dnl sxe-bldchain-progs.m4 -- Necessary build chain stuff

AC_DEFUN([SXE_PROG_MAKEINFO], [dnl
	AC_ARG_VAR([MAKEINFO], [the makeinfo command])
	AC_CHECK_TOOL([MAKEINFO], [makeinfo], [:], [$PATH])
	eval "$MAKEINFO --version > /dev/null 2>&1"
	if  test $? != 0; then
		if echo $MAKEINFO | grep -q "missing --run"; then
			# libtool missing has a much nicer error message
			$MAKEINFO
		fi
		# This should be a good enough error message even in complement
		# to the libtool missing
		AC_MSG_ERROR([
Could not find the makeinfo program. Check your PATH or install the texinfo package.
For more details see the INSTALL and PROBLEMS files.
SXEmacs generates the documentation during the build process.])
		exit 1
	fi
	SXE_MSG_CHECKING([makeinfo version])
        makeinfo_ver=`eval "$MAKEINFO" --version 2> /dev/null | head -n 1`
	SXE_MSG_RESULT([${makeinfo_ver}])
	AC_DEFINE_UNQUOTED(MAKEINFO_VERSION, "${makeinfo_ver}",
		          [the makeinfo command version])
        case `echo "$makeinfo_ver" | $SED -e 's/^.* \([[0-9.]]*\).*/\1/'`  in
	    [[1234]].*)
		AC_MSG_ERROR([
Your makeinfo program is too old. Please install 5.x or later.])
		exit 1
	    ;;
        esac
	AC_SUBST(MAKEINFO)
	AC_SUBST(MAKEINFO_VERSION)
])dnl SXE_PROG_MAKEINFO


AC_DEFUN([SXE_PROG_AR], [dnl
	AC_ARG_VAR([AR], [the ar command])
	AC_CHECK_TOOL([AR], [ar], [:], [$PATH])
	if test "$AR" = ":"; then
		AC_PATH_TOOL([USR_CCS_BIN_AR], [ar], [:],
			[$PATH:/usr/ccs/bin])
	fi
	if test "$AR" = ":" -a "$USR_CCS_BIN_AR" = ":"; then
		AC_MSG_ERROR([Uh oh, no ar is rilly bad news.])
	elif test "$AR" = ":"; then
		AR=$USR_CCS_BIN_AR
	fi
	AC_SUBST(AR)
])dnl SXE_PROG_AR


AC_DEFUN([SXE_PROG_BISON], [
	AC_PROG_YACC()
	SXE_MSG_CHECKING([for bison])
	if test "$YACC" != "bison -y"; then
		AC_SUBST([BISON], [:], [location of bison])
		have_bison="no"
		sxe_cv_feat_bison="no"
		dnl AC_MSG_ERROR([bison not found but required])
	else
		AC_SUBST([BISON], [bison], [location of bison])
		have_bison="yes"
		sxe_cv_feat_bison="yes"
	fi
	SXE_MSG_RESULT([${sxe_cv_feat_bison}])

	## check if bison is capable
	if test "$sxe_cv_feat_bison" = "yes"; then
		SXE_MSG_CHECKING([if bison is recent enough])
		sxe_cv_feat_bison_version="$(${BISON} --version | head -n1)"
		case "$sxe_cv_feat_bison_version" in
		*\ 2.7* | *\ 3.*)
			;;
		*)
			have_bison="no"
			;;
		esac
		SXE_MSG_RESULT([${have_bison} (${sxe_cv_feat_bison_version})])
	fi
])dnl SXE_PROG_BISON


AC_DEFUN([SXE_CHECK_AUTOTOOL], [dnl
	## arg 1 tool's binary name
	## arg 2 sxemacs_version.m4's name
	## arg 3 config.h.in description
	pushdef([autotool], [$1])
	pushdef([AUTOTOOL], translit($1, [-a-z], [_A-Z]))
	pushdef([v3rs1on], indir($2))
	pushdef([descr], [$3])

	AC_MSG_CHECKING([for ]autotool[ version])
	AC_MSG_RESULT(v3rs1on)
	AC_DEFINE_UNQUOTED(AUTOTOOL[_VERSION], "v3rs1on", descr)

	popdef([descr])
	popdef([v3rs1on])
	popdef([AUTOTOOL])
	popdef([autotool])
])dnl SXE_CHECK_AUTOTOOL

AC_DEFUN([SXE_CHECK_AUTOTOOLS], [dnl
	## brag about the autotools versions
	m4_ifdef([4UTOCONF_VERSION], [dnl
		SXE_CHECK_AUTOTOOL([autoconf], [4UTOCONF_VERSION],
			[version of autoconf used to build the configure script])])
	m4_ifdef([4UTOHEADER_VERSION], [dnl
		SXE_CHECK_AUTOTOOL([autoheader], [4UTOHEADER_VERSION],
			[version of autoheader used to build the config.h.in])])
	m4_ifdef([4CLOCAL_VERSION], [dnl
		SXE_CHECK_AUTOTOOL([aclocal], [4CLOCAL_VERSION],
			[version of aclocal used to incorporate m4 macros])])
	m4_ifdef([4UTOMAKE_VERSION], [dnl
		SXE_CHECK_AUTOTOOL([automake], [4UTOMAKE_VERSION],
			[version of automake used to build the Makefiles])])
	m4_ifdef([4IBTOOL_VERSION], [dnl
		SXE_CHECK_AUTOTOOL([libtool], [4IBTOOL_VERSION],
			[version of libtool used to provide portable linking])])
])dnl SXE_CHECK_AUTOTOOLS


dnl recommended interface function
AC_DEFUN([SXE_CHECK_BUILDCHAIN], [dnl
	AC_PROG_LN_S
	AC_PROG_AWK
	AC_PROG_EGREP
	AC_PROG_FGREP
	AC_PROG_INSTALL

	SXE_CHECK_AUTOTOOLS
	SXE_CHECK_USER_VARS

dnl	dnl Soon ...
dnl	dnl m4_ifdef([LT_INIT], [LT_INIT], [AC_PROG_LIBTOOL])
	AC_PROG_RANLIB
	SXE_PROG_AR
	SXE_PROG_MAKEINFO
])dnl SXE_CHECK_BUILDCHAIN

dnl recommended interface macro for parser/lexer
AC_DEFUN([SXE_CHECK_PARSER_LEXER], [dnl
	SXE_PROG_BISON
	AC_PROG_LEX
	AM_PROG_LEX
])dnl SXE_CHECK_PARSER_LEXER


dnl sxe-bldchain-progs.m4 ends here