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Subject: misc/16162: shared /usr/src isn't  because .depend files are not shareable
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>Number:         16162
>Category:       misc
>Synopsis:       shared /usr/src isn't  because .depend files are not shareable
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 17 12:40:02 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     Matthew Jacob
>Release:        FreeBSD 4.0-CURRENT alpha
>Organization:
Feral Software
>Environment:

-current as of the last day or so.


>Description:

You can no longer share /usr/src between i386 && alpha. In fact,
I don't really see how shared source can work at all. 

The problem here is that, at least for building bootstrap tools, several
derived files that contain platform specific information end up in /usr/src-
not in OBJDIR. This leads to breakage right away because .depend's are
radically different between alpha and i386:

echo yacc: /usr/obj/usr/src/alpha/usr/lib/libc.a  >> .depend
cc -O -pipe   -I/usr/obj/usr/src/alpha/usr/include -c /usr/src/usr.bin/yacc/closure.c
cc -O -pipe   -I/usr/obj/usr/src/alpha/usr/include -c /usr/src/usr.bin/yacc/error.c
cc -O -pipe   -I/usr/obj/usr/src/alpha/usr/include -c /usr/src/usr.bin/yacc/lalr.c
cc -O -pipe   -I/usr/obj/usr/src/alpha/usr/include -c /usr/src/usr.bin/yacc/lr0.c
make: don't know how to make /usr/include/machine/trap.h. Stop
*** Error code 2

Stop in /usr/src.

>How-To-Repeat:

Share a source tree between an alpha and an i386 and try and do
a buildworld. Or share a /usr/src between to i386 machines each with
different include locations such that the .depend files would be
not compatible.

>Fix:

Put *all* derived files in OBJDIR.


>Release-Note:
>Audit-Trail:
>Unformatted:


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