check-code: block non-portable pipe-and

test-shelve: do not use non-portable pipe-and

parsers: suppress warning of signed and unsigned comparison at nt_init Spotted by CC=clang CFLAGS='-Wall -Wextra -Wno-missing-field-initializers -Wno-unused-parameter -Wshorten-64-to-32': mercurial/parsers.c:1580:24: warning: comparison of integers of different signs: 'Py_ssize_t' (aka 'long') and 'unsigned long' [-Wsign-compare] if (self->raw_length > INT_MAX / sizeof(nodetree)) {