MacOS builds: for cross compiling make sure that getversion is compil…

…ed for the

hostm not the target, as it must run on the host.  Eliminate an unnecessary
error report in sqUnixSpurMemory.c when launching on Apple Silicon with MAP_JIT.
[ci skip]

build.macos32x86/common/Makefile.vm

@@ -152,8 +152,9 @@ include ../common/Makefile.rules
 svnver:
 	@-echo $(SVNREV)
 
+# N.B. getversion is *not* cross compiled; it must run here and now
 getversion: $(OSXCOMMONDIR)/version.c deps/version.d $(CROSSDIR)/sqSCCSVersion.h
-	$(CC) -x c -DVERSION_PROGRAM=1 $(ALLFLAGS) $(INCLUDES) $< -o $@
+	$(CC) -x c -DVERSION_PROGRAM=1 $(INCLUDES) $< -o $@
 	$(POSTCOMPILE)
 
 -include deps/version.d

build.macos64ARMv8/common/Makefile.vm

@@ -155,8 +155,9 @@ include ../common/Makefile.rules
 svnver:
 	@-echo $(SVNREV)
 
+# N.B. getversion is *not* cross compiled; it must run here and now
 getversion: $(OSXCOMMONDIR)/version.c deps/version.d $(CROSSDIR)/sqSCCSVersion.h
-	$(CC) -x c -DVERSION_PROGRAM=1 $(ALLFLAGS) $(INCLUDES) $< -o $@
+	$(CC) -x c -DVERSION_PROGRAM=1 $(INCLUDES) $< -o $@
 	$(POSTCOMPILE)
 
 -include deps/version.d

build.macos64x64/common/Makefile.vm

@@ -155,8 +155,9 @@ include ../common/Makefile.rules
 svnver:
 	@-echo $(SVNREV)
 
+# N.B. getversion is *not* cross compiled; it must run here and now
 getversion: $(OSXCOMMONDIR)/version.c deps/version.d $(CROSSDIR)/sqSCCSVersion.h
-	$(CC) -x c -DVERSION_PROGRAM=1 $(ALLFLAGS) $(INCLUDES) $< -o $@
+	$(CC) -x c -DVERSION_PROGRAM=1 $(INCLUDES) $< -o $@
 	$(POSTCOMPILE)
 
 -include deps/version.d

platforms/unix/vm/sqUnixSpurMemory.c

@@ -201,7 +201,7 @@ sqDeallocateMemorySegmentAtOfSize(void *addr, sqInt sz)
  * To cope with modern OSs that disallow executing code in writable memory we
  * dual-map the code zone, one mapping with read/write permissions and the other
  * with read/execute permissions. In such a configuration the code zone has
- * already been alloated and is not included in (what is no longer) the initial
+ * already been allocated and is not included in (what is no longer) the initial
  * alloc.
  */
 static void
@@ -254,6 +254,10 @@ sqMakeMemoryExecutableFromToCodeToDataDelta(usqInt startAddr,
 				 PROT_READ | PROT_EXEC) < 0)
 		perror("mprotect(x,y,PROT_READ | PROT_EXEC)");
 
+#  else if defined(MAP_JIT)
+
+	assert(!codeToDataDelta);
+
 #  else /* DUAL_MAPPED_CODE_ZONE */
 
 	if (mprotect((void *)firstPage,
@@ -283,7 +287,11 @@ allocateJITMemory(usqInt *desiredSize)
 
 	*desiredSize = roundUpToPage(*desiredSize);
 	result =   mmap(hint, *desiredSize,
+#if DUAL_MAPPED_CODE_ZONE
+					PROT_READ | PROT_EXEC,
+#else
 					PROT_READ | PROT_WRITE | PROT_EXEC,
+#endif
 					MAP_FLAGS | MAP_JIT, -1, 0);
 	if (result == MAP_FAILED) {
 		perror("Could not allocate JIT memory");