…cking whether a pointer is captured.

…kframes.

… spindles when lowering taskframes.

…t requires enclosing the inlined-function body within a taskframe.

…ctions recognized by LLVM.

…ns from a bitcode file.

…required to build the OpenCilk runtime.

…mpile time, rather than using dynamic interpositioning. This change avoids recursion problems when third-party libraries, such as jemalloc, use these locking routines.

…y- or intrinsic-function calls. The weak-symbol approach previously used to insert calls to a default libhook does not work when Cilksan is dynamically linked, which is necessary on some platforms.

… pthread_once for Cilksan.