source/gnulinker.cpp

   1 #include <stdexcept>
   2 #include <vector>
   3 #include <msp/fs/dir.h>
   4 #include <msp/fs/utils.h>
   5 #include <msp/strings/format.h>
   6 #include <msp/strings/utils.h>
   7 #include "builder.h"
   8 #include "component.h"
   9 #include "executable.h"
  10 #include "exportdefinitions.h"
  11 #include "externaltask.h"
  12 #include "gnucompiler.h"
  13 #include "gnulinker.h"
  14 #include "importlibrary.h"
  15 #include "installedfile.h"
  16 #include "objectfile.h"
  17 #include "sharedlibrary.h"
  18 #include "sourcepackage.h"
  19 #include "staticlibrary.h"
  20
  21 using namespace std;
  22 using namespace Msp;
  23
  24 GnuLinker::GnuLinker(Builder &b, const Architecture &a):
  25         Tool(b, a, "LINK")
  26 {
  27         input_suffixes.push_back(".o");
  28         input_suffixes.push_back(".a");
  29
  30         processing_unit = COMPONENT;
  31
  32         default_linker = new Linker(*this, "CC");
  33         cxx_linker = new Linker(*this, "CXX");
  34 }
  35
  36 GnuLinker::~GnuLinker()
  37 {
  38         delete default_linker;
  39         delete cxx_linker;
  40 }
  41
  42 Target *GnuLinker::create_target(const vector<Target *> &sources, const string &arg)
  43 {
  44         if(sources.empty())
  45                 throw invalid_argument("GnuLinker::create_target");
  46         vector<ObjectFile *> objs;
  47         objs.reserve(sources.size());
  48         Linker *linker = default_linker;
  49         for(Target *s: sources)
  50         {
  51                 ObjectFile &obj = dynamic_cast<ObjectFile &>(*s);
  52                 objs.push_back(&obj);
  53                 if(obj.get_tool()->get_tag()=="CXX")
  54                         linker = cxx_linker;
  55         }
  56
  57         const Component &comp = *objs.front()->get_component();
  58         Binary *bin = 0;
  59         if(arg=="shared")
  60         {
  61                 SharedLibrary *shlib = new SharedLibrary(builder, comp, objs);
  62                 if(architecture->get_system()=="windows")
  63                 {
  64                         Tool &dlltool = builder.get_toolchain().get_tool("DLL");
  65                         dlltool.create_target(*shlib);
  66                 }
  67                 bin = shlib;
  68         }
  69         else
  70                 bin = new Executable(builder, comp, objs);
  71         bin->set_tool(*linker);
  72         return bin;
  73 }
  74
  75 Target *GnuLinker::create_install(Target &target) const
  76 {
  77         if(SharedLibrary *shlib = dynamic_cast<SharedLibrary *>(&target))
  78         {
  79                 Tool &copy = builder.get_toolchain().get_tool("CP");
  80                 InstalledFile *inst_tgt = dynamic_cast<InstalledFile *>(copy.create_target(target));
  81                 if(architecture->get_system()=="windows")
  82                         builder.get_build_graph().add_installed_target(*shlib->get_import_library());
  83                 else
  84                 {
  85                         string link_name = architecture->create_filename<SharedLibrary>(shlib->get_libname());
  86                         if(link_name!=FS::basename(inst_tgt->get_path()))
  87                                 inst_tgt->set_symlink(link_name);
  88                 }
  89                 return inst_tgt;
  90         }
  91         else
  92                 return 0;
  93 }
  94
  95 void GnuLinker::do_prepare()
  96 {
  97         bool path_found = false;
  98         const FS::Path &sysroot = build_info.sysroot;
  99
 100         Tool &compiler = builder.get_toolchain().get_tool("CC");
 101         if(dynamic_cast<GnuCompiler *>(&compiler))
 102         {
 103                 compiler.prepare();
 104                 FileTarget *compiler_exe = compiler.get_executable();
 105                 if(compiler_exe)
 106                 {
 107                         ExternalTask::Arguments argv;
 108                         argv.push_back(compiler_exe->get_path().str());
 109                         argv.push_back("-Wl,--verbose");
 110                         argv.push_back("-nostdlib");
 111                         if(!sysroot.empty())
 112                                 argv.push_back("--sysroot="+sysroot.str());
 113
 114                         builder.get_logger().log("auxcommands", format("Running %s", join(argv.begin(), argv.end())));
 115                         try
 116                         {
 117                                 string output = ExternalTask::run_and_capture_output(argv, FS::Path(), true);
 118                                 string::size_type start = 0;
 119                                 while(start<output.size())
 120                                 {
 121                                         string::size_type search_dir = output.find("SEARCH_DIR(\"", start);
 122                                         if(search_dir==string::npos)
 123                                                 break;
 124
 125                                         search_dir += 12;
 126                                         string::size_type end = output.find("\");", search_dir);
 127                                         if(end==string::npos)
 128                                                 break;
 129
 130                                         FS::Path path;
 131                                         if(!output.compare(search_dir, 2, "=/"))
 132                                         {
 133                                                 search_dir += 2;
 134                                                 if(sysroot.empty())
 135                                                         path = "/";
 136                                                 else
 137                                                         path = sysroot;
 138                                         }
 139
 140                                         path /= output.substr(search_dir, end-search_dir);
 141                                         builder.get_logger().log("tools", format("Got %s system path: %s", tag, path));
 142                                         system_path.push_back(path);
 143                                         path_found = true;
 144
 145                                         start = end+3;
 146                                 }
 147                         }
 148                         catch(...)
