tmpfs: strange behaviour

[Oliver Fromme]

David Naylor wrote:
 > Oliver Fromme wrote:
 > > What is the exact CFLAGS setting that you use?
 > > Do you use -O2 (or -Os) without -fno-strict-aliasing?
 > 
 > I have managed to isolate the problem and it is definitely tmpfs
 > related.  If the directory that I'm installing into is tmpfs then it
 > will fail, if it is ufs then it works.
 > 
 > I recompiled tmpfs module (and reloaded) with CFLAGS='' with the same result.
 > 
 > As an aside I have found that the default CFLAGS for src are: -O2
 > -fno-strict-aliasing -pipe.

For most parts of src, but some override it.

 > Would -fstrict-aliasing break anything in base/sys?

I think src/sys is clean with regards to aliasing, but I'm
not 100% sure.  Someone please correct me if I'm wrong.

I recommend not to put a CFLAGS line in /etc/make.conf at
all.  So far I haven't seen an example of a really useful
CFLAGS line in this thread, but several examples that could
possibly cause damage.  It's best not to override the
default (which is there for a reason).

If you want better optimization, a appropriate CPUTYPE=...
line is probably a better idea.

Best regards
   Oliver

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