source/builder.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2010  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <set>
   9 #include <cstdlib>
  10 #include <msp/core/except.h>
  11 #include <msp/core/getopt.h>
  12 #include <msp/datafile/parser.h>
  13 #include <msp/fs/dir.h>
  14 #include <msp/fs/stat.h>
  15 #include <msp/fs/utils.h>
  16 #include <msp/io/buffered.h>
  17 #include <msp/io/except.h>
  18 #include <msp/io/file.h>
  19 #include <msp/io/print.h>
  20 #include <msp/strings/formatter.h>
  21 #include <msp/strings/regex.h>
  22 #include <msp/strings/utils.h>
  23 #include <msp/time/units.h>
  24 #include <msp/time/utils.h>
  25 #include "action.h"
  26 #include "analyzer.h"
  27 #include "binarypackage.h"
  28 #include "builder.h"
  29 #include "header.h"
  30 #include "install.h"
  31 #include "misc.h"
  32 #include "package.h"
  33 #include "pkgconfig.h"
  34 #include "sharedlibrary.h"
  35 #include "sourcepackage.h"
  36 #include "systemlibrary.h"
  37 #include "unlink.h"
  38 #include "virtualtarget.h"
  39
  40 using namespace std;
  41 using namespace Msp;
  42
  43 namespace {
  44
  45 void update_hash(string &hash, const string &value)
  46 {
  47         for(unsigned i=0; i<value.size(); ++i)
  48                 hash[i%hash.size()] ^= value[i];
  49 }
  50
  51 }
  52
  53
  54 Builder::Builder(int argc, char **argv):
  55         main_pkg(0),
  56         native_arch(*this, string()),
  57         analyzer(0),
  58         build(false),
  59         clean(0),
  60         dry_run(false),
  61         help(false),
  62         verbose(1),
  63         show_progress(false),
  64         build_file("Build"),
  65         jobs(1),
  66         conf_all(false),
  67         conf_only(false),
  68         build_all(false),
  69         create_makefile(false)
  70 {
  71         string analyze_mode;
  72         string work_dir;
  73         bool full_paths = false;
  74         unsigned max_depth = 5;
  75         StringList cmdline_warn;
  76         string prfx;
  77         string arch;
  78
  79         GetOpt getopt;
  80         getopt.add_option('a', "analyze",    analyze_mode,  GetOpt::REQUIRED_ARG).set_help("Perform analysis.  MODE can be deps, alldeps or rebuild.", "MODE");
  81         getopt.add_option('b', "build",      build,         GetOpt::NO_ARG).set_help("Perform build even if doing analysis.");
  82         getopt.add_option('c', "clean",      clean,         GetOpt::NO_ARG).set_help("Clean buildable targets.");
  83         getopt.add_option('f', "file",       build_file,    GetOpt::REQUIRED_ARG).set_help("Read info from FILE instead of Build.", "FILE");
  84         getopt.add_option('h', "help",       help,          GetOpt::NO_ARG).set_help("Print this message.");
  85         getopt.add_option('j', "jobs",       jobs,          GetOpt::REQUIRED_ARG).set_help("Run NUM commands at once, whenever possible.", "NUM");
  86         getopt.add_option('n', "dry-run",    dry_run,       GetOpt::NO_ARG).set_help("Don't actually do anything, only show what would be done.");
  87         getopt.add_option('v', "verbose",    verbose,       GetOpt::NO_ARG).set_help("Print more information about what's going on.");
  88         getopt.add_option('x', "no-externals",  no_externals, GetOpt::NO_ARG).set_help("Do not load external source packages.");
  89         getopt.add_option('A', "conf-all",   conf_all,      GetOpt::NO_ARG).set_help("Apply configuration to all packages.");
  90         getopt.add_option('B', "build-all",  build_all,     GetOpt::NO_ARG).set_help("Build all targets unconditionally.");
  91         getopt.add_option('C', "chdir",      work_dir,      GetOpt::REQUIRED_ARG).set_help("Change to DIR before doing anything else.", "DIR");
  92         getopt.add_option('P', "progress",   show_progress, GetOpt::NO_ARG).set_help("Display progress while building.");
  93         getopt.add_option('W', "what-if",    what_if,       GetOpt::REQUIRED_ARG).set_help("Pretend that FILE has changed.", "FILE");
  94         getopt.add_option(     "arch",       arch,          GetOpt::REQUIRED_ARG).set_help("Architecture to build for.", "ARCH");
  95         getopt.add_option(     "conf-only",  conf_only,     GetOpt::NO_ARG).set_help("Stop after configuring packages.");
  96         getopt.add_option(     "full-paths", full_paths,    GetOpt::NO_ARG).set_help("Output full paths in analysis.");
