# =========================================================================== # 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 AU_ALIAS([VL_LIB_READLINE], [AX_LIB_READLINE]) AC_DEFUN([AX_LIB_READLINE], [ 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 test "$ax_cv_lib_readline" != "no"; then LIBS="$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 fi ])dnl