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// -*- c++ -*-
// Distributed under the BSD 2-Clause License.
// See accompanying file LICENSE for details.
#include "task_cc.h"
#include <iostream>
#include <fstream>
#include <cassert>
#include "libctor.h"
#include "execute.h"
#include "util.h"
#include "tools.h"
TaskCC::TaskCC(const BuildConfiguration& config, const Settings& settings,
const std::string& sourceDir, const Source& source)
: Task(config, settings, sourceDir)
, config(config)
, settings(settings)
, sourceDir(sourceDir)
, _source(source)
{
sourceFile = sourceDir;
sourceFile /= source.file;
std::filesystem::path base = sourceFile.parent_path();
base /= cleanUp(config.target);
base += "-";
base += sourceFile.stem();
target_type = TargetType::Object;
source_language = source.language;
if(source_language == Language::Auto)
{
source_language = languageFromExtension(sourceFile);
}
switch(source_language)
{
case Language::C:
base += "_c";
break;
case Language::Cpp:
base += "_cc";
break;
case Language::Asm:
base += "_asm";
break;
case Language::Auto:
assert(0 && "This should never happen");
break;
}
if(source.output.empty())
{
_targetFile = base;
_targetFile += ".obj";
}
else
{
_targetFile = source.output;
}
std::filesystem::create_directories(targetFile().parent_path());
depsFile = targetFile().parent_path() / targetFile().stem();
depsFile += ".deps";
flagsFile = targetFile().parent_path() / targetFile().stem();
flagsFile += ".flags";
}
int TaskCC::registerDepTasksInner(const std::set<std::shared_ptr<Task>>& tasks)
{
for(const auto& task : tasks)
{
if(*task == _source.file)
{
dependsTasks.insert(task);
}
}
return 0;
}
std::string TaskCC::name() const
{
return {};
}
bool TaskCC::dirtyInner()
{
if(!std::filesystem::exists(sourceFile))
{
//std::cout << "Missing source file: " << std::string(sourceFile) << "\n";
return true;
}
if(!std::filesystem::exists(targetFile()))
{
//std::cout << "Missing targetFile\n";
return true;
}
if(!std::filesystem::exists(depsFile))
{
//std::cout << "Missing depsFile\n";
return true;
}
if(!std::filesystem::exists(flagsFile))
{
//std::cout << "Missing flagsFile\n";
return true;
}
if(std::filesystem::last_write_time(sourceFile) >
std::filesystem::last_write_time(depsFile))
{
//std::cout << "The sourceFile newer than depsFile\n";
return true;
}
{
auto lastFlags = readFile(flagsFile.string());
if(flagsString() != lastFlags)
{
//std::cout << "The compiler flags changed\n";
return true;
}
}
auto depList = readDeps(depsFile.string());
for(const auto& dep : depList)
{
if(!std::filesystem::exists(dep) ||
std::filesystem::last_write_time(targetFile()) <
std::filesystem::last_write_time(dep))
{
//std::cout << "The targetFile older than " << std::string(dep) << "\n";
return true;
}
}
if(std::filesystem::last_write_time(sourceFile) >
std::filesystem::last_write_time(targetFile()))
{
//std::cout << "The targetFile older than sourceFile\n";
return true;
}
return false;
}
int TaskCC::runInner()
{
if(!std::filesystem::exists(sourceFile))
{
std::cout << "Missing source file: " << sourceFile.string() << "\n";
return 1;
}
auto args = getCompilerArgs();
{ // Write flags to file.
std::ofstream flagsStream(flagsFile.string());
flagsStream << flagsString();
}
if(settings.verbose == 0)
{
switch(sourceLanguage())
{
case Language::C:
std::cout << "CC ";
break;
case Language::Cpp:
std::cout << "CXX ";
break;
case Language::Auto:
case Language::Asm:
// Only c/c++ handled by this task type.
