SF patch #719359, fix test_long failure on OSF/1 with vendor cc

This also fixes several other bugs and patches by providing
the proper arguments to cc:  738066 and 741806 need -ieee,
693094 needs -std
diff --git a/configure.in b/configure.in
index aae3eca..4d3af9d 100644
--- a/configure.in
+++ b/configure.in
@@ -646,6 +646,9 @@
     OpenUNIX*|UnixWare*)
 	BASECFLAGS="$BASECFLAGS -K pentium,host,inline,loop_unroll,alloca "
 	;;
+    OSF*)
+	BASECFLAGS="$BASECFLAGS -ieee -std"
+    	;;
     SCO_SV*)
 	BASECFLAGS="$BASECFLAGS -belf -Ki486 -DSCO5"
 	;;