 149                         { }
 150                 }
 151         }
 152
 153         if(!path_found)
 154         {
 155                 builder.get_logger().log("tools", format("No %s system path found, using defaults", tag));
 156                 if(!sysroot.empty())
 157                         system_path.push_back(sysroot/"usr/lib");
 158                 else if(architecture->is_native())
 159                 {
 160                         system_path.push_back("/lib");
 161                         system_path.push_back("/usr/lib");
 162                         if(architecture->match_name("pc-32-linux"))
 163                         {
 164                                 system_path.push_back("/lib/i386-linux-gnu");
 165                                 system_path.push_back("/usr/lib/i386-linux-gnu");
 166                         }
 167                         else if(architecture->match_name("pc-64-linux"))
 168                         {
 169                                 system_path.push_back("/lib/x86_64-linux-gnu");
 170                                 system_path.push_back("/usr/lib/x86_64-linux-gnu");
 171                         }
 172                 }
 173                 else
 174                         system_path.push_back(format("/usr/%s/lib", architecture->get_cross_prefix()));
 175         }
 176 }
 177
 178 Task *GnuLinker::run(const Target &) const
 179 {
 180         throw logic_error("GnuLinker should not be run directly");
 181 }
 182
 183
 184 GnuLinker::Linker::Linker(GnuLinker &p, const string &ct):
 185         SubTool(p),
 186         compiler_tag(ct)
 187 {
 188         if(compiler_tag=="CC")
 189                 set_command("gcc", true);
 190         else if(compiler_tag=="CXX")
 191                 set_command("g++", true);
 192         else
 193                 throw invalid_argument("GnuLinker::Linker::Linker");
 194 }
 195
 196 string GnuLinker::Linker::create_build_signature(const BuildInfo &binfo) const
 197 {
 198         string result = Tool::create_build_signature(binfo);
 199         result += ',';
 200         if(binfo.libmode<=BuildInfo::STATIC)
 201                 result += 't';
 202         else
 203                 result += 'd';
 204         if(binfo.strip)
 205                 result += 's';
 206         if(!binfo.libs.empty())
 207         {
 208                 result += ",l";
 209                 result += join(binfo.libs.begin(), binfo.libs.end(), ",l");
 210         }
 211         return result;
 212 }
 213
 214 void GnuLinker::Linker::do_prepare()
 215 {
 216         parent.prepare();
 217         build_info = parent.get_build_info();
 218         system_path = parent.get_system_path();
 219
 220         Tool &compiler = builder.get_toolchain().get_tool(compiler_tag);
 221         if(dynamic_cast<GnuCompiler *>(&compiler))
 222         {
 223                 compiler.prepare();
 224                 executable = compiler.get_executable();
 225         }
 226 }
 227
 228 Task *GnuLinker::Linker::run(const Target &target) const
 229 {
 230         const Binary &bin = dynamic_cast<const Binary &>(target);
 231
 232         ExternalTask::Arguments argv;
 233         argv.push_back(executable->get_path().str());
 234
 235         FS::Path work_dir = bin.get_component()->get_package().get_source_directory();
 236
 237         if(const SharedLibrary *shlib = dynamic_cast<const SharedLibrary *>(&bin))
 238         {
 239                 argv.push_back("-shared");
 240                 argv.push_back("-fPIC");
 241                 if(architecture->get_system()!="windows" && !shlib->get_soname().empty())
 242                 {
 243                         if(architecture->get_system()=="darwin")
 244                         {
 245                                 argv.push_back("-install_name");
 246                                 argv.push_back(shlib->get_soname());
 247
 248                                 const string &ver = shlib->get_package()->get_version();
 249                                 const string &if_ver = shlib->get_package()->get_interface_version();
 250                                 if(!ver.empty() && !if_ver.empty())
 251                                 {
 252                                         argv.push_back("-current_version");
