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 "externaltask.h"
  11 #include "gnucompiler.h"
  12 #include "gnulinker.h"
  13 #include "objectfile.h"
  14 #include "sharedlibrary.h"
  15 #include "sourcepackage.h"
  16 #include "staticlibrary.h"
  17
  18 using namespace std;
  19 using namespace Msp;
  20
  21 GnuLinker::GnuLinker(Builder &b, const Architecture &a):
  22         Tool(b, a, "LINK")
  23 {
  24         input_suffixes.push_back(".o");
  25         input_suffixes.push_back(".a");
  26
  27         if(architecture->is_native())
  28         {
  29                 system_path.push_back("/lib");
  30                 system_path.push_back("/usr/lib");
  31                 if(architecture->match_name("pc-32-linux"))
  32                         system_path.push_back("/usr/lib/i386-linux-gnu");
  33                 else if(architecture->match_name("pc-64-linux"))
  34                         system_path.push_back("/usr/lib/x86_64-linux-gnu");
  35         }
  36         else
  37                 system_path.push_back("/usr/"+architecture->get_cross_prefix()+"/lib");
  38
  39         default_linker = new Linker(*this, "CC");
  40         cxx_linker = new Linker(*this, "CXX");
  41 }
  42
  43 GnuLinker::~GnuLinker()
  44 {
  45         delete default_linker;
  46         delete cxx_linker;
  47 }
  48
  49 Target *GnuLinker::create_target(const list<Target *> &sources, const string &arg) const
  50 {
  51         if(sources.empty())
  52                 throw invalid_argument("GnuLinker::create_target");
  53         list<ObjectFile *> objs;
  54         Linker *linker = default_linker;
  55         for(list<Target *>::const_iterator i=sources.begin(); i!=sources.end(); ++i)
  56         {
  57                 if(ObjectFile *obj = dynamic_cast<ObjectFile *>(*i))
  58                 {
  59                         objs.push_back(obj);
  60                         if(obj->get_tool()->get_tag()=="CXX")
  61                                 linker = cxx_linker;
  62                 }
  63                 else
  64                         throw invalid_argument("GnuLinker::create_target");
  65         }
  66
  67         const Component &comp = *objs.front()->get_component();
  68         Binary *bin = 0;
  69         if(arg=="shared")
  70                 bin = new SharedLibrary(builder, comp, objs);
  71         else
  72                 bin = new Executable(builder, comp, objs);
  73         bin->set_tool(*linker);
  74         return bin;
  75 }
  76
  77 Task *GnuLinker::run(const Target &) const
  78 {
  79         throw logic_error("GnuLinker should not be run directly");
  80 }
  81
  82
  83 GnuLinker::Linker::Linker(GnuLinker &p, const string &compiler_tag):
  84         SubTool(p)
  85 {
  86         const Tool &compiler = builder.get_toolchain().get_tool(compiler_tag);
  87         if(dynamic_cast<const GnuCompiler *>(&compiler))
  88                 executable = compiler.get_executable();
  89         else
  90         {
  91                 string command;
  92                 if(compiler_tag=="CC")
  93                         command = "gcc";
  94                 else if(compiler_tag=="CXX")
  95                         command = "g++";
  96                 else
  97                         throw invalid_argument("GnuLinker::Linker::Linker");
  98                 if(architecture->is_cross())
  99                         command = format("%s-%s", architecture->get_cross_prefix(), command);
 100                 executable = builder.get_vfs().find_binary(command);
 101         }
 102 }
 103
 104 Target *GnuLinker::Linker::create_target(const list<Target *> &sources, const string &arg) const
 105 {
 106         return parent.create_target(sources, arg);
 107 }
 108
 109 string GnuLinker::Linker::create_build_signature(const BuildInfo &binfo) const
 110 {
 111         string result = FS::basename(executable->get_path());
 112         result += ',';
 113         if(binfo.libmode<=BuildInfo::STATIC)
 114                 result += 't';
 115         else
 116                 result += 'd';
 117         if(binfo.strip)
 118                 result += 's';
 119         result += ",l";
 120         result += join(binfo.libs.begin(), binfo.libs.end(), ",l");
 121         return result;
 122 }
 123
 124 Task *GnuLinker::Linker::run(const Target &target) const
 125 {
 126         const Binary &bin = dynamic_cast<const Binary &>(target);
 127
 128         vector<string> argv;
 129         argv.push_back(executable->get_path().str());
 130
 131         const Component &comp = *bin.get_component();
 132
 133         if(const SharedLibrary *shlib = dynamic_cast<const SharedLibrary *>(&bin))
 134         {
 135                 argv.push_back("-shared");
 136                 argv.push_back("-fPIC");
 137                 if(!shlib->get_soname().empty())
 138                         argv.push_back("-Wl,-soname,"+shlib->get_soname());
 139         }
 140
 141         const BuildInfo &binfo = comp.get_build_info();
 142         for(BuildInfo::PathList::const_iterator i=binfo.libpath.begin(); i!=binfo.libpath.end(); ++i)
 143                 argv.push_back("-L"+i->str());
 144         if(binfo.strip)
 145                 argv.push_back("-s");
 146         if(binfo.threads)
 147                 argv.push_back("-pthread");
 148
 149         const Architecture &native_arch = builder.get_native_arch();
 150         if(architecture->get_bits()!=native_arch.get_bits())
 151                 argv.push_back(format("-m%d", architecture->get_bits()));
 152
 153         FS::Path work_dir = comp.get_package().get_source_directory();
 154
 155         argv.push_back("-o");
 156         argv.push_back(relative(bin.get_path(), work_dir).str());
 157
 158         bool static_link_ok = (binfo.libmode<=BuildInfo::STATIC);
 159
 160         const Target::Dependencies &depends = target.get_dependencies();
 161         for(Target::Dependencies::const_iterator i=depends.begin(); i!=depends.end(); ++i)
 162         {
 163                 Target *tgt = (*i)->get_real_target();
 164
 165                 if(ObjectFile *obj = dynamic_cast<ObjectFile *>(tgt))
 166                         argv.push_back(relative(obj->get_path(), work_dir).str());
 167                 else if(StaticLibrary *stlib = dynamic_cast<StaticLibrary *>(tgt))
 168                         argv.push_back(stlib->get_path().str());
 169                 else if(SharedLibrary *shlib = dynamic_cast<SharedLibrary *>(tgt))
 170                 {
 171                         argv.push_back("-l"+shlib->get_libname());
 172                         static_link_ok = false;
 173                 }
 174         }
 175
 176         if(static_link_ok)
 177                 argv.push_back("-static");
 178         else if(architecture->get_system()=="windows")
 179                 argv.push_back("-Wl,--enable-auto-import");
 180
 181         return new ExternalTask(argv, work_dir);
 182 }