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Joseph S. Myers wrote:On Wed, 12 Aug 2009, Andrew Haley wrote:
Some targets, particularly ARM, don't have instructions for things such as sync_compare_and_swap. Instead, a routine in libgcc is used. This patch adds a new gcj option, -fuse-atomic-builtins, which causes gcj to use the routines in libgcc whenever atomic operations are needed.Wouldn't a target hook to allow a target to declare which operations it provides in libgcc be better than a command-line option?
Maybe it would. I'm happy to work with anyone to create such a thing. What would such a hook look like, and how would a front- end use it?
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