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c/1881: gcc -M output has changed--breaks make's automatic prereqs

To: gcc-gnats at gcc dot gnu dot org
Subject: c/1881: gcc -M output has changed--breaks make's automatic prereqs
From: cljanss at ca dot sandia dot gov
Date: 6 Feb 2001 01:27:37 -0000
Reply-To: cljanss at ca dot sandia dot gov


>Number:         1881
>Category:       c
>Synopsis:       gcc -M output has changed--breaks make's automatic prereqs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Feb 05 17:36:00 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Curtis Janssen
>Release:        gcc version 2.97 20010205 (experimental)
>Organization:
>Environment:
SuSE 7.0
>Description:
gcc -M now outputs the full pathname to the source file
rather than the basename.  This can break source trees
that separate obj & src code and do automatic
prerequisite generation.  The object files now end up in
the source tree.
>How-To-Repeat:
Untar attachment.  cd into dep/obj.  Update
Makefile to point to a recent gcc 2.97. Run make.  The
object will be in the source directory.  Repeat
with gcc 2.95.2 (for example) and it will work ok--
the dep.o file will be in the obj directory.
>Fix:

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