  97         getopt.add_option(     "max-depth",  max_depth,     GetOpt::REQUIRED_ARG).set_help("Maximum depth to show in analysis.", "NUM");
  98         getopt.add_option(     "prefix",     prfx,          GetOpt::REQUIRED_ARG).set_help("Directory to install things to.", "DIR");
  99         getopt.add_option(     "warnings",   cmdline_warn,  GetOpt::REQUIRED_ARG).set_help("Compiler warnings to use.", "LIST");
 100         usagemsg = getopt.generate_usage(argv[0])+" [<target> ...]";
 101         helpmsg = getopt.generate_help();
 102         getopt(argc, argv);
 103
 104         if(!analyze_mode.empty())
 105         {
 106                 analyzer = new Analyzer(*this);
 107
 108                 if(analyze_mode=="deps")
 109                         analyzer->set_mode(Analyzer::DEPS);
 110                 else if(analyze_mode=="alldeps")
 111                         analyzer->set_mode(Analyzer::ALLDEPS);
 112                 else if(analyze_mode=="rebuild")
 113                         analyzer->set_mode(Analyzer::REBUILD);
 114                 else if(analyze_mode=="rdeps")
 115                         analyzer->set_mode(Analyzer::RDEPS);
 116                 else
 117                         throw UsageError("Invalid analyze mode");
 118
 119                 analyzer->set_max_depth(max_depth);
 120                 analyzer->set_full_paths(full_paths);
 121         }
 122         else if(!clean && !create_makefile)
 123                 build = true;
 124
 125         const vector<string> &args = getopt.get_args();
 126         for(vector<string>::const_iterator i=args.begin(); i!=args.end(); ++i)
 127         {
 128                 string::size_type equal = i->find('=');
 129                 if(equal!=string::npos)
 130                         cmdline_options.insert(StringMap::value_type(i->substr(0, equal), i->substr(equal+1)));
 131                 else
 132                         cmdline_targets.push_back(*i);
 133         }
 134
 135         if(cmdline_targets.empty())
 136                 cmdline_targets.push_back("default");
 137
 138         if(!work_dir.empty())
 139                 FS::chdir(work_dir);
 140
 141         cwd = FS::getcwd();
 142
 143         native_arch.set_tool("CC",  "gcc");
 144         native_arch.set_tool("CXX", "g++");
 145         native_arch.set_tool("LD",  "gcc");
 146         native_arch.set_tool("LXX", "g++");
 147         native_arch.set_tool("AR",  "ar");
 148
 149         load_build_file((FS::get_sys_data_dir(argv[0], "builder")/"builderrc").str());
 150         load_build_file((FS::get_user_data_dir("builder")/"rc").str());
 151
 152         if(arch.empty())
 153                 current_arch = &native_arch;
 154         else
 155                 current_arch = new Architecture(*this, arch);
 156
 157         if(!current_arch->is_native())
 158         {
 159                 for(StringMap::const_iterator i=cross_prefixes.begin(); i!=cross_prefixes.end(); ++i)
 160                         if(current_arch->match_name(i->first))
 161                         {
 162                                 current_arch->set_cross_prefix(i->second);
 163                                 break;
 164                         }
 165         }
 166
 167         if(prfx.empty())
 168         {
 169                 if(current_arch->is_native())
 170                         prefix = (FS::get_home_dir()/"local").str();
 171                 else
 172                         prefix = (FS::get_home_dir()/"local"/current_arch->get_name()).str();
 173         }
 174         else
 175                 prefix = FS::getcwd()/prfx;
 176
 177         warnings.push_back("all");
 178         warnings.push_back("extra");
 179         warnings.push_back("shadow");
 180         warnings.push_back("pointer-arith");
 181         warnings.push_back("error");
 182         for(StringList::iterator i=cmdline_warn.begin(); i!=cmdline_warn.end(); ++i)
 183         {
 184                 vector<string> warns = split(*i, ',');
 185                 warnings.insert(warnings.end(), warns.begin(), warns.end());
 186         }
 187
 188         pkg_path.push_back(cwd/".");
 189         pkg_path.push_back(cwd/"..");
 190 }
 191
 192 Builder::~Builder()
 193 {
 194         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 195                 delete i->second;
 196         for(TargetMap::iterator i=targets.begin(); i!=targets.end(); ++i)
