On 08/10/2011 03:56 PM, Rainer Orth wrote:
"Joseph S. Myers"<jos...@codesourcery.com>  writes:

This is strange: they copy explicitly goes into $(gcc_objdir): from
libgcc/Makefile.in:

install-unwind_h:
         cp unwind.h $(gcc_objdir)/include/unwind.h
         chmod a+r $(gcc_objdir)/include/unwind.h

For an in-tree build, the source directory cannot be read-only, for a
VPATH build I don't see how this can happen.  Could you please check?

This is a VPATH build and the issue is that the *file* unwind.h is
readonly having been copied from a readonly source (and install-unwind_h

I see.  I'd been thinking of a source tree mounted read-only, not the
actual files changed to be read-only.

must, I suppose, end up getting called more than once so that the second
copy tries to copy over a readonly file; the 26478 fix was to remove the

True: it is called once per multilib.

Just to doublecheck, are we sure that unwind.h is always the same?

Paolo

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