On Wed, 25 Mar 2015, Pedro F. Giffuni wrote:
Log:
Temporarily revert 280458.
GCC is still carries an old version of cdefs.h which doesn't
accept multiple parameters for the nonnull attribute.
Since this issue probably affects many ports in the tree
we will revert it for now until gcc gets fixed.
Note that sys/cdefs.h is supposed to work with any version of
gcc back to gcc-1, and does mostly work back to at least gcc-2.95.
The whole point of sys/cdefs.h is to provide compatibity macros
for old and other non-default compilers. Standard compilers don't
even have __attribute__(()). So no changes in future versions
of gcc will fix the previous commit.
The ifdefs for __nonnull() seem to be broken. They assume that
all versions of gcc >= 3.3 support the same semantics for __nonnull()
and that no non-gcc compiler supports the __nonnull__() attribute.
Non-gcc compilers like clang get this by pretending to be gcc.
Non-gcc compilers like icc tend to not get this by not pretending to
be gcc. __nonnull__() is one of the few attributes that is only a
hint, so definining it as nothing when it is not known to work is
correct.
Bruce
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