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// -*- c++ -*-
// Distributed under the BSD 2-Clause License.
// See accompanying file LICENSE for details.
#include "tools.h"
#include <filesystem>
#include <iostream>
#include <cassert>
/*
https://docs.microsoft.com/en-us/cpp/build/reference/compiler-options-listed-alphabetically?view=msvc-170
/TC Specifies all source files are C.
/Tc Specifies a C source file.
/TP Specifies all source files are C++.
/Tp Specifies a C++ source file.
*/
ToolChain getToolChain(OutputSystem system)
{
std::string compiler;
switch(system)
{
case OutputSystem::Host:
compiler = getConfiguration(cfg::host_cxx, "g++");
break;
case OutputSystem::Build:
compiler = getConfiguration(cfg::build_cxx, "g++");
break;
}
std::filesystem::path cc(compiler);
auto cc_cmd = cc.stem().string();
// Note: "g++" is a substring of "clang++" so "clang++" must be tested first.
if(cc_cmd.find("clang++") != std::string::npos)
{
return ToolChain::clang;
}
else if(cc_cmd.find("g++") != std::string::npos)
{
return ToolChain::gcc;
}
else if(cc_cmd.find("cl") != std::string::npos ||
cc_cmd.find("CL") != std::string::npos)
{
return ToolChain::msvc;
}
std::cerr << "Unsupported output system.\n";
return ToolChain::gcc;
}
namespace
{
std::vector<std::string> getOptionGcc(opt option, const std::string& arg)
{
switch(option)
{
case opt::output:
return {"-o", arg};
case opt::debug:
return {"-g"};
case opt::strip:
return {"-s"};
case opt::warn_all:
return {"-Wall"};
case opt::warnings_as_errors:
return {"-Werror"};
case opt::generate_dep_tree:
return {"-MMD", "-MF" + arg};
case opt::no_link:
return {"-c"};
case opt::include_path:
return {"-I" + arg};
case opt::library_path:
return {"-L" + arg};
case opt::link:
return {"-l" + arg};
case opt::cpp_std:
return {"-std=" + arg};
case opt::build_shared:
return {"-shared"};
case opt::threads:
return {"-pthread"};
case opt::optimization:
return {"-O" + arg};
case opt::position_independent_code:
return {"-fPIC"};
case opt::position_independent_executable:
return {"-fPIE"};
case opt::custom:
return {arg};
}
std::cerr << "Unsupported compiler option.\n";
return {};
}
std::vector<std::string> getOptionMsvc(opt option, const std::string& arg)
{
switch(option)
{
case opt::output:
return {"/Fo\""+arg+"\""};
case opt::debug:
return {"/DEBUG"};
case opt::strip:
return {};//{"-s"}; TODO
case opt::warn_all:
return {"/Wall"};
case opt::warnings_as_errors:
return {"/WX"};
case opt::generate_dep_tree:
return {"/sourceDependencies", arg};
case opt::no_link:
return {"/c"};
case opt::include_path:
return {"/I" + arg};
case opt::library_path:
return {"/LIBPATH:" + arg};
case opt::link:
return {}; //{"-l" + arg}; TODO
case opt::cpp_std:
return {"/std:" + arg};
case opt::build_shared:
return {};//{"-shared"}; TODO
case opt::threads:
return {};// {"-pthread"}; TODO
case opt::optimization:
return {"/O" + arg}; // TODO: max 2
case opt::position_independent_code:
return {};//{"-fPIC"}; TODO
case opt::position_independent_executable:
return {};//{"-fPIE"}; TODO
case opt::custom:
return {arg};
}
std::cerr << "Unsupported compiler option.\n";
return {};
}
}
std::vector<std::string> getOption(ToolChain tool_chain,
opt option,
const std::string& arg)
{
switch(tool_chain)
{
case ToolChain::gcc:
case ToolChain::clang:
return getOptionGcc(option, arg);
case ToolChain::msvc:
return getOptionMsvc(option, arg);
}
std::cerr << "Unsupported tool-chain.\n";
return {};
}
namespace {
std::pair<opt, std::string> getOptionGcc(const std::string& flag)
{
if(flag.substr(0, 2) == "-I")
{
std::string path = flag.substr(2);
path.erase(0, path.find_first_not_of(' '));
return { opt::include_path, path };
}
if(flag.substr(0, 2) == "-L")
{
std::string path = flag.substr(2);
path.erase(0, path.find_first_not_of(' '));
return { opt::library_path, path };
}
return { opt::custom, flag };
}
}
std::pair<opt, std::string> getOption(const std::string& flag,
ToolChain tool_chain)
{
switch(tool_chain)
{
case ToolChain::gcc:
case ToolChain::clang:
return getOptionGcc(flag);
case ToolChain::msvc:
break; // TODO
}
std::cerr << "Unsupported tool-chain.\n";
return { opt::custom, flag };
}
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