diff --git a/compiler/llvm/CMakeLists.txt b/compiler/llvm/CMakeLists.txt
index 918462c43..af6b5dd41 100755
--- a/compiler/llvm/CMakeLists.txt
+++ b/compiler/llvm/CMakeLists.txt
@@ -45,7 +45,7 @@ endif()
 set(C_CXX_FLAGS "${C_CXX_FLAGS} -fvisibility=hidden -fdata-sections -ffunction-sections")
 
 ExternalProject_Add(extclang 
-  GIT_REPOSITORY git://github.com/mobivm/clang.git
+  GIT_REPOSITORY https://github.com/mobivm/clang.git
   GIT_TAG 7b389564897bc6c0431c42f8f1825f04624ff4e3
   UPDATE_COMMAND ""
   CONFIGURE_COMMAND "" 
@@ -59,7 +59,7 @@ set(LLVM_C_FLAGS "${C_CXX_FLAGS} -fvisibility=hidden -fdata-sections -ffunction-
 set(LLVM_CXX_FLAGS "${C_CXX_FLAGS} -fvisibility=hidden -fdata-sections -ffunction-sections")
 ExternalProject_Add(extllvm
   DEPENDS extclang
-  GIT_REPOSITORY git://github.com/mobivm/llvm.git
+  GIT_REPOSITORY https://github.com/mobivm/llvm.git
   GIT_TAG aceb47b80838681fe65a1d01aac7aae7b863ac5a
   PATCH_COMMAND bash -c "rm -rf tools/clang && ln -s ../../../../extclang-prefix/src/extclang tools/clang && ${CMAKE_SOURCE_DIR}/patches/apply-patches"
   LIST_SEPARATOR ^^
diff --git a/compiler/vm/CMakeLists.txt b/compiler/vm/CMakeLists.txt
index e4904b1e3..b980a18ea 100755
--- a/compiler/vm/CMakeLists.txt
+++ b/compiler/vm/CMakeLists.txt
@@ -260,6 +260,8 @@ else()
 endif()
 
 set(EXTGC_C_FLAGS "${C_CXX_FLAGS} -DGC_DISABLE_INCREMENTAL -DGC_DISCOVER_TASK_THREADS -DGC_FORCE_UNMAP_ON_GCOLLECT -DMARK_DESCR_OFFSET=${EXTGC_MARK_DESCR_OFFSET}")
+# disable errors on clang clang-1500.3.9.4
+set(EXTGC_C_FLAGS "${EXTGC_C_FLAGS} -Wno-error=incompatible-function-pointer-types -Wno-error=int-conversion")
 set(EXTGC_LD_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
 if(DARWIN)
   set(EXTGC_C_FLAGS "${EXTGC_C_FLAGS} -DNO_DYLD_BIND_FULLY_IMAGE --sysroot=${SYSROOT}")
diff --git a/compiler/vm/rt/robovm/CMakeLists.txt b/compiler/vm/rt/robovm/CMakeLists.txt
index ef939a03c..428dc29b1 100755
--- a/compiler/vm/rt/robovm/CMakeLists.txt
+++ b/compiler/vm/rt/robovm/CMakeLists.txt
@@ -37,6 +37,8 @@ if(DARWIN)
   if(IOS)
     set(OBJC_FLAGS "${OBJC_FLAGS} -fobjc-abi-version=2")
   endif()
+  # disable errors on clang clang-1500.3.9.4
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-error=incompatible-function-pointer-types -Wno-error=int-conversion")
   # disable XCode14 objc-msgsend stubs to allow this lib to be linked with XCode13 and bellow
   set(OBJC_FLAGS "${OBJC_FLAGS} -fno-objc-msgsend-selector-stubs")
   set_property(SOURCE ${OBJC_SRC} PROPERTY LANGUAGE C)