Hello, I just tried out this pr and found the following error

cpython/Modules/nismodule.c:17:10: fatal error: rpc/rpc.h: No such file or directory
   17 | #include <rpc/rpc.h>
      |          ^~~~~~~~~~~
compilation terminated.

Hello, I just tried out this pr and found the following error

How do we replicate your problem?

OS?

Cmake by natures takes different steps by setting compile flags based on what it finds.
What do you have installed in your build OS?

Do you have a log of the configure stage of cmake?

Did your run rg on the code for rpc.h?

def detect_nis(self):
if MS_WINDOWS or CYGWIN or HOST_PLATFORM == 'qnx6':
self.missing.append('nis')
return

    libs = []
    library_dirs = []
    includes_dirs = []

    # bpo-32521: glibc has deprecated Sun RPC for some time. Fedora 28
    # moved headers and libraries to libtirpc and libnsl. The headers
    # are in tircp and nsl sub directories.
    rpcsvc_inc = find_file(
        'rpcsvc/yp_prot.h', self.inc_dirs,
        [os.path.join(inc_dir, 'nsl') for inc_dir in self.inc_dirs]
    )
    rpc_inc = find_file(
        'rpc/rpc.h', self.inc_dirs,
        [os.path.join(inc_dir, 'tirpc') for inc_dir in self.inc_dirs]
    )

What did it find for NIS?