@@ -187,10 +187,11 @@
 
 	AC_SUBST(ARCHS)
 ])
 
 AC_DEFUN(DC_SETUP_TCL_PLAT_DEFS, [
+	AC_CANONICAL_BUILD
 	AC_CANONICAL_HOST
   
 	AC_MSG_CHECKING(host operating system)
 	AC_MSG_RESULT($host_os)
   
@@ -317,11 +318,13 @@
 
   AC_MSG_RESULT($SHOBJLDFLAGS $SHOBJFLAGS)
 ])
 
 AC_DEFUN(DC_CHK_OS_INFO, [
+	AC_CANONICAL_BUILD
 	AC_CANONICAL_HOST
+
 	AC_SUBST(SHOBJEXT)
 	AC_SUBST(AREXT)
         AC_SUBST(SHOBJFLAGS)
         AC_SUBST(SHOBJLDFLAGS)