header includes. Include <sys/features.h> for
__GNUC_PREREQ__().
(__u?int.*_t): Define via GCC provided __U?INT.*_TYPE__ if
available.
(__intptr_t): Define.
(__uintptr_t): Likewise.
* libc/include/stdint.h: Include <machine/_default_types.h>
instead of <_ansi.h>.
(u?int.*_t): Define via __u?int.*_t provided by
<machine/_default_types.h>.
(u?int_fast.*_t): Define via GCC provided
__U?INT_FAST.*_TYPE__ if available.
(U?INT.*(MIN|MAX)): Define via GCC provided __U?INT.*(MIN|MAX)__
if available.
(U?INT.*_C): Define via GCC provided __U?INT.*_C if available.
* libc/include/sys/cdefs.h: Use <machine/_default_types.h>
instead of <stdint.h>.
* libc/sys/rtems/sys/cpuset.h: Likewise.
* libc/sys/rtems/machine/_types.h: Include <stdint.h> for
FreeBSD compatibility.
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