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// file : build/cxx/module.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build/cxx/module>
#include <butl/process>
#include <butl/fdstream>
#include <build/scope>
#include <build/diagnostics>
#include <build/bin/module>
#include <build/config/utility>
using namespace std;
using namespace butl;
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";
// Initialize the bin module.
//
bin::init (root, base, l);
//@@ TODO: need to register target types, rules here instead of main().
const dir_path& out_root (root.path ());
level4 ([&]{trace << "for " << out_root;});
// Configure.
//
// config.cxx
//
{
auto r (config::required (root, "config.cxx", "g++"));
// If we actually set a new value, test it by trying to execute.
//
if (r.second)
{
const string& cxx (r.first);
const char* args[] = {cxx.c_str (), "-dumpversion", nullptr};
if (verb)
print_process (args);
else
text << "test " << cxx;
string ver;
try
{
process pr (args, false, false, true);
ifdstream is (pr.in_ofd);
bool r (getline (is, ver));
if (!pr.wait ())
throw failed ();
if (!r)
fail << "unexpected output from " << cxx;
}
catch (const process_error& e)
{
error << "unable to execute " << cxx << ": " << e.what ();
if (e.child ())
exit (1);
throw failed ();
}
if (verb)
text << cxx << " " << ver;
}
}
// config.cxx.{p,c,l}options
// config.cxx.libs
//
// These are optional. We also merge them into the corresponding
// cxx.* variables.
//
if (auto* v = config::optional<list_value> (root, "config.cxx.poptions"))
root.append ("cxx.poptions") += *v;
if (auto* v = config::optional<list_value> (root, "config.cxx.coptions"))
root.append ("cxx.coptions") += *v;
if (auto* v = config::optional<list_value> (root, "config.cxx.loptions"))
root.append ("cxx.loptions") += *v;
if (auto* v = config::optional<list_value> (root, "config.cxx.libs"))
root.append ("cxx.libs") += *v;
}
}
}
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