history, ax_cv_lib_readline_history="yes")
+ ])
+ if test "$ax_cv_lib_readline_history" = "yes"; then
+ AC_DEFINE(HAVE_READLINE_HISTORY, 1,
+ [Define if your readline library has \`add_history'])
+ AC_CHECK_HEADERS(history.h readline/history.h)
+ fi
+ LIBS="$ORIG_LIBS"
- if $proceed; then
- # we have readline!
- AC_DEFINE(HAVE_READLINE, 1, [System has readline support (headers and libraries)])
- else
- # no readline. if the user *really* wanted it, bail out.
- if test x"$want_readline" = x"yes"; then
- AC_MSG_ERROR([*** No readline implementation found. Try using --with-libraries and --with-includes])
- fi
- READLINE_LIBS=""
- fi
+ else
+ # no readline. if the user *really* wanted it, bail out.
+ if test x"$want_readline" = x"yes"; then
+ AC_MSG_ERROR([*** No readline implementation found. Try using --with-libraries and --with-includes])
+ fi
+ READLINE_LIBS=""
fi
- AC_SUBST(READLINE_LIBS)
-])
+ fi
+ AC_SUBST(READLINE_LIBS)
+])dnl
projects / debian / amanda / blobdiff