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Diffstat (limited to 'SConstruct')
| -rw-r--r-- | SConstruct | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/SConstruct b/SConstruct new file mode 100644 index 0000000..423994d --- /dev/null +++ b/SConstruct @@ -0,0 +1,277 @@ +#!/usr/bin/env python + +# This file is heavily based on https://github.com/godotengine/godot-cpp/blob/8155f35b29b4b08bc54b2eb0c57e1e9effe9f093/SConstruct +import os +import platform +import sys +import subprocess +from glob import glob +from pathlib import Path + +import SCons + +# Local +from scripts.build.option_handler import OptionsClass +from scripts.build.glob_recursive import GlobRecursive +from scripts.build.cache import show_progress + +# Try to detect the host platform automatically. +# This is used if no `platform` argument is passed +if sys.platform.startswith("linux"): + default_platform = "linux" +elif sys.platform == "darwin": + default_platform = "macos" +elif sys.platform == "win32" or sys.platform == "msys": + default_platform = "windows" +elif ARGUMENTS.get("platform", ""): + default_platform = ARGUMENTS.get("platform") +else: + raise ValueError("Could not detect platform automatically, please specify with platform=<platform>") + +is_standalone = SCons.Script.sconscript_reading == 1 + +try: + Import("env") + old_env = env + env = old_env.Clone() +except: + # Default tools with no platform defaults to gnu toolchain. + # We apply platform specific toolchains via our custom tools. + env = Environment(tools=["default"], PLATFORM="") + old_env = env + +env.PrependENVPath("PATH", os.getenv("PATH")) + +# Default num_jobs to local cpu count if not user specified. +# SCons has a peculiarity where user-specified options won't be overridden +# by SetOption, so we can rely on this to know if we should use our default. +initial_num_jobs = env.GetOption("num_jobs") +altered_num_jobs = initial_num_jobs + 1 +env.SetOption("num_jobs", altered_num_jobs) +if env.GetOption("num_jobs") == altered_num_jobs: + cpu_count = os.cpu_count() + if cpu_count is None: + print("Couldn't auto-detect CPU count to configure build parallelism. Specify it with the -j argument.") + else: + safer_cpu_count = cpu_count if cpu_count <= 4 else cpu_count - 1 + print( + "Auto-detected %d CPU cores available for build parallelism. Using %d cores by default. You can override it with the -j argument." + % (cpu_count, safer_cpu_count) + ) + env.SetOption("num_jobs", safer_cpu_count) + +opts = OptionsClass(ARGUMENTS) + +platforms = ("linux", "macos", "windows", "android", "ios", "javascript") +unsupported_known_platforms = ("android", "ios", "javascript") +opts.Add( + EnumVariable( + key="platform", + help="Target platform", + default=env.get("platform", default_platform), + allowed_values=platforms, + ignorecase=2, + ) +) + +opts.Add( + EnumVariable( + key="target", + help="Compilation target", + default=env.get("target", "template_debug"), + allowed_values=("editor", "template_release", "template_debug"), + ) +) + +opts.Add(BoolVariable(key="build_ovdl_library", help="Build the openvic dataloader library.", default=env.get("build_ovdl_library", not is_standalone))) +opts.Add( + EnumVariable( + key="precision", + help="Set the floating-point precision level", + default=env.get("precision", "single"), + allowed_values=("single", "double"), + ) +) + +# Add platform options +tools = {} +for pl in set(platforms) - set(unsupported_known_platforms): + tool = Tool(pl, toolpath=["tools"]) + if hasattr(tool, "options"): + tool.options(opts) + tools[pl] = tool + +# CPU architecture options. +architecture_array = ["", "universal", "x86_32", "x86_64", "arm32", "arm64", "rv64", "ppc32", "ppc64", "wasm32"] +architecture_aliases = { + "x64": "x86_64", + "amd64": "x86_64", + "armv7": "arm32", + "armv8": "arm64", + "arm64v8": "arm64", + "aarch64": "arm64", + "rv": "rv64", + "riscv": "rv64", + "riscv64": "rv64", + "ppcle": "ppc32", + "ppc": "ppc32", + "ppc64le": "ppc64", +} +opts.Add( + EnumVariable( + key="arch", + help="CPU architecture", + default=env.get("arch", ""), + allowed_values=architecture_array, + map=architecture_aliases, + ) +) + +opts.Add(BoolVariable("build_ovdl_headless", "Build the openvic dataloader headless executable", is_standalone)) + +opts.Add(BoolVariable("compiledb", "Generate compilation DB (`compile_commands.json`) for external tools", False)) +opts.Add(BoolVariable("verbose", "Enable verbose output for the compilation", False)) +opts.Add(BoolVariable("intermediate_delete", "Enables automatically deleting unassociated intermediate binary files.", True)) +opts.Add(BoolVariable("progress", "Show a progress indicator during compilation", True)) + +# Targets