On Windows we already had a way to override the /java location:
JDK_JAVA_DRIVE. The new SLASH_JAVA basically just generalizes
JDK_JAVA_DRIVE to work with other platforms. So far, so good.
But:
1. Use of JDK_JAVA_DRIVE should be, um, deprecated, in favor
    of this new scheme. Maybe delete it altogether, causing a
    one-time flag day but cleaning up the makefiles permanently.
2. This requires that the ALT_SLASH_JAVA environment variable
    be respected in the usual ALT_XXX way. Currently it is not.
3. ALT_SLASH_JAVA would be good to have even in the absence
    of JDK_JAVA_DRIVE. At the time I "mount" my /java drive I want
    to set this environment variable and forget about it; I don't
    want to have to type it every time I run gnumake.



###@###.### 2005-04-07 07:09:41 GMT
###@###.### 2005-04-07 23:51:11 GMT