 197                 delete i->second;
 198         delete analyzer;
 199 }
 200
 201 int Builder::main()
 202 {
 203         if(prefix.str()!="/usr")
 204         {
 205                 FS::Path pcdir = prefix/"lib"/"pkgconfig";
 206                 if(const char *pcp = getenv("PKG_CONFIG_PATH"))
 207                 {
 208                         vector<string> path = split(pcp, ':');
 209                         bool found = false;
 210                         for(vector<string>::const_iterator i=path.begin(); (!found && i!=path.end()); ++i)
 211                                 found = (*i==pcdir.str());
 212                         if(!found)
 213                         {
 214                                 path.push_back(pcdir.str());
 215                                 setenv("PKG_CONFIG_PATH", join(path.begin(), path.end(), ":").c_str(), true);
 216                         }
 217                 }
 218                 else
 219                         setenv("PKG_CONFIG_PATH", pcdir.str().c_str(), true);
 220         }
 221
 222         if(load_build_file(cwd/build_file))
 223         {
 224                 if(help)
 225                 {
 226                         usage(0, "builder", false);
 227                         return 0;
 228                 }
 229                 else
 230                 {
 231                         IO::print(IO::cerr, "No build info here.\n");
 232                         return 1;
 233                 }
 234         }
 235
 236         main_pkg->configure(cmdline_options, conf_all?2:1);
 237
 238         if(help)
 239         {
 240                 usage(0, "builder", false);
 241                 IO::print("\n");
 242                 package_help();
 243                 return 0;
 244         }
 245
 246         if(conf_only)
 247                 return 0;
 248
 249         if(create_targets())
 250                 return 1;
 251
 252         if(verbose>=2)
 253         {
 254                 IO::print("Building on %s, for %s%s\n", native_arch.get_name(),
 255                         current_arch->get_name(), (current_arch->is_native() ? " (native)" : ""));
 256                 IO::print("Prefix is %s\n", prefix);
 257         }
 258
 259         if(verbose>=1)
 260         {
 261                 unsigned n_packages = 0;
 262                 for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 263                         if(i->second && i->second->is_configured())
 264                                 ++n_packages;
 265                 IO::print("%d active packages, %d targets\n", n_packages, targets.size());
 266         }
 267
 268         if(verbose>=2)
 269         {
 270                 for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 271                 {
 272                         if(!i->second->is_configured())
 273                                 continue;
 274
 275                         IO::print(" %s", i->second->get_name());
 276                         if(dynamic_cast<SourcePackage *>(i->second))
 277                                 IO::print("*");
 278                         unsigned count = 0;
 279                         unsigned to_be_built = 0;
 280                         for(TargetMap::iterator j=targets.begin(); j!=targets.end(); ++j)
 281                                 if(j->second->get_package()==i->second)
 282                                 {
 283                                         ++count;
 284                                         if(j->second->get_rebuild())
 285                                                 ++to_be_built;
 286                                 }
 287                         if(count)
 288                         {
 289                                 IO::print(" (%d targets", count);
 290                                 if(to_be_built)
 291                                         IO::print(", %d to be built", to_be_built);
 292                                 IO::print(")");
 293                         }
 294                         IO::print("\n");
 295                 }
 296         }
 297
 298         if(analyzer)
 299                 analyzer->analyze();
 300
 301         if(!problems.empty())
 302         {
 303                 IO::print(IO::cerr, "The following problems were detected:\n");
 304                 for(ProblemList::iterator i=problems.begin(); i!=problems.end(); ++i)
