gcc4: missing atomic builtins?

Fri Mar 27 21:38:00 GMT 2009

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Dave,

Building djvulibre-3.5.21 with gcc4, while linking libdjvulibre:

.libs/atomic.o:atomic.cpp:(.text+0x3b): undefined reference to
`___sync_bool_compare_and_swap_4'
.libs/atomic.o:atomic.cpp:(.text+0x65): undefined reference to
`___sync_add_and_fetch_4'

Some googling shows that the culprit *may be* gcc4:

http://sourceware.org/ml/crossgcc/2008-06/msg00022.html

Any ideas?

Yaakov
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