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// -*- c++ -*-
// Distributed under the BSD 2-Clause License.
// See accompanying file LICENSE for details.
#include "task_ld.h"
#include <iostream>
#include <fstream>
#include "libctor.h"
#include "settings.h"
#include "execute.h"
namespace
{
std::string readFile(const std::string &fileName)
{
std::ifstream ifs(fileName.c_str(), std::ios::in | std::ios::binary | std::ios::ate);
std::ifstream::pos_type fileSize = ifs.tellg();
ifs.seekg(0, std::ios::beg);
std::vector<char> bytes(fileSize);
ifs.read(bytes.data(), fileSize);
return std::string(bytes.data(), fileSize);
}
} // namespace ::
TaskLD::TaskLD(const BuildConfiguration& config,
const Settings& settings,
const std::string& target,
const std::vector<std::string>& objects,
const std::string& sourcePath)
: Task(config)
, config(config)
, settings(settings)
{
target_type = config.type;
if(target_type == TargetType::Auto)
{
target_type = TargetType::Executable;
}
std::filesystem::path base = settings.builddir;
base /= sourcePath;
std::filesystem::create_directories(base);
targetFile = base / target;
for(const auto& object : objects)
{
std::filesystem::path objectFile = object;
objectFiles.push_back(objectFile);
dependsStr.push_back(objectFile.string());
}
for(const auto& dep : config.depends)
{
std::filesystem::path depFile = settings.builddir;
depFile /= dep;
depFiles.push_back(depFile);
}
flagsFile = base / targetFile.stem();
flagsFile += ".flags";
source_language = Language::C;
for(const auto& source : config.sources)
{
std::filesystem::path sourceFile(source.file);
if(sourceFile.extension().string() != ".c")
{
source_language = Language::Cpp;
}
}
}
bool TaskLD::dirtyInner()
{
if(!std::filesystem::exists(targetFile))
{
return true;
}
if(!std::filesystem::exists(flagsFile))
{
return true;
}
for(const auto& objectFile : objectFiles)
{
if(std::filesystem::last_write_time(targetFile) <=
std::filesystem::last_write_time(objectFile))
{
return true;
}
}
{
auto lastFlags = readFile(flagsFile.string());
if(flagsString() != lastFlags)
{
//std::cout << "The compiler flags changed\n";
return true;
}
}
return false;
}
int TaskLD::runInner()
{
std::string objectlist;
for(const auto& objectFile : objectFiles)
{
if(!objectlist.empty())
{
objectlist += " ";
}
objectlist += objectFile.string();
}
std::vector<std::string> args;
for(const auto& objectFile : objectFiles)
{
args.push_back(objectFile.string());
}
for(const auto& depFile : depFiles)
{
if(depFile.extension() == ".so")
{
args.push_back(std::string("-L") + settings.builddir);
auto lib = depFile.stem().string().substr(3); // strip 'lib' prefix
args.push_back(std::string("-l") + lib);
}
else if(depFile.extension() == ".a")
{
args.push_back(depFile.string());
}
}
for(const auto& flag : config.ldflags)
{
args.push_back(flag);
}
args.push_back("-o");
args.push_back(targetFile.string());
{ // Write flags to file.
std::ofstream flagsStream(flagsFile);
flagsStream << flagsString();
}
if(settings.verbose == 0)
{
std::cout << "LD => " << targetFile.string() << "\n";
}
auto tool = compiler();
return execute(tool, args, settings.verbose > 0);
}
int TaskLD::clean()
{
if(std::filesystem::exists(targetFile))
{
std::cout << "Removing " << targetFile.string() << "\n";
std::filesystem::remove(targetFile);
}
if(std::filesystem::exists(flagsFile))
{
std::cout << "Removing " << flagsFile.string() << "\n";
std::filesystem::remove(flagsFile);
}
return 0;
}
std::vector<std::string> TaskLD::depends() const
{
std::vector<std::string> deps;
for(const auto& objectFile : objectFiles)
{
deps.push_back(objectFile.string());
}
for(const auto& depFile : depFiles)
{
deps.push_back(depFile.string());
}
return deps;
}
std::string TaskLD::target() const
{
return targetFile.string();
}
std::string TaskLD::flagsString() const
{
std::string flagsStr;
for(const auto& flag : config.ldflags)
{
if(flag != config.ldflags[0])
{
flagsStr += " ";
}
flagsStr += flag;
}
flagsStr += "\n";
for(const auto& dep : config.depends)
{
if(dep != config.depends[0])
{
flagsStr += " ";
}
flagsStr += dep;
}
return flagsStr;
}
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