 305                         IO::print(IO::cerr, "  %s: %s\n", i->package, i->descr);
 306                 if(!analyzer)
 307                         IO::print(IO::cerr, "Please fix them and try again.\n");
 308                 return 1;
 309         }
 310
 311         if(clean)
 312                 exit_code = do_clean();
 313         else if(build)
 314                 exit_code = do_build();
 315
 316         return exit_code;
 317 }
 318
 319 string Builder::run_pkgconfig(const string &pkg, const string &what)
 320 {
 321         list<string> argv;
 322         argv.push_back("pkg-config");
 323         if(what=="cflags" || what=="libs")
 324                 argv.push_back("--"+what);
 325         else if(what=="flags")
 326         {
 327                 argv.push_back("--cflags");
 328                 argv.push_back("--libs");
 329         }
 330         else
 331                 argv.push_back("--variable="+what);
 332         argv.push_back(pkg);
 333
 334         if(verbose>=4)
 335                 IO::print("Running %s\n", join(argv.begin(), argv.end()));
 336
 337         int status;
 338         string res = run_command(argv, &status);
 339         if(status)
 340                 throw Exception(format("pkg-config for package %s failed", pkg));
 341
 342         return res;
 343 }
 344
 345 Package *Builder::get_package(const string &name)
 346 {
 347         PackageMap::iterator i = packages.find(format("%s/%s", name, current_arch->get_system()));
 348         if(i==packages.end())
 349                 i = packages.find(name);
 350         if(i!=packages.end())
 351                 return i->second;
 352
 353         if(!no_externals)
 354         {
 355                 FS::Path path = get_package_location(name);
 356                 if(!path.empty() && !load_build_file(path/"Build"))
 357                 {
 358                         i = packages.find(name);
 359                         if(i!=packages.end())
 360                                 return i->second;
 361                 }
 362         }
 363
 364         Package *pkg = 0;
 365         try
 366         {
 367                 // Package source not found - create a binary package
 368                 pkg = BinaryPackage::from_pkgconfig(*this, name);
 369         }
 370         catch(...)
 371         {
 372                 problem(name, "not found");
 373         }
 374
 375         packages.insert(PackageMap::value_type(name, pkg));
 376
 377         return pkg;
 378 }
 379
 380 Target *Builder::get_target(const string &n) const
 381 {
 382         // XXX Used for getting targets by path.  get_target(const FS::Path &)?
 383         TargetMap::const_iterator i = targets.find(n);
 384         if(i!=targets.end())
 385                 return i->second;
 386         return 0;
 387 }
 388
 389 Target *Builder::get_header(const string &include, const FS::Path &from, const list<string> &path)
 390 {
 391         string hash(8, 0);
 392         if(include[0]=='\"')
 393                 update_hash(hash, from.str());
 394         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 395                 update_hash(hash, *i);
 396
 397         string id = hash+include;
 398         TargetMap::iterator i = includes.find(id);
 399         if(i!=includes.end())
 400                 return i->second;
 401
 402         static string cxx_ver;
 403         if(cxx_ver.empty())
 404         {
 405                 StringList argv;
 406                 argv.push_back(current_arch->get_tool("CXX"));
 407                 argv.push_back("--version");
 408                 if(RegMatch m = Regex("[0-9]\\.[0-9.]+").match(run_command(argv)))
 409                 {
 410                         cxx_ver = m[0].str;
 411                         while(!cxx_ver.empty() && !FS::is_dir(FS::Path("/usr/include/c++")/cxx_ver))
 412                         {
 413                                 string::size_type dot = cxx_ver.rfind('.');
 414                                 if(dot==string::npos)
 415                                         break;
 416                                 cxx_ver.erase(dot);
 417                         }
 418                         if(verbose>=5)
 419                                 IO::print("C++ version is %s\n", cxx_ver);
 420                 }
 421                 else
 422                         cxx_ver = "-";
 423         }
 424
 425         string fn = include.substr(1);
