[PATCH] Update backward/algo.h

[Gabriel Dos Reis]

Nathan Myers <ncm-nospam@cantrip.org> writes:

[...]

| I don't like seeing a carefully designed structure allowed to rot
| just because nobody can be bothered to understand why it was built,
| and then tearing it down because it was allowed to rot.
| 
| Gaby:
| 
| Do you have any reason to believe that src_dir != build_dir
| protects against gmake deleting files in src_dir?

Hi Nathan,

  When building the library with srcdir != builddir, the only thing
we do in ${srcdir} is invoking autools to generate the files they need
for creating Makefile.in and such.  That is all. In particular, make
won't delete files it wants to.

  That said, I trust you that when you initially wrote the general
guidelines,  you encountered some problems: I would like you give me a
workable algorithm to reproduce those problems.  I think that may
shade lights on the issue.

-- Gaby
CodeSourcery, LLC                       http://www.codesourcery.com