unistd: Avoid #define replacements in C++ mode.

[pspp] / ChangeLog

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 2010-03-07  Bruno Haible  <bruno@clisp.org>
 
+       unistd: Avoid #define replacements in C++ mode.
+       * lib/unistd.in.h: Include c++defs.h.
+       (chown, close, dup, dup2, dup3, euidaccess, faccessat, fchdir,
+       fchownat, fsync, ftruncate, getcwd, getdomainname, getdtablesize,
+       getgroups, gethostname, getlogin, getlogin_r, getpagesize,
+       getusershell, setusershell, endusershell, lchown, link, linkat, lseek,
+       pipe2, pread, readlink, readlinkat, rmdir, sleep, symlink, symlinkat,
+       unlink, unlinkat, usleep, write): In C++, define a namespaced alias
+       symbol.
+       (environ): Update.
+       * modules/unistd (Depends-on): Add c++defs.
+       (Makefile.am): Update unistd.h rule.
+
        time: Avoid #define replacements in C++ mode.
        * lib/time.in.h: Include c++defs.h, warn-on-use.h.
        (nanosleep, mktime, localtime_r, gmtime_r, strptime, timegm): In C++,