Use LLVM_ROOT_DIR again, add .clang-{format,tidy}

.clang-format

@@ -0,0 +1,29 @@
+---
+BasedOnStyle: LLVM
+ColumnLimit: 120
+UseTab: Never
+TabWidth: 2
+---
+Language: Cpp
+DerivePointerAlignment: false
+PointerAlignment: Left
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: false
+IndentCaseLabels: false
+AllowShortBlocksOnASingleLine: Always
+AlignOperands: true
+AlignTrailingComments: true
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: Yes
+BreakConstructorInitializersBeforeComma: true
+AlwaysBreakAfterReturnType: None
+AlwaysBreakAfterDefinitionReturnType: None
+AllowShortFunctionsOnASingleLine: All
+Cpp11BracedListStyle: true
+NamespaceIndentation: None
+BinPackArguments: true
+BinPackParameters: true
+SortIncludes: false
+AccessModifierOffset: -2
+ConstructorInitializerIndentWidth: 0
+ConstructorInitializerAllOnOneLineOrOnePerLine: true

.clang-tidy

@@ -0,0 +1 @@
+Checks: '*,-misc-unused-parameters,-modernize-use-trailing-return-type,-readability-named-parameter,-readability-convert-member-functions-to-static,-readability-uppercase-literal-suffix,-readability-magic-numbers,-hicpp-uppercase-literal-suffix,-hicpp-signed-bitwise,-cppcoreguidelines-avoid-magic-numbers,-cppcoreguidelines-pro-type-static-cast-downcast,-cppcoreguidelines-pro-bounds-constant-array-index,-cppcoreguidelines-owning-memory,-cppcoreguidelines-pro-type-union-access,-cppcoreguidelines-pro-bounds-pointer-arithmetic,-cppcoreguidelines-non-private-member-variables-in-classes,-fuchsia-*,-google-runtime-references,-llvmlibc-*'

.github/workflows/test.yml

@@ -104,7 +104,7 @@ jobs:
       - name: Configure CMake
         run: |
           cmake -B build -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" \
-            -DClang_DIR=/opt/local/libexec/llvm-11/lib/cmake/clang \
+            -DLLVM_ROOT_DIR=/opt/local/libexec/llvm-11 \
             -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache .
 
       - name: Build
@@ -149,9 +149,6 @@ jobs:
       - name: Enable Visual Studio environment
         uses: ilammy/msvc-dev-cmd@v1
 
-      - name: Create build directory
-        run: cmake -E make_directory ${{github.workspace}}/build
-
       - name: Configure CMake
         run: |
           $workspace = $env:RUNNER_WORKSPACE -replace '\\', '/'

CMakeLists.txt

@@ -1,11 +1,6 @@
 cmake_minimum_required(VERSION 3.10 FATAL_ERROR) # because of c++17
 # Set MSVC runtime library flags from CMAKE_MSVC_RUNTIME_LIBRARY
 cmake_policy(SET CMP0091 NEW)
-project(athena)
-if (NOT MSVC)
-  set(CMAKE_CXX_STANDARD 20)
-  set(CMAKE_CXX_STANDARD_REQUIRED ON)
-endif()
 
 ##################
 # Athena Version #
@@ -17,6 +12,75 @@ set(ATHENA_PATCH_VERSION 0)
 set(ATHENA_VERSION
     ${ATHENA_MAJOR_VERSION}.${ATHENA_MINOR_VERSION}.${ATHENA_PATCH_VERSION})
 
+project(athena VERSION ${ATHENA_VERSION} LANGUAGES C CXX)
+
+if (MSVC)
+  # Shaddup MSVC
+  add_compile_definitions(UNICODE=1 _UNICODE=1 __SSE__=1
+      _CRT_SECURE_NO_WARNINGS=1 D_SCL_SECURE_NO_WARNINGS=1
+      _SCL_SECURE_NO_DEPRECATE=1 _CRT_NONSTDC_NO_WARNINGS=1
+      _ENABLE_EXTENDED_ALIGNED_STORAGE=1 NOMINMAX=1)
+  add_compile_options(/IGNORE:4221
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4018>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4800>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4005>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4311>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4068>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4267>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4244>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4200>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4305>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4067>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4146>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4309>
+      $<$<OR:$<COMPILE_LANGUAGE:C>,$<COMPILE_LANGUAGE:CXX>>:/wd4805>
+      ${VS_OPTIONS})
+
+  string(REPLACE "/GR " "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  string(REPLACE " /EHsc" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+  add_compile_options(
+      # Disable exceptions
+      $<$<COMPILE_LANGUAGE:CXX>:/EHsc->
+
+      # Disable RTTI
+      $<$<COMPILE_LANGUAGE:CXX>:/GR->
+
+      # Enforce various standards compliant behavior.
+      $<$<COMPILE_LANGUAGE:CXX>:/permissive->
+
+      # Enable standard volatile semantics.
+      $<$<COMPILE_LANGUAGE:CXX>:/volatile:iso>
+
+      # Reports the proper value for the __cplusplus preprocessor macro.
+      $<$<COMPILE_LANGUAGE:CXX>:/Zc:__cplusplus>
+
+      # Use latest C++ standard.
+      $<$<COMPILE_LANGUAGE:CXX>:/std:c++latest>
+  )
+
+  if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+    # Flags for MSVC (not clang-cl)
+    add_compile_options(
+        # Allow constexpr variables to have explicit external linkage.
+        $<$<COMPILE_LANGUAGE:CXX>:/Zc:externConstexpr>
+
+        # Assume that new throws exceptions, allowing better code generation.
+        $<$<COMPILE_LANGUAGE:CXX>:/Zc:throwingNew>
+
+        # Link-time Code Generation for Release builds
+        $<$<CONFIG:Release>:/GL>
+    )
+
+    # Link-time Code Generation for Release builds
+    set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "/LTCG")
+    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "/RELEASE /LTCG /OPT:REF /OPT:ICF /INCREMENTAL:NO")
+    set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "/DEBUG /RELEASE /OPT:REF /OPT:ICF /INCREMENTAL:NO /DEBUGTYPE:cv,fixup")
+  endif ()
+else ()
+  set(CMAKE_CXX_STANDARD 20)
+  set(CMAKE_CXX_STANDARD_REQUIRED ON)
+endif ()
+
 ################
 # Athena Build #
 ################