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dnl @synopsis AC_LIB_READLINE
dnl
dnl @obsoleted Renamed to VL_LIB_READLINE.
dnl
dnl Searches for a readline compatible library. If found, defines
dnl `HAVE_LIBREADLINE'. If the found library has the `add_history'
dnl function, sets also `HAVE_READLINE_HISTORY'. Also checks for the
dnl locations of the necessary include files and sets `HAVE_READLINE_H'
dnl or `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or
dnl 'HAVE_HISTORY_H' if the corresponding include files exists.
dnl
dnl The libraries that may be readline compatible are `libedit',
dnl `libeditline' and `libreadline'. Sometimes we need to link a
dnl termcap library for readline to work, this macro tests these cases
dnl too by trying to link with `libtermcap', `libcurses' or
dnl `libncurses' before giving up.
dnl
dnl Here is an example of how to use the information provided by this
dnl macro to perform the necessary includes or declarations in a C
dnl file:
dnl
dnl #include <config.h>
dnl
dnl #ifdef HAVE_LIBREADLINE
dnl #if defined(HAVE_READLINE_READLINE_H)
dnl #include <readline/readline.h>
dnl #elif defined(HAVE_READLINE_H)
dnl #include <readline.h>
dnl #else /* !defined(HAVE_READLINE_H) */
dnl extern char *readline ();
dnl #endif /* !defined(HAVE_READLINE_H) */
dnl char *cmdline = NULL;
dnl #else /* !defined(HAVE_READLINE_READLINE_H) */
dnl /* no readline */
dnl #endif /* HAVE_LIBREADLINE */
dnl
dnl #ifdef HAVE_READLINE_HISTORY
dnl #if defined(HAVE_READLINE_HISTORY_H)
dnl #include <readline/history.h>
dnl #elif defined(HAVE_HISTORY_H)
dnl #include <history.h>
dnl #else /* !defined(HAVE_HISTORY_H) */
dnl extern void add_history ();
dnl extern int write_history ();
dnl extern int read_history ();
dnl #endif /* defined(HAVE_READLINE_HISTORY_H) */
dnl /* no history */
dnl #endif /* HAVE_READLINE_HISTORY */
dnl
dnl @category Obsolete
dnl @author Ville Laurikari <vl@iki.fi>
dnl @version 2005-01-25
dnl @license GPLWithACException
AC_DEFUN([AC_LIB_READLINE], [
AC_CACHE_CHECK([for a readline compatible library],
ac_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 $TRY_LIB"
AC_TRY_LINK_FUNC(readline, ac_cv_lib_readline="$TRY_LIB")
if test -n "$ac_cv_lib_readline"; then
break
fi
done
if test -n "$ac_cv_lib_readline"; then
break
fi
done
if test -z "$ac_cv_lib_readline"; then
ac_cv_lib_readline="no"
LIBS=$ORIG_LIBS
fi
])
if test "$ac_cv_lib_readline" != "no"; then
AC_DEFINE(HAVE_LIBREADLINE, 1,
[Define if you have a readline compatible library])
AC_CHECK_HEADERS(readline.h readline/readline.h)
AC_CACHE_CHECK([whether readline supports history],
ac_cv_lib_readline_history, [
ac_cv_lib_readline_history="no"
AC_TRY_LINK_FUNC(add_history, ac_cv_lib_readline_history="yes")
])
if test "$ac_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
fi
])
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