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// file : build/cxx/module.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <build/cxx/module>
#include <istream>
#include <ext/stdio_filebuf.h>
#include <build/path>
#include <build/scope>
#include <build/process>
#include <build/diagnostics>
using namespace std;
namespace build
{
namespace cxx
{
void
init (scope& root, scope& base, const location& l)
{
//@@ TODO: avoid multiple inits (generally, for modules).
//
tracer trace ("cxx::init");
//@@ Should it be this way?
//
if (&root != &base)
fail (l) << "cxx module must be initialized in project root scope";
//@@ TODO: need to register target types, rules here instead of main().
const path& out_root (root.path ());
level4 ([&]{trace << "for " << out_root << '/';});
// Configure.
//
// config.cxx
//
for (bool f (true); f; f = false)
{
auto val (root["config.cxx"]);
string v;
if (val)
{
if (val.scope != global_scope)
break; // A value from config.build.
v = val.as<const string&> ();
}
else
v = "g++"; // Default.
// Test it by trying to execute.
//
const char* args[] = {v.c_str (), "-dumpversion", nullptr};
if (verb >= 1)
print_process (args);
else
text << "test " << v;
string ver;
try
{
process pr (args, false, false, true);
__gnu_cxx::stdio_filebuf<char> fb (pr.in_ofd, ios_base::in);
istream is (&fb);
bool r (getline (is, ver));
if (!pr.wait ())
throw failed ();
if (!r)
fail << "unexpected output from " << v;
}
catch (const process_error& e)
{
error << "unable to execute " << v << ": " << e.what ();
if (e.child ())
exit (1);
throw failed ();
}
//text << "toolchain version " << ver;
// Set on the project root.
//
root.variables["config.cxx"] = move (v);
}
// config.cxx.{p,c,l}options
// config.cxx.libs
//
// These are optional so all we need to do is "import" them
// into the root scope if they were specified on the command
// line and set them to empty if unspecified (the last part
// is important to distinguish between the "configured as
// undefined" and "not configured" cases).
//
if (auto val = root["config.cxx.poptions"])
{
if (val.scope == global_scope)
root.variables["config.cxx.poptions"] = val;
}
else
root.variables["config.cxx.poptions"]; // Undefined.
if (auto val = root["config.cxx.coptions"])
{
if (val.scope == global_scope)
root.variables["config.cxx.coptions"] = val;
}
else
root.variables["config.cxx.coptions"]; // Undefined.
if (auto val = root["config.cxx.loptions"])
{
if (val.scope == global_scope)
root.variables["config.cxx.loptions"] = val;
}
else
root.variables["config.cxx.loptions"]; // Undefined.
if (auto val = root["config.cxx.libs"])
{
if (val.scope == global_scope)
root.variables["config.cxx.libs"] = val;
}
else
root.variables["config.cxx.libs"]; // Undefined.
}
}
}
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