dnl Our package name, version, ...
AC_INIT([rc], [1.7.4])

dnl ... and release date
DESCRIPTION=$(git describe || echo '(git description unavailable)')
AC_DEFINE_UNQUOTED(DESCRIPTION, "$DESCRIPTION", [Release date])

dnl Get things going...
AC_CONFIG_SRCDIR([rc.h])
AM_INIT_AUTOMAKE

AC_CONFIG_HEADERS(config.h)

dnl Find a standard C compiler
AC_PROG_CC

dnl If we're using gcc, specify `-Wall'.  I've also checked the code
dnl with `-pedantic -W -Wall -Wpointer-arith -Wstrict-prototypes
dnl -Wmissing-prototypes', and checked that all the warnings generated
dnl are harmless.
case "$GCC" in
yes) CFLAGS="-Wall $CFLAGS" ;;
esac

AC_SYS_LARGEFILE

AC_PROG_CPP
AC_PROG_YACC
AC_CHECK_PROGS(LN, ln cp)

AC_CHECK_HEADERS(sys/resource.h sys/time.h sys/types.h unistd.h)
AC_HEADER_DIRENT
AC_HEADER_STDC
AC_HEADER_SYS_WAIT

AC_TYPE_GETGROUPS
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_UID_T
AC_CHECK_TYPE(ssize_t, long)

AC_CHECK_FUNCS(getgroups lstat setpgrp setrlimit sigaction)

dnl We prefer system calls that don't restart.  If we have sigaction()
dnl we'll use it.  Otherwise, we check whether good ol' signal()
dnl produces interruptible system calls.
case "$ac_cv_func_sigaction" in
no) AC_SYS_RESTARTABLE_SYSCALLS ;;
esac
AM_CONDITIONAL(AMC_RESTART, test "$ac_cv_sys_restartable_syscalls" = yes)

RC_FUNC_GETGROUPS

RC_FUNC_SIGSETJMP

AC_FUNC_SETPGRP

RC_FUNC_STRERROR

RC_NEED_KERNEL

RC_TYPE_RLIM_T

RC_TYPE_SIG_ATOMIC_T

dnl Does the kernel handle `#! /interpreter'?
AC_SYS_INTERPRETER
case "$ac_cv_sys_interpreter" in
yes)  AC_DEFINE(HASH_BANG, 1, [Define to 1 if your kernel understands `#!' magic numbers]) ;;
esac
AM_CONDITIONAL(AMC_NO_HASHBANG, test "$ac_cv_sys_interpreter" = no)


dnl What do we do for command arguments?  We want /dev/fd or Linux's
dnl /proc/self/fd.  Failing that, we'll try for POSIX mkfifo(), or a
dnl mknod() that makes FIFOs.
RC_SYS_DEV_FD
case "$rc_cv_sys_dev_fd" in
yes)	AC_DEFINE(HAVE_DEV_FD, 1, [Define to 1 if you have /dev/fd.]) ;;
odd)	AC_DEFINE(HAVE_PROC_SELF_FD, 1, [Define to 1 if you have /proc/self/fd.]) ;;
no)	AC_CHECK_FUNCS(mkfifo) ;;
esac

case "$ac_cv_func_mkfifo" in
yes)	AC_DEFINE(HAVE_FIFO, 1, [Define to 1 if you have the `mkfifo' function.]) ;;
no)	RC_SYS_MKNOD_FIFO ;;
esac

dnl Now handle arguments.
AC_ARG_ENABLE(builtin-echo, [  --disable-builtin-echo  Don't include `echo' as a builtin],
	test "x$enableval" != "xno" && AC_DEFINE(RC_ECHO, 1, [Define to 1 to include `echo' as a builtin.]),
	AC_DEFINE(RC_ECHO))

AC_ARG_ENABLE(job, [  --disable-job           Don't do job-control-style backgrounding],
	test "x$enableval" != "xno" && AC_DEFINE(RC_JOB, 1, [Define to 1 to use job-control-style backgrounding.]),
	AC_DEFINE(RC_JOB))

AC_ARG_ENABLE(protect-env, [  --disable-protect-env   Don't protect environment names],
	test "x$enableval" != "xno" && AC_DEFINE(PROTECT_ENV, 1, [Define to 1 to encode exported environment names.]),
	AC_DEFINE(PROTECT_ENV))

AC_ARG_ENABLE(def-interp,
[  --enable-def-interp=/bin/foo
			  Use /bin/foo as default interpreter [[/bin/sh]]],
[
	case "$enableval" in
	no)
		;;
	yes)
		AC_DEFINE(DEFAULTINTERP, "/bin/sh", [The default interpreter])
		;;
	*)
		AC_DEFINE_UNQUOTED(DEFAULTINTERP, "$enableval")
	esac
],
	AC_DEFINE(DEFAULTINTERP, "/bin/sh"))

AC_ARG_ENABLE(def-path,
[  --enable-def-path=\"/usr/local/bin/\",\"/usr/bin\"
			  Default path [[All of these that exist
			  (/usr/local/bin /usr/bin /usr/bsd /usr/ucb /bin .)]]],
[
	case "$enableval" in
	no|yes)	;;
	*)	AC_DEFINE_UNQUOTED(DEFAULTPATH, $enableval, [The default path]) ;;
	esac
],
	enable_def_path=yes)

case "$enable_def_path" in
yes)	AC_CACHE_CHECK(extant directories for default path, rc_cv_def_path,[
		rc_cv_def_path=''
		for i in /usr/local/bin /usr/bin /usr/bsd /usr/ucb /bin .; do
			if test -d $i; then
				case "$rc_cv_def_path" in
				'')	rc_cv_def_path=\"$i\" ;;
				*)	rc_cv_def_path=$rc_cv_def_path,\"$i\" ;;
				esac
			fi
		done
	])
	AC_DEFINE_UNQUOTED(DEFAULTPATH, $rc_cv_def_path)
	;;
esac


