dnl @synopsis 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 termcap dnl library for readline to work, this macro tests these cases too by dnl trying to link with `libtermcap', `libcurses' or `libncurses' before dnl 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 file: dnl dnl #ifdef HAVE_LIBREADLINE dnl # if defined(HAVE_READLINE_READLINE_H) dnl # include dnl # elif defined(HAVE_READLINE_H) dnl # include 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 dnl # elif defined(HAVE_HISTORY_H) dnl # include 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 dnl @version 1.1 dnl @author Ville Laurikari dnl AC_DEFUN([VL_LIB_READLINE], [ AC_CACHE_CHECK([for a readline compatible library], vl_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 $TRY_LIB" AC_TRY_LINK_FUNC(readline, vl_cv_lib_readline="$TRY_LIB") if test -n "$vl_cv_lib_readline"; then break fi done if test -n "$vl_cv_lib_readline"; then break fi done if test -z "$vl_cv_lib_readline"; then vl_cv_lib_readline="no" LIBS="$ORIG_LIBS" fi ]) if test "$vl_cv_lib_readline" != "no"; then AC_DEFINE(HAVE_LIBREADLINE, 1, [Define if you have a readline compatible library]) AC_CHECK_HEADERS(readline.h readline/readline.h) AC_CACHE_CHECK([whether readline supports history], vl_cv_lib_readline_history, [ vl_cv_lib_readline_history="no" AC_TRY_LINK_FUNC(add_history, vl_cv_lib_readline_history="yes") ]) if test "$vl_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 ])dnl