feat(CMakeLists): Add MSVC warning flags for ggml modules

Add MSVC warning flags to improve code quality and catch potential issues
early. The following flags have been added:
- /W4: Comprehensive warnings (similar to -Wall and some of -Wextra)
- /we4456: Declaration hides previous local declaration
- /we4457: Declaration hides function parameter
- /we4458: Declaration hides class member
- /wd4100: Unreferenced formal parameter (too noisy)
- /wd4324: Structure was padded due to alignment specifier

Author: scc-tw

ggml/src/CMakeLists.txt

@@ -75,9 +75,17 @@ if (GGML_ALL_WARNINGS)
         add_compile_options("$<$<COMPILE_LANGUAGE:C>:${C_FLAGS};${GF_C_FLAGS}>"
                             "$<$<COMPILE_LANGUAGE:CXX>:${CXX_FLAGS};${GF_CXX_FLAGS}>")
     else()
-        # todo : msvc
-        set(C_FLAGS   "")
-        set(CXX_FLAGS "")
+        # MSVC
+        list(APPEND MSVC_WARNING_FLAGS 
+            /W4       # Comprehensive warnings (similar to -Wall and some of -Wextra)
+            /we4456   # declaration hides previous local declaration
+            /we4457   # declaration hides function parameter
+            /we4458   # declaration hides class member
+            /wd4100   # unreferenced formal parameter (too noisy)
+            /wd4324   # structure was padded due to alignment specifier
+        )
+
+        add_compile_options(${MSVC_WARNING_FLAGS})
     endif()
 endif()