AC_ARG_ENABLE(develop,
	[  --enable-develop        Include extra code for developers],[
	case "$enableval" in
	yes)
		rc_develop=true
		AC_DEFINE([RC_DEVELOP], 1, [Enable developer options]) ;;
	no)  ;;
	*)   AC_MSG_ERROR([bad value $enableval for --enable-develop]) ;;
	esac])
AM_CONDITIONAL(AMC_DEVELOP, test "$rc_develop" = true)


AC_ARG_WITH(history,
	[  --with-history          Build history subprograms],[
	case "$withval" in
	yes) rc_history=yes ;;
	*) rc_history=no ;;
	esac
	], rc_history=no)
AM_CONDITIONAL(AMC_HISTORY, test "$rc_history" = yes)


AC_ARG_WITH(addon, [  --with-addon[[=foo.c]]    Extra builtins, from addon.c by default ],[
	case "$withval" in
	yes)	ADDON=addon.o ;;
	no)	ADDON='' ;;
	*)	ADDON=`echo $withval |sed 's/\.c$/\.o/'` ;;
	esac
])
AM_CONDITIONAL(AMC_ADDON, test "$ADDON" != "")
case "$ADDON" in
?*) AC_DEFINE(RC_ADDON, 1, [Define to 1 to use addon functions.]) ;;
esac
AC_SUBST(ADDON)


EDIT=edit-null.o
AC_ARG_WITH(edit, [  --with-edit=(edit,editline,readline,vrl)  Command line editing library], [
	case $withval in
	yes)
		AC_MSG_ERROR(must specify which library)
		# might consider searching
		;;
	no|null)
		;;
	edit|bsd)
		EDIT=edit-edit.o
		RC_LIB_TGETENT
		AC_CHECK_LIB(edit, el_init, [
			LIBS="$LIBS -ledit $rc_lib_tgetent"
		], AC_MSG_ERROR(edit library not found), $rc_lib_tgetent)
		;;
	editline)
		EDIT=edit-editline.o
		RC_LIB_TGETENT
		AC_CHECK_LIB(editline, el_ring_bell, [
			LIBS="$LIBS -leditline $rc_lib_tgetent"
		], AC_MSG_ERROR(editline library not found), $rc_lib_tgetent)
		;;
	readline|gnu)
		EDIT=edit-readline.o
		RC_LIB_TGETENT
		AC_CHECK_LIB(readline, readline, [
			LIBS="$LIBS -lreadline $rc_lib_tgetent"
		], AC_MSG_ERROR(readline library not found), $rc_lib_tgetent)
		AC_TRY_LINK([
			#include <stdio.h>
			#include <readline/readline.h>
		], [
			rl_catch_signals = 0;
		], [], AC_MSG_ERROR(readline >= 4.0 not found))
		;;
	vrl)
		EDIT=edit-vrl.o
		RC_LIB_TGETENT
		AC_CHECK_LIB(vrl, iline_peekch, [
			LIBS="$LIBS -lvrl $rc_lib_tgetent"
		], AC_MSG_ERROR(vrl library not found), $rc_lib_tgetent)
		;;
	*)
		AC_MSG_ERROR(unknown editing library $withval)
		;;
	esac
])
AC_SUBST(EDIT)
dnl	AC_CHECK_LIB(edit, readline,
dnl		AC_DEFINE(EDITLINE, 1, [Define to 1 if you are using `editline' or `vrl'.]) LIBS="$LIBS -ledit",
dnl		AC_MSG_ERROR(editline library not found)))

dnl if test "${with_vrl+set}" = set -o "${with_readline+set}" = set; then
dnl	RC_LIB_TGETENT
dnl fi

dnl AC_ARG_WITH(vrl, [  --with-vrl              Gert-Jan Vons's line editing],
dnl	AC_CHECK_LIB(vrl, readline,
dnl		AC_DEFINE(EDITLINE) LIBS="$LIBS -lvrl $rc_lib_tgetent",
dnl		AC_MSG_ERROR(vrl library not found), $rc_lib_tgetent))

dnl There are (at least) two incompatible versions of readline, and we
dnl need to know which one we are using.  We don't support readline 2.0.
dnl AC_ARG_WITH(readline, [  --with-readline         Bloated GNU line editing], [
dnl 	AC_CHECK_LIB(readline, readline, [
dnl		AC_DEFINE(READLINE, 1, [Define to 1 if you are using GNU `readline'.])
dnl		LIBS="$LIBS -lreadline $rc_lib_tgetent"
dnl		AC_CHECK_LIB(readline, _rl_clean_up_for_exit, , AC_DEFINE(READLINE_OLD, 1, [Define to 1 for older versions GNU `readline'.]), $rc_lib_tgetent)
dnl	], AC_MSG_ERROR(readline library not found), $rc_lib_tgetent)
dnl ])
dnl AM_CONDITIONAL(AMC_READLINE, test "${with_readline+set}" = set)

dnl For some reason CPPFLAGS doesn't get propagated.
dnl AC_SUBST(CPPFLAGS)


AC_OUTPUT(Makefile)