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6ea09a138a
Clean up various left over commented lines from dlopen to single libhamlib transition. Remove unneeded configure variables. Correct minor inconsistencies in Makefile.am files. Define a new variable, READLINE_LIBS, so that only programs that offer Readline support are linked against it. Fix various compilation warnings and errors in test files revealed with 'make check' on MinGW. Define rig and rotor backends to (mostly) be built in alphabetical order.
114 lines
3.9 KiB
Plaintext
114 lines
3.9 KiB
Plaintext
# ===========================================================================
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# http://www.gnu.org/software/autoconf-archive/ax_lib_readline.html
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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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#serial 6.1
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# For Hamlib, set READLINE_LIBS instead of LIBS
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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="$LIBS"
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for readline_lib in readline edit editline; do
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for termcap_lib in "" termcap curses ncurses; do
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if test -z "$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 $TRY_LIB"
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AC_TRY_LINK_FUNC(readline, ax_cv_lib_readline="$TRY_LIB")
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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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if test -z "$ax_cv_lib_readline"; then
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ax_cv_lib_readline="no"
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fi
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LIBS="$ORIG_LIBS"
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])
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if test "$ax_cv_lib_readline" != "no"; then
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ORIG_LIBS="$LIBS"
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LIBS="$LIBS $ax_cv_lib_readline"
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AC_DEFINE(HAVE_LIBREADLINE, 1,
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[Define if you have a readline compatible library])
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AC_CHECK_HEADERS(readline.h readline/readline.h)
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AC_CACHE_CHECK([whether readline supports history],
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ax_cv_lib_readline_history, [
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ax_cv_lib_readline_history="no"
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AC_TRY_LINK_FUNC(add_history, ax_cv_lib_readline_history="yes")
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])
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if test "$ax_cv_lib_readline_history" = "yes"; then
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AC_DEFINE(HAVE_READLINE_HISTORY, 1,
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[Define if your readline library has \`add_history'])
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AC_CHECK_HEADERS(history.h readline/history.h)
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fi
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LIBS="$ORIG_LIBS"
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READLINE_LIBS="$ax_cv_lib_readline"
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AC_SUBST([READLINE_LIBS])
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fi
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])dnl
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