[distcc] gcc-3.2 -MD -o misbehaviour

[Martin Pool]

The manual from Debian Sid's gcc-3.2 (3.2.1-0pre3) says

     If `-MD' is used in conjunction with `-E', any `-o' switch is
     understood to specify the dependency output file (but *note
     -MF::), but if used without `-E', each `-o' is understood to
     specify a target object file.

But this doesn't happen:

    !1169 15:18 /tmp/test% ls -l
    total 4
    -rw-r--r--    1 mbp      mbp            76 2002-10-02 14:44 hello.c
    !1171 15:18 /tmp/test% gcc-3.2 -MD -E -o hello.out hello.c
    !1172 15:18 /tmp/test% ls -la
    total 80
    drwxr-xr-x    2 mbp      mbp          4096 2002-10-02 15:18 .
    drwxrwxrwt   15 root     root        49152 2002-10-02 15:17 ..
    -rw-r--r--    1 mbp      mbp            76 2002-10-02 14:44 hello.c
    -rw-r--r--    1 mbp      mbp           536 2002-10-02 15:18 hello.d
    -rw-r--r--    1 mbp      mbp         18019 2002-10-02 15:18 hello.out

Actually I'm glad, this doesn't work.  Overriding -o to specify the
destination of dependency output seems needlessly complex since there
is already -MF.  Personally I'd prefer you pull this out of the
documentation rather than making -o actually specify the output file.

-- 
Martin