 426         if(verbose>=5)
 427                 IO::print("Looking for include %s from %s with path %s\n", fn, from, join(path.begin(), path.end()));
 428
 429         StringList syspath;
 430         if(current_arch->is_native())
 431                 syspath.push_back("/usr/include");
 432         else
 433                 syspath.push_back("/usr/"+current_arch->get_cross_prefix()+"/include");
 434         if(cxx_ver!="-")
 435                 syspath.push_back((FS::Path("/usr/include/c++/")/cxx_ver).str());
 436
 437         Target *tgt = 0;
 438         if(include[0]=='\"')
 439                 tgt = get_header(FS::Path(from)/fn);
 440         for(list<string>::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 441                 tgt = get_header(cwd/ *j/fn);
 442         for(list<string>::const_iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 443                 tgt = get_header(FS::Path(*j)/fn);
 444
 445         includes.insert(TargetMap::value_type(id, tgt));
 446
 447         return tgt;
 448 }
 449
 450 Target *Builder::get_library(const string &lib, const list<string> &path, LibMode mode)
 451 {
 452         string hash(8, 0);
 453         for(list<string>::const_iterator i=path.begin(); i!=path.end(); ++i)
 454                 update_hash(hash, *i);
 455
 456         string id = hash+string(1, mode)+lib;
 457         TargetMap::iterator i = libraries.find(id);
 458         if(i!=libraries.end())
 459                 return i->second;
 460
 461         StringList syspath;
 462         if(current_arch->is_native())
 463         {
 464                 syspath.push_back("/lib");
 465                 syspath.push_back("/usr/lib");
 466         }
 467         else
 468                 syspath.push_back("/usr/"+current_arch->get_cross_prefix()+"/lib");
 469
 470         if(verbose>=5)
 471                 IO::print("Looking for library %s with path %s\n", lib, join(path.begin(), path.end()));
 472
 473         Target *tgt = 0;
 474         for(StringList::const_iterator j=path.begin(); (!tgt && j!=path.end()); ++j)
 475                 tgt = get_library(lib, cwd/ *j, mode);
 476         for(StringList::iterator j=syspath.begin(); (!tgt && j!=syspath.end()); ++j)
 477                 tgt = get_library(lib, *j, mode);
 478
 479         libraries.insert(TargetMap::value_type(id, tgt));
 480
 481         return tgt;
 482 }
 483
 484 void Builder::apply_profile_template(Config &config, const string &pt) const
 485 {
 486         vector<string> parts = split(pt, '-');
 487
 488         for(vector<string>::iterator i=parts.begin(); i!=parts.end(); ++i)
 489         {
 490                 ProfileTemplateMap::const_iterator j = profile_tmpl.find(*i);
 491                 if(j==profile_tmpl.end())
 492                         continue;
 493
 494                 config.update(j->second);
 495         }
 496 }
 497
 498 void Builder::problem(const string &p, const string &d)
 499 {
 500         problems.push_back(Problem(p, d));
 501 }
 502
 503 void Builder::add_target(FileTarget *t)
 504 {
 505         targets.insert(TargetMap::value_type(t->get_path().str(), t));
 506         new_tgts.push_back(t);
 507 }
 508
 509 void Builder::add_target(VirtualTarget *t)
 510 {
 511         targets.insert(TargetMap::value_type(t->get_name(), t));
 512         new_tgts.push_back(t);
 513 }
 514
 515 void Builder::usage(const char *reason, const char *argv0, bool brief)
 516 {
 517         if(reason)
 518                 IO::print(IO::cerr, "%s\n", reason);
 519
 520         if(brief)
 521                 IO::print(IO::cerr, "Usage: %s\n", usagemsg);
 522         else
 523         {
 524                 IO::print(IO::cerr, "Builder 1.0\n\n");
 525                 IO::print(IO::cerr, "Usage: %s [options] [<target> ...]\n\n", argv0);
 526                 IO::print(IO::cerr, "Options:\n");
 527                 IO::print(IO::cerr, helpmsg);
 528         }
 529 }
 530
 531 FS::Path Builder::get_package_location(const string &name)
 532 {
 533         if(verbose>=3)
 534                 IO::print("Looking for package %s\n", name);
 535
 536         try
 537         {
 538                 // Try to get source directory with pkgconfig
 539                 string srcdir = strip(run_pkgconfig(name, "source"));
 540                 if(!srcdir.empty())
 541                         return srcdir;
 542         }
 543         catch(...)
