dnl We use a path for perl so the #! line in autoscan will work.	
AC_DEFUN([AX_PROG_PERL],[
	AC_PATH_PROG([PERL], perl, no)
	AC_SUBST([PERL])dnl

	if test "$PERL" = no; then
		AC_MSG_ERROR([perl is not found])
	fi
	AC_MSG_CHECKING(for perl version >= $1)
	if `$PERL -e 'require $1;' >> /dev/null 2>&1` ; then
		AC_MSG_RESULT(yes)
	else
		AC_MSG_ERROR([Perl $1 or better is required])
	fi
	AC_PROVIDE([$0])
])

dnl should be called after AX_PROG_PERL
AC_DEFUN([AX_PERL_MOD_LOG4PERL],[
	if ! `$PERL -MLog::Log4perl -e 1 > /dev/null 2>&1` ; then
		AC_MSG_ERROR([Could not import perl Log::Log4perl module.  Make sure it is installed in a directory that is on your default or PERL5LIB path])
	fi
	if ! `$PERL -MLog::Dispatch -e 1 > /dev/null 2>&1` ; then
		AC_MSG_ERROR([Could not import perl Log::Dispatch module.  Make sure it is installed in a directory that is on your default or PERL5LIB path])
	fi
	AC_PROVIDE([$0])
])

dnl should be called after AX_PROG_PERL
AC_DEFUN([AX_PERL_MOD_EXCEPTION_CLASS],[
	if ! `$PERL -MException::Class -e 1 > /dev/null 2>&1` ; then
		AC_MSG_ERROR([Could not import perl Exception::Class module.  Make sure it is installed in a directory that is on your default or PERL5LIB path])
	fi
	AC_PROVIDE([$0])
])

dnl should be called after AX_PROG_PERL
AC_DEFUN([AX_PERL_MOD_MATH_RANDOM],[
	if ! `$PERL -MMath::Random -e 1 > /dev/null 2>&1` ; then
		AC_MSG_ERROR([Could not import perl Math::Random module.  Make sure it is installed in a directory that is on your default or PERL5LIB path])
	fi
	AC_PROVIDE([$0])
])

dnl should be called after AX_PROG_PERL
AC_DEFUN([AX_PERL_MOD_SVG],[
	if ! `$PERL -MSVG -e 1 > /dev/null 2>&1` ; then
		AC_MSG_ERROR([Could not import perl SVG module.  Make sure it is installed in a directory that is on your default or PERL5LIB path])
	fi
	AC_PROVIDE([$0])
])