Remove fake signal-handling code

Microsoft Windows has only limited support for signals.  busybox-w32
initially papered over this fact by adding definitions for unsupported
signals and signal-handling functions.

Remove this fake code and deal with the consequences by excluding
anything that fails to compile as a result.

2 files changed, 18 insertions, 28 deletions

diff --git a/include/libbb.h b/include/libbb.h
index 761370111..4a59ee7d8 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -526,18 +526,36 @@ enum {
          * Dance around with long long to guard against that...
          */
         BB_FATAL_SIGS = (int)(0
+#ifdef SIGHUP
                 + (1LL << SIGHUP)
+#endif
                 + (1LL << SIGINT)
                 + (1LL << SIGTERM)
+#ifdef SIGPIPE
                 + (1LL << SIGPIPE)   // Write to pipe with no readers
+#endif
+#ifdef SIGQUIT
                 + (1LL << SIGQUIT)   // Quit from keyboard
+#endif
                 + (1LL << SIGABRT)   // Abort signal from abort(3)
+#ifdef SIGALRM
                 + (1LL << SIGALRM)   // Timer signal from alarm(2)
+#endif
+#ifdef SIGVTALRM
                 + (1LL << SIGVTALRM) // Virtual alarm clock
+#endif
+#ifdef SIGXCPU
                 + (1LL << SIGXCPU)   // CPU time limit exceeded
+#endif
+#ifdef SIGXFSZ
                 + (1LL << SIGXFSZ)   // File size limit exceeded
+#endif
+#ifdef SIGUSR1
                 + (1LL << SIGUSR1)   // Yes kids, these are also fatal!
+#endif
+#ifdef SIGUSR1
                 + (1LL << SIGUSR2)
+#endif
                 + 0),
 };
 #if !ENABLE_PLATFORM_MINGW32
diff --git a/include/mingw.h b/include/mingw.h
index c662f4baf..1bb2032cd 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -90,39 +90,11 @@ IMPL(getpwent,struct passwd *,NULL,void)
 /*
  * signal.h
  */
-#define SIGHUP 1
-#define SIGQUIT 3
 #define SIGKILL 9
-#define SIGUSR1 10
-#define SIGUSR2 12
-#define SIGPIPE 13
-#define SIGALRM 14
-#define SIGCHLD 17
-#define SIGCONT 18
-#define SIGSTOP 19
-#define SIGTSTP 20
-#define SIGTTIN 21
-#define SIGTTOU 22
-#define SIGXCPU 24
-#define SIGXFSZ 25
-#define SIGVTALRM 26
-#define SIGWINCH 28
 
 #define SIG_UNBLOCK 1
 
-typedef void (__cdecl *sighandler_t)(int);
-struct sigaction {
-        sighandler_t sa_handler;
-        unsigned sa_flags;
-        int sa_mask;
-};
-#define sigemptyset(x) (void)0
-#define SA_RESTART 0
-
-NOIMPL(sigaction,int sig UNUSED_PARAM, struct sigaction *in UNUSED_PARAM, struct sigaction *out UNUSED_PARAM);
-NOIMPL(sigfillset,int *mask UNUSED_PARAM);
 NOIMPL(FAST_FUNC sigprocmask_allsigs, int how UNUSED_PARAM);
-NOIMPL(FAST_FUNC sigaction_set,int signo UNUSED_PARAM, const struct sigaction *sa UNUSED_PARAM);
 
 /*
  * stdio.h