dnl Get things going...
AC_INIT(rc.h)

RELDATE=`cat $srcdir/RELDATE`
AC_DEFINE_UNQUOTED(RELDATE, "$RELDATE")

dnl Automake stuff.
dnl Use this one for snapshots...
AM_INIT_AUTOMAKE(rc, 1.7s`echo $RELDATE |sed 's/-//g'`)
dnl ...and this one for releases
dnl AM_INIT_AUTOMAKE(rc, 1.7)

AM_CONFIG_HEADER(config.h)

dnl Find a standard C compiler
AC_PROG_CC
AM_PROG_CC_STDC

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_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

RC_SYS_V_SIGCLD

dnl Does the kernel handle `#! /interpreter'?
AC_SYS_INTERPRETER
case "$ac_cv_sys_interpreter" in
yes)  AC_DEFINE(HASH_BANG) ;;
esac
AM_CONDITIONAL(AMC_NO_HASHBANG, test "$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) ;;
odd)	AC_DEFINE(HAVE_PROC_SELF_FD) ;;
no)	AC_CHECK_FUNCS(mkfifo) ;;
esac

case "$ac_cv_func_mkfifo" in
yes)	AC_DEFINE(HAVE_FIFO) ;;
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),
	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),
	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),
	AC_DEFINE(PROTECT_ENV))

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


AC_ARG_WITH(editline, [  --with-editline         Simmule Turner's line editing],
	AC_CHECK_LIB(edit, readline,
		AC_DEFINE(EDITLINE) LIBS="$LIBS -ledit",
		AC_MSG_ERROR(editline library not found)))

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

AC_ARG_WITH(vrl, [  --with-vrl              Gert-Jan Vons's line editing],
	AC_CHECK_LIB(vrl, readline,
		AC_DEFINE(EDITLINE) LIBS="$LIBS -lvrl $rc_lib_tgetent",
		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.
AC_ARG_WITH(readline, [  --with-readline         Bloated GNU line editing], [
	AC_CHECK_LIB(readline, readline, [
		AC_DEFINE(READLINE)
		LIBS="$LIBS -lreadline $rc_lib_tgetent"
		AC_CHECK_LIB(readline, _rl_clean_up_for_exit, , AC_DEFINE(READLINE_OLD), $rc_lib_tgetent)
	], AC_MSG_ERROR(readline library not found), $rc_lib_tgetent)
])
AM_CONDITIONAL(AMC_READLINE, test "${with_readline+set}" = set)

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

AC_OUTPUT(Makefile)