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// -*- c++ -*-
// Distributed under the BSD 2-Clause License.
// See accompanying file LICENSE for details.
#pragma once
#include <source_location>
#include <string>
#include <vector>
#include <map>
#include <variant>
#include <cstddef>
#include <functional>
enum class TargetType
{
Auto, // Default - deduce from target name and sources extensions
Executable,
StaticLibrary,
DynamicLibrary,
Object,
UnitTest,
UnitTestLib,
Function,
};
enum class Language
{
Auto, // Default - deduce language from source extensions
C,
Cpp,
Asm,
};
enum class OutputSystem
{
Host, // Output for the target system
Build, // Internal tool during cross-compilation
};
struct Source
{
Source(const char* file) : file(file) {}
Source(const std::string& file) : file(file) {}
Source(const char* file, Language lang) : file(file), language(lang) {}
Source(const std::string& file, Language lang) : file(file), language(lang) {}
Source(const char* file, const char* output) : file(file), output(output) {}
Source(const std::string& file, const std::string& output) : file(file), output(output) {}
Source(const char* file, Language lang, const char* output) : file(file), language(lang), output(output) {}
Source(const std::string& file, Language lang, const std::string& output) : file(file), language(lang), output(output) {}
std::string file;
Language language{Language::Auto};
std::string output{};
};
struct Flags
{
std::vector<std::string> cxxflags; // flags for c++ compiler
std::vector<std::string> cflags; // flags for c compiler
std::vector<std::string> ldflags; // flags for linker
std::vector<std::string> asmflags; // flags for asm translator
};
struct Settings
{
std::string builddir{"build"};
std::size_t parallel_processes{1};
int verbose{0}; // -1: completely silent, 0: normal, 1: verbose, ...
};
struct BuildConfiguration;
using GeneratorCb = std::function<int(const std::string& input,
const std::string& output,
const BuildConfiguration& config,
const Settings& settings)>;
struct BuildConfiguration
{
std::string name; // Name - used for referring in other configurations.
TargetType type{TargetType::Auto};
OutputSystem system{OutputSystem::Host};
std::string target; // Output target file for this configuration
std::vector<Source> sources; // source list
std::vector<std::string> depends; // internal target dependencies
Flags flags;
std::vector<std::string> externals; // externals used by this configuration
GeneratorCb function;
};
using BuildConfigurations = std::vector<BuildConfiguration>;
int reg(BuildConfigurations (*cb)(const Settings&),
const std::source_location location = std::source_location::current());
// This type will use flags verbatim
struct ExternalManual
{
Flags flags;
};
struct ExternalConfiguration
{
std::string name; // Name for configuration
OutputSystem system{OutputSystem::Host};
std::variant<ExternalManual> external;
};
using ExternalConfigurations = std::vector<ExternalConfiguration>;
int reg(ExternalConfigurations (*cb)(const Settings&),
const std::source_location location = std::source_location::current());
// Convenience macro - ugly but keeps things simple(r)
#define CONCAT(a, b) CONCAT_INNER(a, b)
#define CONCAT_INNER(a, b) a ## b
#define UNIQUE_NAME(base) CONCAT(base, __LINE__)
#define REG(cb) namespace { int UNIQUE_NAME(unique) = reg(cb); }
// Predefined configuration keys
namespace cfg
{
constexpr auto builddir = "builddir";
constexpr auto host_cc = "host-cc";
constexpr auto host_cxx = "host-cpp";
constexpr auto host_ar = "host-ar";
constexpr auto host_ld = "host-ld";
constexpr auto build_cc = "build-cc";
constexpr auto build_cxx = "build-cpp";
constexpr auto build_ar = "build-ar";
constexpr auto build_ld = "build-ld";
constexpr auto ctor_includedir = "ctor-includedir";
constexpr auto ctor_libdir = "ctor-libdir";
}
struct Configuration
{
std::vector<std::string> args; // vector of arguments used when last calling configure
std::map<std::string, std::string> env; // env used when last calling configure
std::map<std::string, std::string> tools; // tools
std::map<std::string, Flags> externals;
};
const Configuration& configuration();
bool hasConfiguration(const std::string& key);
const std::string& getConfiguration(const std::string& key,
const std::string& defaultValue = {});
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