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Working back support for CLISP 2.27. * code/install.sh: Bogus *null-pointer* hack is no longer added to the generated mcvs script, since we have our own FFI functions for doing the test. * code/unix-bindings/unix.lisp (unix-funcs:null-pointer-p): New function, tests a C pointer for null, returns T or NIL. * code/unix-bindings/impl.c (impl_null_pointer_p): New function, C implementation of unix-funcs:null-pointer-p. * code/clisp-unix.lisp (pointer-null): New macro, uses ffi:foreign-address-null under CLISP 2.28 or greater, or unix-funcs:null-pointer-p, under an older CLISP.
Retargetting CVS with new system call bindings that are not GNU/Linux specific.
* clisp-linux.sh (:clisp-old): Added to *features* for CLISP 2.28 or higher. (*null-pointer*): Only defined when :clisp-old is present. (pointer-null): Use new ffi:foreign-pointer-null if :clisp-old feature is not present. * install.sh: Don't do *null-pointer* workaround hack unless :clisp-old feature is present in the memory image.
* update.lisp (mcvs-update): Re-print the "Invoking CVS" chatter if the user re-tries the error. * add.lisp (mcvs-add): CVS failure is now a restartable error; user can decide whether to roll back the effects, retry the CVS add, or keep the effects anyway despite the failed add. * install.sh: Stop the script if there are compilation errors.
Ugly hack to reset *null-pointer* after loading memory image, because CLISP changes the representation of a pickled *null-pointer*.
Adding simple installer.
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