Initial cmake setup

Author: codingwithmagga

CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.25)
+
+project(cpuscope VERSION 0.1.0 LANGUAGES CXX)
+
+if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
+  message(FATAL_ERROR "In-source builds are not allowed. Please use a separate build directory.")
+endif()
+
+option(CI "Enable CI build mode and treat warnings as errors" OFF)
+option(ENABLE_MARCH_NATIVE "Enable -march=native optimization" OFF)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
+endif()
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang)$")
+  add_compile_options(-Wall -Wextra -Wpedantic)
+  if(CI)
+    add_compile_options(-Werror)
+  endif()
+  if(ENABLE_MARCH_NATIVE)
+    add_compile_options(-march=native)
+  endif()
+endif()
+
+if(NOT CMAKE_CXX_FLAGS MATCHES "-O[0-3s]")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
+endif()
+
+find_package(Threads REQUIRED)
+find_package(LLVM QUIET)
+
+add_subdirectory(src)
+add_subdirectory(tests)

src/CMakeLists.txt

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+add_library(cpuscope_lib STATIC
+  cpuscope_lib.cpp
+  cpuscope_lib.hpp
+)
+
+target_include_directories(cpuscope_lib PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+target_link_libraries(cpuscope_lib PUBLIC Threads::Threads)
+
+if(LLVM_FOUND)
+  message(STATUS "Optional LLVM integration enabled: ${LLVM_PACKAGE_VERSION}")
+  target_link_libraries(cpuscope_lib PUBLIC LLVM)
+else()
+  message(STATUS "LLVM not found; continuing without optional LLVM support.")
+endif()
+
+target_compile_features(cpuscope_lib PUBLIC cxx_std_20)
+
+add_executable(cpuscope_cli main.cpp)
+
+target_link_libraries(cpuscope_cli PRIVATE cpuscope_lib)
+
+set_target_properties(cpuscope_cli PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}
+)

src/cpuscope_lib.cpp

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+#include "cpuscope_lib.hpp"
+
+// Implementation is header-only for the initial placeholder functionality.

src/cpuscope_lib.hpp

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+#pragma once
+
+#include <format>
+#include <span>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace cpuscope {
+
+inline std::string format_message(std::span<const std::string_view> args)
+{
+    return std::format("CPUScope CLI placeholder: {} arguments received.", args.size());
+}
+
+} // namespace cpuscope

src/main.cpp

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+#include <iostream>
+#include <vector>
+#include <string_view>
+
+#include "cpuscope_lib.hpp"
+
+int main(int argc, char* argv[])
+{
+    std::vector<std::string_view> args;
+    args.reserve(argc);
+    for (int i = 0; i < argc; ++i) {
+        args.emplace_back(argv[i]);
+    }
+
+    std::cout << cpuscope::format_message(args) << '\n';
+    return 0;
+}

tests/CMakeLists.txt

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+add_executable(cpuscope_tests test_main.cpp)
+
+target_link_libraries(cpuscope_tests PRIVATE cpuscope_lib)
+
+set_target_properties(cpuscope_tests PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}
+)
+
+add_test(NAME cpuscope_tests COMMAND cpuscope_tests)

tests/test_main.cpp

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+int main()
+{
+    // Placeholder test target. GoogleTest integration will be added in a future issue.
+    return 0;
+}