break;
}
std::cout <<
sourceFile.lexically_normal().string() << " => " <<
targetFile().lexically_normal().string() << "\n";
}
const auto& cfg = configuration();
return execute(compiler(), args, cfg.env, settings.verbose > 0);
}
int TaskCC::clean()
{
if(std::filesystem::exists(targetFile()))
{
std::cout << "Removing " << targetFile().string() << "\n";
std::filesystem::remove(targetFile());
}
if(std::filesystem::exists(depsFile))
{
std::cout << "Removing " << depsFile.string() << "\n";
std::filesystem::remove(depsFile);
}
if(std::filesystem::exists(flagsFile))
{
std::cout << "Removing " << flagsFile.string() << "\n";
std::filesystem::remove(flagsFile);
}
return 0;
}
std::vector<std::string> TaskCC::depends() const
{
return {};
}
std::string TaskCC::target() const
{
return _targetFile.string();
}
std::filesystem::path TaskCC::targetFile() const
{
return std::filesystem::path(settings.builddir) / _targetFile;
}
bool TaskCC::derived() const
{
return true;
}
std::string TaskCC::toJSON() const
{
std::string json;
json += "\t{\n";
json += "\t\t\"directory\": \"" + sourceDir.string() + "\",\n";
json += "\t\t\"file\": \"" + sourceFile.lexically_normal().string() + "\",\n";
json += "\t\t\"output\": \"" + targetFile().string() + "\",\n";
json += "\t\t\"arguments\": [ \"" + compiler() + "\"";
auto args = getCompilerArgs();
for(const auto& arg : args)
{
json += ", \"" + arg + "\"";
}
json += " ]\n";
json += "\t}";
return json;
}
std::string TaskCC::source() const
{
return sourceFile.string();
}
std::vector<std::string> TaskCC::flags() const
{
switch(sourceLanguage())
{
case Language::C:
return config.flags.cflags;
case Language::Cpp:
return config.flags.cxxflags;
default:
std::cerr << "Unknown CC target type\n";
exit(1);
break;
}
}
std::string TaskCC::flagsString() const
{
std::string flagsStr = compiler();
for(const auto& flag : flags())
{
flagsStr += " " + flag;
}
return flagsStr;
}
std::vector<std::string> TaskCC::getCompilerArgs() const
{
auto tool_chain = getToolChain(config.system);
auto compiler_flags = flags();
// cl.exe (compiler - gcc/g++)
// https://docs.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-alphabetically?view=msvc-170
// /c Compiles without linking.
// /Fo Object File Name (or path if .cc basename is re-used)
// /F Output-File
// /Fe (Name EXE File)
// /sourceDependencies <file> json file with dependenciy tree
// /I<dir> include path
// /LD Creates a dynamic-link library.
// /link <option> Passes the specified option to LINK.
// link.exe (exe and dll linker - ld)
// https://docs.microsoft.com/en-us/cpp/build/reference/linker-options?view=msvc-170
// lib.exe (lib linker - ar)
// https://docs.microsoft.com/en-us/cpp/build/reference/overview-of-lib?view=msvc-170
std::vector<std::string> args;
append(args, getOption(tool_chain, opt::generate_dep_tree, depsFile.string()));
// args.push_back("-MMD"); // https://github.com/ninja-build/ninja/issues/1806
if(std::filesystem::path(config.target).extension() == ".so")
{
// Add -fPIC arg to all contained object files
append(args, getOption(tool_chain, opt::position_independent_code));
}
append(args, getOption(tool_chain, opt::no_link));
args.push_back(sourceFile.string());
append(args, getOption(tool_chain, opt::output, targetFile().string()));
for(const auto& flag : compiler_flags)
{
auto option = getOption(flag);
switch(option.first)
{
// Relative include paths has to be altered to be relative to sourceDir
case opt::include_path:
{
std::filesystem::path path(option.second);
if(path.is_relative())
{
path = (sourceDir / path).lexically_normal();
append(args, getOption(tool_chain, opt::include_path, path.string()));
}
}
continue;
default:
break;
}
args.push_back(flag);
}
return args;
}
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