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Re: [PATCH] add -foverride-comp-dir

On Wed, Sep 27, 2006 at 12:25:32AM -0700, Geoffrey Keating wrote:
> Dan Aloni <> writes:
> > Hello,
> > 
> > The following patch adds a new switch to gcc that allows to override
> > the DW_AT_comp_dir DWARF2 attribute. The reason why I need this change
> > is that one of our project's build system is using content-hashing in
> > order to save build and compilation time among several developers that 
> > are working on that project. 
> > 
> > When debug information is used, we need to make sure that that the
> > result binaries are identical if compiled from the same source between 
> > several developers working from different directories, and also to be 
> > able to look at core files from gdb with proper (i.e. path-relative) 
> > source code lookup. By simply passing -foverride-comp-dir=. to gcc
> > after this feature is patched in, we are able to achieve our goals.
> Would it be better to simply have a -fno-comp-dir flag, to omit this
> information entirely from the DWARF output?

A related FYI: While it won't help with the content-hashing, the GDB
side of this is addressed by the recently added substitution commands
in CVS.

Daniel Jacobowitz

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