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On 03/22/2017 12:35 PM, Zack Weinberg wrote:
what would you think of splitting getopt.h in gnulib into three files? getopt_posix.h with just the stuff that glibc wants in unistd.h, getopt_ext.h with all the extensions, and getopt.h which is the public wrapper that includes both of them and has all the non-glibc compatibility logic. getopt_posix.h and getopt_ext.h would be shared between gnulib and glibc, but getopt.h would_not_ be shared. glibc would install getopt_posix.h and getopt_ext.h in the bits subdirectory, and it would provide its own getopt.h that doesn't have any of the compatibility logic.
That all sounds doable. getopt.h is not shared now, so it's not much of a change from gnulib's point of view. (I'd like to have getopt.h be shared too, but that's a different topic.)
FYI the following other __need_* symbols are used in both glibc and gnulib: __need_error_t, __need_FILE, __need___FILE, __need_NULL, __need_sigset_t, __need_size_t, and __need_wint_t. I don't offhand see problems with them either.
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