Move CXX platform-specific stuff into template files.

src/template/freebsd

@@ -2,5 +2,5 @@ CFLAGS='-pipe'
 
 case $host_cpu in
   alpha*)   CFLAGS="$CFLAGS -O";;
-            CXXFLAGS="$CXXFLAGS -O"
+            GCC_CXXFLAGS="-O"
 esac

src/template/osf

@@ -6,3 +6,4 @@ else
   CFLAGS='-O4 -Olimit 2000'
   CCC=cxx
 fi
+VENDOR_CXXFLAGS='-O4 -Olimit 2000'

src/template/unixware

@@ -3,3 +3,4 @@ if test "$GCC" = yes; then
 else
   CFLAGS='-O -K inline'
 fi
+VENDOR_CXXFLAGS="-O"