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810e33125b
* Move clang/gcc options into makefile-header. This puts all of the shared options into a single place so that we can easily update it. * Add -fwrapv to the clang/gcc command lines. This is a step along the way to fixing interlisp/medley#90. Enabling `-fwrapv` will let overflow checks that rely upon undefined behavior to work correctly. Without this, with modern versions of clang and gcc, the overflow checks in the C code are eliminated by the compiler, resulting in incorrect behavior on the part of Maiko. See the linked bug for details and discussion. Hopefully, this usage of `-fwrapv` will go away once we're using the correct compiler builtins to detect and handle overflow correctly.
FILES USED IN THIS DIRECTORY config.guess config.sub taken from GNU project's "config" directory, on prep.ai.mit.edu/pub/gnu/config. Update 'em as needed.