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

[pspp] / ChangeLog

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 2010-03-07  Bruno Haible  <bruno@clisp.org>
 
+       signal: Avoid #define replacements in C++ mode.
+       * lib/signal.in.h: Include c++defs.h.
+       (sigismember, sigemptyset, sigaddset, sigdelset, sigfillset,
+       sigpending, sigprocmask, signal, raise, sigaction): In C++, define a
+       namespaced alias symbol.
+       * modules/signal (Depends-on): Add c++defs.
+       (Makefile.am): Update signal.h rule.
+
        search: Avoid #define replacements in C++ mode.
        * lib/search.in.h: Include c++defs.h.
        (_gl_search_compar_fn, _gl_search_action_fn): New types.