2014-06-26 17:04:19 +00:00
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# ===========================================================================
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2021-03-31 08:53:14 +00:00
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# https://www.gnu.org/software/autoconf-archive/ax_lib_readline.html
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2014-06-26 17:04:19 +00:00
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_LIB_READLINE
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#
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# DESCRIPTION
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#
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# Searches for a readline compatible library. If found, defines
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# `HAVE_LIBREADLINE'. If the found library has the `add_history' function,
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# sets also `HAVE_READLINE_HISTORY'. Also checks for the locations of the
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# necessary include files and sets `HAVE_READLINE_H' or
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# `HAVE_READLINE_READLINE_H' and `HAVE_READLINE_HISTORY_H' or
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# 'HAVE_HISTORY_H' if the corresponding include files exists.
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#
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# The libraries that may be readline compatible are `libedit',
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# `libeditline' and `libreadline'. Sometimes we need to link a termcap
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# library for readline to work, this macro tests these cases too by trying
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# to link with `libtermcap', `libcurses' or `libncurses' before giving up.
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#
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# Here is an example of how to use the information provided by this macro
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# to perform the necessary includes or declarations in a C file:
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#
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# #ifdef HAVE_LIBREADLINE
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# # if defined(HAVE_READLINE_READLINE_H)
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# # include <readline/readline.h>
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# # elif defined(HAVE_READLINE_H)
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# # include <readline.h>
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# # else /* !defined(HAVE_READLINE_H) */
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# extern char *readline ();
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# # endif /* !defined(HAVE_READLINE_H) */
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# char *cmdline = NULL;
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# #else /* !defined(HAVE_READLINE_READLINE_H) */
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# /* no readline */
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# #endif /* HAVE_LIBREADLINE */
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#
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# #ifdef HAVE_READLINE_HISTORY
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# # if defined(HAVE_READLINE_HISTORY_H)
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# # include <readline/history.h>
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# # elif defined(HAVE_HISTORY_H)
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# # include <history.h>
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# # else /* !defined(HAVE_HISTORY_H) */
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# extern void add_history ();
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# extern int write_history ();
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# extern int read_history ();
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# # endif /* defined(HAVE_READLINE_HISTORY_H) */
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# /* no history */
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# #endif /* HAVE_READLINE_HISTORY */
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#
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# LICENSE
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#
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# Copyright (c) 2008 Ville Laurikari <vl@iki.fi>
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#
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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2021-03-31 08:53:14 +00:00
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#serial 8
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2014-06-26 17:04:19 +00:00
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AU_ALIAS([VL_LIB_READLINE], [AX_LIB_READLINE])
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AC_DEFUN([AX_LIB_READLINE], [
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AC_CACHE_CHECK([for a readline compatible library],
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ax_cv_lib_readline, [
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ORIG_LIBS="$LIBS"
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2021-07-01 13:47:40 +00:00
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search_readlines="readline edit"
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if test "$with_readline" = "libreadline"; then
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search_readlines="readline"
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fi
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if test "$with_readline" = "libedit"; then
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search_readlines="edit"
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fi
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for readline_lib in $search_readlines; do
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# prefer ncurses since we use it for nmtui too
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2021-03-31 08:53:14 +00:00
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for termcap_lib in "" termcap curses ncurses; do
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2014-06-26 17:04:19 +00:00
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if test -z "$termcap_lib"; then
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TRY_LIB="-l$readline_lib"
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else
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TRY_LIB="-l$readline_lib -l$termcap_lib"
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fi
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LIBS="$ORIG_LIBS $TRY_LIB"
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2021-03-31 08:53:14 +00:00
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AC_LINK_IFELSE([AC_LANG_CALL([], [readline])], [ax_cv_lib_readline="$TRY_LIB"])
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2014-06-26 17:04:19 +00:00
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if test -n "$ax_cv_lib_readline"; then
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break
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fi
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done
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if test -n "$ax_cv_lib_readline"; then
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break
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fi
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done
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2021-03-31 08:53:14 +00:00
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if test -z "$ax_cv_lib_readline"; then
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ax_cv_lib_readline="no"
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fi
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2014-06-26 17:04:19 +00:00
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LIBS="$ORIG_LIBS"
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])
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2021-03-31 08:53:14 +00:00
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if test "$ax_cv_lib_readline" != "no"; then
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2021-04-23 11:56:12 +00:00
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READLINE_LIBS="$ax_cv_lib_readline"
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AC_SUBST(READLINE_LIBS)
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2021-03-31 08:53:14 +00:00
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AC_DEFINE(HAVE_LIBREADLINE, 1,
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[Define if you have a readline compatible library])
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2021-07-01 13:47:40 +00:00
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if test "$with_readline" = "libedit"; then
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AC_DEFINE(HAVE_EDITLINE_READLINE, 1,
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[Explicitly set to 1 when libedit shall be used])
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else
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AC_DEFINE(HAVE_EDITLINE_READLINE, 0,
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[By default the libreadline is used as readline library])
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fi
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2021-03-12 18:37:53 +00:00
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ORIG_LIBS="$LIBS"
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LIBS="$ORIG_LIBS $ax_cv_lib_readline"
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2021-03-31 08:53:14 +00:00
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AC_CACHE_CHECK([whether readline supports history],
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ax_cv_lib_readline_history, [
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ax_cv_lib_readline_history="no"
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2021-07-01 14:00:33 +00:00
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AC_LINK_IFELSE([AC_LANG_CALL([], [history_set_history_state])],
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[ax_cv_lib_readline_history="yes"])
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2021-03-31 08:53:14 +00:00
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])
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2021-03-12 18:37:53 +00:00
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LIBS=$ORIG_LIBS
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2021-03-31 08:53:14 +00:00
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if test "$ax_cv_lib_readline_history" = "yes"; then
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AC_DEFINE(HAVE_READLINE_HISTORY, 1,
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2021-07-01 13:47:40 +00:00
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[Define if your readline library has \`history_set_history_state'])
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AC_CHECK_HEADERS(readline/history.h histedit.h)
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else
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AC_DEFINE(HAVE_READLINE_HISTORY, 0,
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[Explicitly set to 0 when libreadline shall not be used])
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2021-03-31 08:53:14 +00:00
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fi
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2014-06-26 17:04:19 +00:00
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fi
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])dnl
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