Fix QNX build.

Note: this is not an officially supported target.
Contributed by Wen Yang.

src/lj_arch.h

@@ -93,6 +93,9 @@
 #elif defined(__CYGWIN__)
 #define LJ_TARGET_CYGWIN	1
 #define LUAJIT_OS	LUAJIT_OS_POSIX
+#elif defined(__QNX__)
+#define LJ_TARGET_QNX		1
+#define LUAJIT_OS	LUAJIT_OS_POSIX
 #else
 #define LUAJIT_OS	LUAJIT_OS_OTHER
 #endif

src/lj_prng.c

@@ -125,7 +125,7 @@ static PRGR libfunc_rgr;
 #if __MAC_OS_X_VERSION_MIN_REQUIRED >= 101200
 #define LJ_TARGET_HAS_GETENTROPY	1
 #endif
-#elif (LJ_TARGET_BSD && !defined(__NetBSD__)) || LJ_TARGET_SOLARIS || LJ_TARGET_CYGWIN
+#elif (LJ_TARGET_BSD && !defined(__NetBSD__)) || LJ_TARGET_SOLARIS || LJ_TARGET_CYGWIN || LJ_TARGET_QNX
 #define LJ_TARGET_HAS_GETENTROPY	1
 #endif
 

src/lj_profile.c

@@ -185,7 +185,11 @@ static void profile_timer_start(ProfileState *ps)
   tm.it_value.tv_sec = tm.it_interval.tv_sec = interval / 1000;
   tm.it_value.tv_usec = tm.it_interval.tv_usec = (interval % 1000) * 1000;
   setitimer(ITIMER_PROF, &tm, NULL);
+#if LJ_TARGET_QNX
+  sa.sa_flags = 0;
+#else
   sa.sa_flags = SA_RESTART;
+#endif
   sa.sa_handler = profile_signal;
   sigemptyset(&sa.sa_mask);
   sigaction(SIGPROF, &sa, &ps->oldsa);