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* make arch __clone backends hiddenRich Felker2018-09-121-0/+1
| | | | | these are not a public interface and are not intended to be callable from anywhere but the public clone function or other places in libc.
* add m68k portRich Felker2018-06-193-0/+58
three ABIs are supported: the default with 68881 80-bit fpu format and results returned in floating point registers, softfloat-only with the same format, and coldfire fpu with IEEE single/double only. only the first is tested at all, and only under qemu which has fpu emulation bugs. basic functionality smoke tests have been performed for the most common arch-specific breakage via libc-test and qemu user-level emulation. some sysvipc failures remain, but are shared with other big endian archs and will be fixed separately.