 544         { }
 545
 546         if(pkg_dirs.empty())
 547         {
 548                 for(list<FS::Path>::const_iterator i=pkg_path.begin(); i!=pkg_path.end(); ++i)
 549                 {
 550                         list<string> files = list_files(*i);
 551                         for(list<string>::const_iterator j=files.begin(); j!=files.end(); ++j)
 552                         {
 553                                 FS::Path full = *i / *j;
 554                                 if(FS::exists(full/"Build"))
 555                                         pkg_dirs.push_back(full);
 556                         }
 557                 }
 558                 if(verbose>=3)
 559                         IO::print("%d packages found in path\n", pkg_dirs.size());
 560         }
 561
 562         bool msp = !name.compare(0, 3, "msp");
 563         for(list<FS::Path>::const_iterator i=pkg_dirs.begin(); i!=pkg_dirs.end(); ++i)
 564         {
 565                 string base = basename(*i);
 566                 unsigned dash = base.rfind('-');
 567
 568                 if(!base.compare(0, dash, name))
 569                         return *i;
 570                 else if(msp && !base.compare(0, dash-3, name, 3, string::npos))
 571                         return *i;
 572         }
 573
 574         return FS::Path();
 575 }
 576
 577 int Builder::load_build_file(const FS::Path &fn)
 578 {
 579         try
 580         {
 581                 IO::BufferedFile in(fn.str());
 582
 583                 if(verbose>=3)
 584                         IO::print("Reading %s\n", fn);
 585
 586                 DataFile::Parser parser(in, fn.str());
 587                 Loader loader(*this, fn.subpath(0, fn.size()-1));
 588                 loader.load(parser);
 589         }
 590         catch(const IO::FileNotFound &)
 591         {
 592                 return -1;
 593         }
 594
 595         return 0;
 596 }
 597
 598 int Builder::create_targets()
 599 {
 600         Target *world = new VirtualTarget(*this, "world");
 601
 602         Target *def_tgt = new VirtualTarget(*this, "default");
 603         world->add_depend(def_tgt);
 604
 605         Target *install = new VirtualTarget(*this, "install");
 606         world->add_depend(install);
 607
 608         Target *tarballs = new VirtualTarget(*this, "tarballs");
 609         world->add_depend(tarballs);
 610
 611         for(PackageMap::const_iterator i=packages.begin(); i!=packages.end(); ++i)
 612         {
 613                 if(!i->second || !i->second->is_configured())
 614                         continue;
 615
 616                 SourcePackage *spkg = dynamic_cast<SourcePackage *>(i->second);
 617                 if(!spkg)
 618                         continue;
 619
 620                 const ComponentList &components = spkg->get_components();
 621                 for(ComponentList::const_iterator j=components.begin(); j!=components.end(); ++j)
 622                         j->create_targets();
 623
 624                 if(spkg->get_install_flags()&(SourcePackage::LIB|SourcePackage::INCLUDE))
 625                 {
 626                         PkgConfig *pc = new PkgConfig(*this, *spkg);
 627                         install->add_depend(new Install(*this, *spkg, *pc));
 628                 }
 629         }
 630
 631         // Find dependencies until no new targets are created
 632         while(!new_tgts.empty())
 633         {
 634                 Target *tgt = new_tgts.front();
 635                 new_tgts.erase(new_tgts.begin());
 636                 tgt->find_depends();
 637                 if(!tgt->get_depends_ready())
 638                         new_tgts.push_back(tgt);
 639         }
 640
 641         // Apply what-ifs
 642         for(StringList::iterator i=what_if.begin(); i!=what_if.end(); ++i)
 643         {
 644                 FileTarget *tgt = dynamic_cast<FileTarget *>(get_target((cwd/ *i).str()));
 645                 if(!tgt)
 646                 {
 647                         IO::print(IO::cerr, "Unknown what-if target %s\n", *i);
 648                         return -1;
 649                 }
 650                 tgt->touch();
 651         }
 652
 653         // Make the cmdline target depend on all targets mentioned on the command line
 654         Target *cmdline = new VirtualTarget(*this, "cmdline");
 655         for(list<string>::iterator i=cmdline_targets.begin(); i!=cmdline_targets.end(); ++i)
 656         {
 657                 Target *tgt = get_target(*i);
 658                 if(!tgt)
 659                         tgt = get_target((cwd/ *i).str());
 660                 if(!tgt)
 661                 {
 662                         IO::print("I don't know anything about %s\n", *i);
