build: init cmake build system for am

abstract-machine/CMakeLists.txt

@@ -0,0 +1,87 @@
+cmake_minimum_required(VERSION 3.22)
+
+project(abstract-machine)
+enable_language(CXX C ASM)
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 11)
+
+include(CMakeDependentOption)
+include(CMakePackageConfigHelpers)  # Used to find libcheck
+include(CTest)
+
+# -- General options
+set(ISA CACHE STRING "Target ISA")
+set_property(CACHE ISA PROPERTY STRINGS "riscv" "x86" "x86_64" "native")
+string(TOUPPER ${ISA} ISA_UPPER)
+
+cmake_dependent_option(
+    __PLATFORM_NEMU__ "Run on NEMU"
+    ON "ISA MATCHES \"(riscv | x86)\"" OFF)
+cmake_dependent_option(
+    __PLATFORM_NATIVE__ "Run on native"
+    ON "ISA MATCHES native" OFF)
+
+# -- Set PLATFORM according to options
+set(MATCH_PLATFORM_PATTERN "^__PLATFORM_([A-Z]*)__")
+get_cmake_property(CACHE_VARS CACHE_VARIABLES)
+
+message(STATUS "ISA: ${ISA}")
+foreach(VAR IN LISTS CACHE_VARS)
+    if(VAR MATCHES ${MATCH_PLATFORM_PATTERN})
+        # Retrieve the value of the cache variable
+        get_property(VAR_VALUE CACHE ${VAR} PROPERTY VALUE)
+        set(PLATFORM_UPPER ${CMAKE_MATCH_1})
+        string(TOLOWER ${PLATFORM_UPPER} PLATFORM)
+        message(STATUS "Variable: ${VAR}=${VAR_VALUE}, Platform: ${PLATFORM}")
+    endif()
+endforeach()
+
+if(${PLATFORM} MATCHES "native")
+set(ARCH "native")
+else()
+set(ARCH ${ISA}-${PLATFORM})
+endif()
+string(TOUPPER ${ARCH} ARCH_UPPER)
+
+# -- Target specific options
+cmake_dependent_option(
+    NATIVE_USE_KLIB "Use Klib even if on native"
+    ON "NOT __ISA_NATIVE__" OFF)
+
+# -- Add compile definitions based on options
+add_compile_definitions(
+    $<MAKE_C_IDENTIFIER:__ARCH_${ARCH_UPPER}__>
+    __ISA_${ISA_UPPER}__
+    __PLATFORM_${PLATFORM_UPPER}__
+)
+
+add_compile_definitions(
+    $<$<BOOL:${NATIVE_USE_KLIB}>:__NATIVE_USE_KLIB__>
+)
+
+# -- Required compiler flags
+add_compile_options(
+    # -Werror
+    -Wno-main
+    -fno-asynchronous-unwind-tables
+    -fno-builtin
+    -fno-stack-protector
+    -U_FORTIFY_SOURCE
+    $<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>
+    $<$<COMPILE_LANGUAGE:CXX>:-ffreestanding>
+    $<$<COMPILE_LANGUAGE:CXX>:-fno-rtti>)
+
+add_link_options(
+    -znoexecstack
+)
+
+# -- Include linker script here. Use this linker script at link time if INCLUDE_LINKER_SCRIPT is set to true
+set(LINKER_SCRIPT linker.ld)
+
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
+
+add_compile_options(-march=rv32if -mabi=ilp32)
+add_link_options(-march=rv32if -mabi=ilp32)
+
+add_subdirectory(klib)
+add_subdirectory(am)