 253                                         argv.push_back(ver);
 254                                         argv.push_back("-compatibility_version");
 255                                         argv.push_back(if_ver);
 256                                 }
 257                         }
 258                         else
 259                                 argv.push_back("-Wl,-soname,"+shlib->get_soname());
 260                 }
 261         }
 262
 263         BuildInfo binfo;
 264         target.collect_build_info(binfo);
 265
 266         const FS::Path &sysroot = binfo.sysroot;
 267         if(!sysroot.empty())
 268                 argv.push_back("--sysroot="+sysroot.str());
 269
 270         FS::Path lib_dir = builder.get_prefix()/"lib";
 271         if(binfo.rpath_mode==BuildInfo::ABSOLUTE)
 272                 argv.push_back("-Wl,-rpath,"+lib_dir.str());
 273         else
 274         {
 275                 if(binfo.rpath_mode==BuildInfo::RELATIVE)
 276                         argv.push_back("-Wl,-rpath,$ORIGIN/../lib");
 277                 argv.push_back("-Wl,-rpath-link,"+lib_dir.str());
 278         }
 279
 280         for(const FS::Path &p: binfo.libpath)
 281                 argv.push_back("-L"+p.str());
 282         if(binfo.strip)
 283                 argv.push_back("-s");
 284         if(binfo.threads && architecture->get_system()!="windows" && architecture->get_system()!="darwin")
 285                 argv.push_back("-pthread");
 286
 287         const Architecture &native_arch = builder.get_native_arch();
 288         if(architecture->is_native() && architecture->get_bits()!=native_arch.get_bits())
 289                 argv.push_back(format("-m%d", architecture->get_bits()));
 290
 291         argv.push_back("-o");
 292         argv.push_back(relative(bin.get_path(), work_dir).str());
 293
 294         for(const string &s: binfo.keep_symbols)
 295                 argv.push_back("-u"+s);
 296
 297         bool static_link_ok = (binfo.libmode<=BuildInfo::STATIC);
 298
 299         for(Target *d: target.get_dependencies())
 300         {
 301                 FileTarget *file = dynamic_cast<FileTarget *>(d);
 302                 Target *tgt = d->get_real_target();
 303
 304                 if(ObjectFile *obj = dynamic_cast<ObjectFile *>(tgt))
 305                         argv.push_back(relative(obj->get_path(), work_dir).str());
 306                 else if(StaticLibrary *stlib = dynamic_cast<StaticLibrary *>(tgt))
 307                         argv.push_back((file?file:stlib)->get_path().str());
 308                 else if(SharedLibrary *shlib = dynamic_cast<SharedLibrary *>(tgt))
 309                 {
 310                         argv.push_back("-l"+shlib->get_libname());
 311                         static_link_ok = false;
 312                 }
 313                 else if(ImportLibrary *imp = dynamic_cast<ImportLibrary *>(tgt))
 314                 {
 315                         shlib = imp->get_shared_library();
 316                         if(shlib)
 317                                 argv.push_back("-l"+shlib->get_libname());
 318                         else
 319                                 argv.push_back((file?file:imp)->get_path().str());
 320                         static_link_ok = false;
 321                 }
 322         }
 323
 324         for(const string &l: binfo.libs)
 325                 if(l.size()>10 && !l.compare(l.size()-10, 10, ".framework"))
 326                 {
 327                         argv.push_back("-framework");
 328                         argv.push_back(l.substr(0, l.size()-10));
 329                 }
 330
 331         if(static_link_ok)
 332                 argv.push_back("-static");
 333         else
 334         {
 335                 if(compiler_tag=="CXX")
 336                 {
 337                         auto i = binfo.libmodes.find("stdc++");
 338                         if(i!=binfo.libmodes.end() && i->second<=BuildInfo::STATIC)
 339                                 argv.push_back("-static-libstdc++");
 340                 }
 341
 342                 if(architecture->get_system()=="windows")
 343                         argv.push_back("-Wl,--enable-auto-import");
 344         }
 345
 346         return new ExternalTask(argv, work_dir);
 347 }