 663                         return -1;
 664                 }
 665
 666                 cmdline->add_depend(tgt);
 667         }
 668
 669         cmdline->prepare();
 670
 671         for(PackageMap::iterator i=packages.begin(); i!=packages.end(); ++i)
 672                 if(SourcePackage *spkg = dynamic_cast<SourcePackage *>(i->second))
 673                         spkg->get_deps_cache().save();
 674
 675         return 0;
 676 }
 677
 678 Target *Builder::get_header(const FS::Path &fn)
 679 {
 680         Target *tgt = get_target(fn.str());
 681         if(tgt) return tgt;
 682
 683         if(FS::is_reg(fn))
 684         {
 685                 tgt = new SystemHeader(*this, fn.str());
 686                 return tgt;
 687         }
 688         return 0;
 689 }
 690
 691 Target *Builder::get_library(const string &lib, const FS::Path &path, LibMode mode)
 692 {
 693         // Populate a list of candidate filenames
 694         StringList candidates;
 695
 696         if(mode!=ALL_STATIC)
 697         {
 698                 // XXX Should probably let the Architecture populate the list
 699                 if(current_arch->get_system()=="windows")
 700                 {
 701                         candidates.push_back("lib"+lib+".dll");
 702                         candidates.push_back(lib+".dll");
 703                 }
 704                 else
 705                         candidates.push_back("lib"+lib+".so");
 706         }
 707
 708         /* Static libraries are always considered, since sometimes shared versions
 709         may not be available */
 710         candidates.push_back("lib"+lib+".a");
 711         if(current_arch->get_system()=="windows")
 712                 candidates.push_back("lib"+lib+".dll.a");
 713
 714         for(StringList::iterator i=candidates.begin(); i!=candidates.end(); ++i)
 715         {
 716                 string full = (path/ *i).str();
 717                 Target *tgt = get_target(full);
 718
 719                 if(tgt)
 720                 {
 721                         Target *real_tgt = tgt->get_real_target();
 722
 723                         /* Ignore dynamic libraries from local packages unless library mode is
 724                         DYNAMIC */
 725                         if(dynamic_cast<SharedLibrary *>(real_tgt) && mode!=DYNAMIC)
 726                                 continue;
 727                         else if(tgt)
 728                                 return tgt;
 729                 }
 730                 else if(FS::is_reg(full))
 731                 {
 732                         tgt = new SystemLibrary(*this, full);
 733                         return tgt;
 734                 }
 735         }
 736
 737         return 0;
 738 }
 739
 740 int Builder::do_build()
 741 {
 742         Target *cmdline = get_target("cmdline");
 743
 744         unsigned total = 0;
 745         for(map<string, Target *>::const_iterator i=targets.begin(); i!=targets.end(); ++i)
 746                 if(i->second->is_buildable() && i->second->get_rebuild())
 747                         ++total;
 748
 749         if(!total)
 750         {
 751                 IO::print("Already up to date\n");
 752                 return 0;
 753         }
 754         if(verbose>=1)
 755                 IO::print("Will build %d target%s\n", total, (total!=1 ? "s" : ""));
 756
 757         vector<Action *> actions;
 758
 759         unsigned count = 0;
 760
 761         bool fail = false;
 762         bool finish = false;
 763
 764         while(!finish)
 765         {
 766                 if(actions.size()<jobs && !fail)
 767                 {
 768                         Target *tgt = cmdline->get_buildable_target();
 769                         if(tgt)
 770                         {
 771                                 Action *action = tgt->build();
 772                                 if(action)
 773                                         actions.push_back(action);
 774
 775                                 if(show_progress)
 776                                         IO::print("%d of %d target%s built\033[1G", count, total, (total!=1 ? "s" : ""));
 777                         }
 778                         else if(actions.empty())
 779                                 finish = true;
 780                 }
 781                 else
 782                         Time::sleep(10*Time::msec);
 783
 784                 for(unsigned i=0; i<actions.size();)
 785                 {
 786                         int status = actions[i]->check();
 787                         if(status>=0)
 788                         {
 789                                 ++count;
 790
