On Solaris (s10/nitrogen):


% find /usr/include -type f | xargs fgrep -ni AT_FDCWD
/usr/include/sys/fcntl.h:320:#define    AT_FDCWD                        0xffd19553

(AIX uses -2, FreeBSD uses -100.)

Anyway, that results in:


(cpython@nitrogen:ttypts/10) (Tue/15:34) ..                                                                                                         (~/hg/3.x.trent/build/release)
% touch ../../src/Modules/posixmodule.c 
(cpython@nitrogen:ttypts/10) (Tue/15:34) ..                                                                                                         (~/hg/3.x.trent/build/release)
% time /usr/ccs/bin/make 
/opt/solarisstudio12.3/bin/cc  -DNDEBUG -v -m64 -mt=yes -xbuiltin -xhwcprof -xF -xarch=native -xchip=native -fast -fma=fused -g -xO4 -library=sunperf   -I. -I../../src/Include -IInclude   -DPy_BUILD_CORE  -c ../../src/Modules/posixmodule.c -o Modules/posixmodule.o
"../../src/Modules/posixmodule.c", line 2307: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 2337: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 2386: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 2626: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 2966: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 3198: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 3199: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 3845: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 3989: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 3990: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 4111: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 4267: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 4587: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 7007: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 7092: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 7510: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 8260: warning: initializer does not fit or is out of range: 0xffd19553
"../../src/Modules/posixmodule.c", line 8322: warning: initializer does not fit or is out of range: 0xffd19553
^C
*** Modules/posixmodule.o removed.
/usr/ccs/bin/make  2.79s user 0.28s system 46% cpu 6.598 total

In every case, the affected line is:

    int dir_fd = DEFAULT_DIR_FD;

(DEFAULT_DIR_FD defaults to AT_FDCWD if it's defined.)

Note that Solaris 10 64-bit is LP64, ints are still 32-bit.