flags tool (optimizations, debug symbols) +target_tool = Tool("targets", toolpath=["tools"]) +target_tool.options(opts) + +# Custom options and profile flags. +opts.Make(["custom.py"]) +opts.Finalize(env) +Help(opts.GenerateHelpText(env)) + +if env["platform"] in unsupported_known_platforms: + print("Unsupported platform: " + env["platform"]+". Only supports " + ", ".join(set(platforms) - set(unsupported_known_platforms))) + Exit() + +# Process CPU architecture argument. +if env["arch"] == "": + # No architecture specified. Default to arm64 if building for Android, + # universal if building for macOS or iOS, wasm32 if building for web, + # otherwise default to the host architecture. + if env["platform"] in ["macos", "ios"]: + env["arch"] = "universal" + elif env["platform"] == "android": + env["arch"] = "arm64" + elif env["platform"] == "javascript": + env["arch"] = "wasm32" + else: + host_machine = platform.machine().lower() + if host_machine in architecture_array: + env["arch"] = host_machine + elif host_machine in architecture_aliases.keys(): + env["arch"] = architecture_aliases[host_machine] + elif "86" in host_machine: + # Catches x86, i386, i486, i586, i686, etc. + env["arch"] = "x86_32" + else: + print("Unsupported CPU architecture: " + host_machine) + Exit() + +tool = Tool(env["platform"], toolpath=["tools"]) + +if tool is None or not tool.exists(env): + raise ValueError("Required toolchain not found for platform " + env["platform"]) + +tool.generate(env) +target_tool.generate(env) + +print("Building for architecture " + env["arch"] + " on platform " + env["platform"]) + +# Require C++20 +if env.get("is_msvc", False): + env.Append(CXXFLAGS=["/std:c++20"]) +else: + env.Append(CXXFLAGS=["-std=c++20"]) + +if env["precision"] == "double": + env.Append(CPPDEFINES=["REAL_T_IS_DOUBLE"]) + +scons_cache_path = os.environ.get("SCONS_CACHE") +if scons_cache_path != None: + CacheDir(scons_cache_path) + print("Scons cache enabled... (path: '" + scons_cache_path + "')") + +if env["compiledb"]: + # Generating the compilation DB (`compile_commands.json`) requires SCons 4.0.0 or later. + from SCons import __version__ as scons_raw_version + + scons_ver = env._get_major_minor_revision(scons_raw_version) + + if scons_ver < (4, 0, 0): + print("The `compiledb=yes` option requires SCons 4.0 or later, but your version is %s." % scons_raw_version) + Exit(255) + + env.Tool("compilation_db") + env.Alias("compiledb", env.CompilationDatabase()) + +Export("env") +env.GlobRecursive = GlobRecursive + +SConscript("deps/SCsub") + +# For the reference: +# - CCFLAGS are compilation flags shared between C and C++ +# - CFLAGS are for C-specific compilation flags +# - CXXFLAGS are for C++-specific compilation flags +# - CPPFLAGS are for pre-processor flags +# - CPPDEFINES are for pre-processor defines +# - LINKFLAGS are for linking flags + +# tweak this if you want to use different folders, or more folders, to store your source code in. +paths = ["include", "src/openvic-dataloader"] +env.Append(CPPPATH=[[env.Dir(p) for p in paths]]) +sources = GlobRecursive("*.cpp", paths) +env.dataloader_sources = sources + +suffix = ".{}.{}".format(env["platform"], env["target"]) +if env.dev_build: + suffix += ".dev" +if env["precision"] == "double": + suffix += ".double" +suffix += "." + env["arch"] + +# Expose it when included from another project +env["suffix"] = suffix + +library = None +env["OBJSUFFIX"] = suffix + env["OBJSUFFIX"] +library_name = "libopenvic-dataloader{}{}".format(suffix, env["LIBSUFFIX"]) + +if env["build_ovdl_library"]: + library = env.StaticLibrary(target=env.File("bin/%s" % library_name), source=sources) + Default(library) + +env.Append(LIBPATH=[env.Dir("bin")]) + +if library != None or os.path.exists("bin/%s" % library_name): + env.Append(LIBS=[library_name]) + +headless_program = None +env["PROGSUFFIX"] = suffix + env["PROGSUFFIX"] + +if env["build_ovdl_headless"]: + headless_name = "openvic-dataloader" + headless_env = env.Clone() + headless_path = ["src/headless"] + headless_env.Append(CPPDEFINES=["OPENVIC_DATALOADER_HEADLESS"]) + headless_env.Append(CPPPATH=[headless_env.Dir(headless_path)]) + headless_env.headless_sources = GlobRecursive("*.cpp", headless_path) + if not env["build_ovdl_library"]: + headless_env.headless_sources += sources + headless_program = env.Program( + target="bin/%s" % headless_name, + source=headless_env.headless_sources, + PROGSUFFIX=".headless" + env["PROGSUFFIX"] + ) + Default(headless_program) + + +if "env" in locals(): + # FIXME: This method mixes both cosmetic progress stuff and cache handling... + show_progress(env) + +Return("env")
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