 791                                 delete actions[i];
 792                                 actions.erase(actions.begin()+i);
 793                                 if(status>0)
 794                                         fail = true;
 795                                 if(actions.empty() && fail)
 796                                         finish = true;
 797                         }
 798                         else
 799                                 ++i;
 800                 }
 801         }
 802
 803         if(show_progress)
 804                 IO::print("\033[K");
 805         if(fail)
 806                 IO::print("Build failed\n");
 807         else if(show_progress)
 808                 IO::print("Build complete\n");
 809
 810         return fail;
 811 }
 812
 813 int Builder::do_clean()
 814 {
 815         // Cleaning doesn't care about ordering, so a simpler method can be used
 816
 817         set<Target *> clean_tgts;
 818         TargetList queue;
 819         queue.push_back(get_target("cmdline"));
 820
 821         while(!queue.empty())
 822         {
 823                 Target *tgt = queue.front();
 824                 queue.erase(queue.begin());
 825
 826                 if(tgt->is_buildable() && (tgt->get_package()==main_pkg || clean>=2))
 827                         clean_tgts.insert(tgt);
 828
 829                 const TargetList &deps = tgt->get_depends();
 830                 for(TargetList::const_iterator i=deps.begin(); i!=deps.end(); ++i)
 831                         if(!clean_tgts.count(*i))
 832                                 queue.push_back(*i);
 833         }
 834
 835         for(set<Target *>::iterator i=clean_tgts.begin(); i!=clean_tgts.end(); ++i)
 836                 if(FileTarget *ft = dynamic_cast<FileTarget *>(*i))
 837                 {
 838                         Action *action = new Unlink(*this, *ft);
 839                         while(action->check()<0) ;
 840                         delete action;
 841                 }
 842
 843         return 0;
 844 }
 845
 846 void Builder::package_help()
 847 {
 848         const Config &config = main_pkg->get_config();
 849         const Config::OptionMap &options = config.get_options();
 850
 851         IO::print("Required packages:\n  ");
 852         const PackageList &requires = main_pkg->get_requires();
 853         for(PackageList::const_iterator i=requires.begin(); i!=requires.end(); ++i)
 854         {
 855                 if(i!=requires.begin())
 856                         IO::print(", ");
 857                 IO::print((*i)->get_name());
 858         }
 859         IO::print("\n\nPackage configuration:\n");
 860         for(Config::OptionMap::const_iterator i=options.begin(); i!=options.end(); ++i)
 861         {
 862                 const Config::Option &opt = i->second;
 863                 IO::print("  %s: %s (%s)", opt.name, opt.descr, opt.value);
 864                 if(opt.value!=opt.defv)
 865                         IO::print(" [%s]", opt.defv);
 866                 IO::print("\n");
 867         }
 868 }
 869
 870 Application::RegApp<Builder> Builder::reg;
 871 string Builder::usagemsg;
 872 string Builder::helpmsg;
 873
 874
 875 Builder::Loader::Loader(Builder &b, const FS::Path &s):
 876         bld(b),
 877         src(s)
 878 {
 879         add("binary_package", &Loader::binpkg);
 880         add("cross_prefix", &Loader::cross_prefix);
 881         add("profile", &Loader::profile);
 882         add("package", &Loader::package);
 883 }
 884
 885 void Builder::Loader::binpkg(const string &n)
 886 {
 887         BinaryPackage *pkg = new BinaryPackage(bld, n);
 888         load_sub(*pkg);
 889         bld.packages.insert(PackageMap::value_type(n, pkg));
 890 }
 891
 892 void Builder::Loader::cross_prefix(const string &a, const string &p)
 893 {
 894         bld.cross_prefixes[a] = p;
 895 }
 896
 897 void Builder::Loader::profile(const string &n)
 898 {
 899         StringMap prf;
 900         ProfileLoader ldr(prf);
 901         load_sub_with(ldr);
 902         bld.profile_tmpl.insert(ProfileTemplateMap::value_type(n, prf));
 903 }
 904
 905 void Builder::Loader::package(const string &n)
 906 {
 907         SourcePackage *pkg = new SourcePackage(bld, n, src);
 908         if(!bld.main_pkg)
 909                 bld.main_pkg = pkg;
 910
 911         load_sub(*pkg);
 912         bld.packages.insert(PackageMap::value_type(n, pkg));
 913 }
 914
 915
 916 Builder::ProfileLoader::ProfileLoader(StringMap &p):
 917         profile(p)
 918 {
 919         add("option", &ProfileLoader::option);
 920 }
 921
 922 void Builder::ProfileLoader::option(const string &o, const string &v)
 923 {
 924         profile.insert(StringMap::value_type(o, v));
 925 }