Merge 0050677248 into 17be90d8f0

- Apply global warnings in warnings.cmake instead of maintaining them in
  separate files.
- Enable errors during CI when building iwasm and wamrc.
- Since GCC and Clang are the default compilers on Ubuntu and macOS, enabling
  `-Werror` on both platforms can be treated as checking with different
  compilers.

build-scripts/warnings.cmake

@@ -7,29 +7,22 @@ if (MSVC)
   add_compile_options(/W4)
 else ()
   # refer to https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
-  add_compile_options(-Wall -Wextra -Wformat -Wformat-security -Wshadow)
+  add_compile_options(
+    -Wall -Wextra -Wformat -Wformat-security
+     $<$<COMPILE_LANGUAGE:C>:-Wshadow>
+  )
   # -pedantic causes warnings like "ISO C forbids initialization between function pointer and ‘void *’" which
   #   is widely used in the codebase.
   #
   # -fpermissive causes warnings like "-fpermissive is valid for C++/ObjC++ but not for C"
   #
-  # _Static_assert and _Alignof requires c11 or later
-  #
-  #
   add_compile_options (
-    -Wimplicit-function-declaration
-    -Wincompatible-pointer-types
+    $<$<COMPILE_LANGUAGE:C>:-Wincompatible-pointer-types>
+    $<$<COMPILE_LANGUAGE:C>:-Wimplicit-function-declaration>
   )
   # waivers
   add_compile_options (
     -Wno-unused
     -Wno-unused-parameter
   )
-
-  if (WAMR_BUILD_JIT EQUAL 1)
-    # Friendly fire on LLVM libraries.
-    add_compile_options (
-      -Wno-error=shadow
-    )
-  endif ()
 endif ()