arch/sim/cmake: remove the host specific -U when HOSTSRCS

fix macos compile hostfs.c compile issue.
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.0.sdk/usr/include/_string.h:131:62: error: expected function body after function declarator
  131 | char    *stpncpy(char *__dst, const char *__src, size_t __n) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);
      |                                                              ^

Signed-off-by: buxiasen <buxiasen@gmail.com>

arch/sim/src/cmake/Toolchain.cmake

@@ -38,16 +38,19 @@ endif()
 # macOS is built with __APPLE__. We #undef predefined macros for those possible
 # host OSes here because the OS APIs this library should use are of NuttX, not
 # the host OS.
-add_compile_options(
-  -U_AIX
-  -U_WIN32
-  -U__APPLE__
-  -U__FreeBSD__
-  -U__NetBSD__
-  -U__linux__
-  -U__sun__
-  -U__unix__
-  -U__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
+
+set(SIM_NO_HOST_OPTIONS
+    -U_AIX
+    -U_WIN32
+    -U__APPLE__
+    -U__FreeBSD__
+    -U__NetBSD__
+    -U__linux__
+    -U__sun__
+    -U__unix__
+    -U__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
+
+add_compile_options(${SIM_NO_HOST_OPTIONS})
 
 set(NO_LTO "-fno-lto")
 

arch/sim/src/sim/CMakeLists.txt

@@ -288,4 +288,11 @@ endforeach()
 set(HOSTSRCS ${WINHOSTSRCS})
 
 target_sources(nuttx PRIVATE ${HOSTSRCS})
+
+get_target_property(HOST_COMPILE_OPTIONS nuttx COMPILE_OPTIONS)
+foreach(remove_item IN LISTS SIM_NO_HOST_OPTIONS)
+  list(REMOVE_ITEM HOST_COMPILE_OPTIONS ${remove_item})
+endforeach()
+set_target_properties(nuttx PROPERTIES COMPILE_OPTIONS
+                                       "${HOST_COMPILE_OPTIONS}")
 target_compile_definitions(nuttx PRIVATE ${HOST_DEFINITIONS})