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Diffstat (limited to 'm4/ax_lib_readline.m4')
| -rw-r--r-- | m4/ax_lib_readline.m4 | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/m4/ax_lib_readline.m4 b/m4/ax_lib_readline.m4 new file mode 100644 index 0000000..352c55a --- /dev/null +++ b/m4/ax_lib_readline.m4 @@ -0,0 +1,124 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_lib_readline.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_LIB_READLINE_LLDPD +# +# 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 (); +# extern int rl_insert_text(const char*); +# extern void rl_forced_update_display(void); +# extern int rl_bind_key(int, int(*f)(int, int)); +# # 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. + +# Modified version. Original version is available here: +# http://www.gnu.org/software/autoconf-archive/ax_lib_readline.html + +#serial 6 + +AU_ALIAS([VL_LIB_READLINE], [AX_LIB_READLINE_LLDPD]) +AC_DEFUN([AX_LIB_READLINE_LLDPD], [ + AC_CACHE_CHECK([for a readline compatible library], + ax_cv_lib_readline, [ + _save_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 $TRY_LIB" + for readline_func in readline rl_insert_text rl_forced_update_display; do + AC_TRY_LINK_FUNC($readline_func, ax_cv_lib_readline="$TRY_LIB", ax_cv_lib_readline="") + if test -z "$ax_cv_lib_readline"; then + break + fi + done + 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 "$ax_cv_lib_readline"; then + ax_cv_lib_readline="no" + fi + LIBS="$_save_LIBS" + ]) + + if test "$ax_cv_lib_readline" != "no"; then + READLINE_LIBS="$ax_cv_lib_readline" + AC_SUBST(READLINE_LIBS) + + _save_LIBS="$LIBS" + LIBS="$LIBS $READLINE_LIBS" + AC_DEFINE(HAVE_LIBREADLINE, 1, + [Define if you have a readline compatible library]) + AC_CHECK_HEADERS(readline.h readline/readline.h) + AC_CACHE_CHECK([whether readline supports history], + ax_cv_lib_readline_history, [ + ax_cv_lib_readline_history="no" + AC_TRY_LINK_FUNC(add_history, ax_cv_lib_readline_history="yes") + ]) + if test "$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="$_save_LIBS" + fi +])dnl |