check for build requirements and abort build process if not satisied

- python>=3.9
- cmake>=3.22
- clang>=18 on windows use the msvc-clang (>=17)

fix microsoft#34

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14)  # for add_link_options and implicit target directories.
+cmake_minimum_required(VERSION 3.22)  # for add_link_options and implicit target directories.
 project("bitnet.cpp" C CXX)
 include(CheckIncludeFileCXX)
 

setup_env.py

@@ -173,7 +173,15 @@ def compile():
     # run_command(["cmake", "--build", "build", "--target", "llama-cli", "--config", "Release"])
     run_command(["cmake", "--build", "build", "--config", "Release"], log_step="compile")
 
+def check_python_version():
+    python_version = sys.version_info
+    if python_version < (3, 9):
+        logging.error("Python 3.9 or higher is required for Bitnet.cpp.")
+        sys.exit(1)
+    logging.info(f"Python version: {python_version.major}.{python_version.minor}.{python_version.micro}")
+
 def main():
+    check_python_version()
     setup_gguf()
     gen_code()
     compile()

src/CMakeLists.txt

@@ -4,7 +4,26 @@ set(GGML_SOURCES_BITNET ggml-bitnet-lut.cpp)
 
 include_directories(3rdparty/llama.cpp/ggml/include)
 
+if(CMAKE_VERSION VERSION_LESS "3.22")
+    message(FATAL_ERROR "CMake version 3.22 or higher is required for Bitnet.cpp compilation")
+endif()
+
 if ((NOT ${CMAKE_C_COMPILER_ID} MATCHES "Clang") OR
 (NOT ${CMAKE_CXX_COMPILER_ID} MATCHES "Clang"))
     message(FATAL_ERROR "Clang is required for Bitnet.cpp compilation")
+else()
+    # Check for minimum Clang version: 
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
+        # on Windows we use the Visual Studio Clang compiler (in 2022 it is version 17.)
+        message(STATUS "Visual Studio Clang compiler is being used.")
+        if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 17.0)
+            message(FATAL_ERROR "Visual Studio Clang version 17.0 or higher is required for Bitnet.cpp compilation")
+        endif()
+    else()
+        # on Linux Clang compiler >= 18.0 is required.
+        message(STATUS "Linux/Mac Clang compiler is being used.")
+        if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 18.0)
+            message(FATAL_ERROR "Clang version 18.0 or higher is required for Bitnet.cpp compilation")
+        endif()
+    endif()
 endif()