DragonFly.cpp revision 360784 
1//===--- DragonFly.cpp - DragonFly ToolChain Implementations ----*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "DragonFly.h"
10#include "CommonArgs.h"
11#include "clang/Driver/Compilation.h"
12#include "clang/Driver/Driver.h"
13#include "clang/Driver/Options.h"
14#include "llvm/Option/ArgList.h"
15
16using namespace clang::driver;
17using namespace clang::driver::tools;
18using namespace clang::driver::toolchains;
19using namespace clang;
20using namespace llvm::opt;
21
22/// DragonFly Tools
23
24// For now, DragonFly Assemble does just about the same as for
25// FreeBSD, but this may change soon.
26void dragonfly::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
27                                        const InputInfo &Output,
28                                        const InputInfoList &Inputs,
29                                        const ArgList &Args,
30                                        const char *LinkingOutput) const {
31  claimNoWarnArgs(Args);
32  ArgStringList CmdArgs;
33
34  // When building 32-bit code on DragonFly/pc64, we have to explicitly
35  // instruct as in the base system to assemble 32-bit code.
36  if (getToolChain().getArch() == llvm::Triple::x86)
37    CmdArgs.push_back("--32");
38
39  Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
40
41  CmdArgs.push_back("-o");
42  CmdArgs.push_back(Output.getFilename());
43
44  for (const auto &II : Inputs)
45    CmdArgs.push_back(II.getFilename());
46
47  const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
48  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
49}
50
51void dragonfly::Linker::ConstructJob(Compilation &C, const JobAction &JA,
52                                     const InputInfo &Output,
53                                     const InputInfoList &Inputs,
54                                     const ArgList &Args,
55                                     const char *LinkingOutput) const {
56  const Driver &D = getToolChain().getDriver();
57  ArgStringList CmdArgs;
58
59  if (!D.SysRoot.empty())
60    CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
61
62  CmdArgs.push_back("--eh-frame-hdr");
63  if (Args.hasArg(options::OPT_static)) {
64    CmdArgs.push_back("-Bstatic");
65  } else {
66    if (Args.hasArg(options::OPT_rdynamic))
67      CmdArgs.push_back("-export-dynamic");
68    if (Args.hasArg(options::OPT_shared))
69      CmdArgs.push_back("-Bshareable");
70    else {
71      CmdArgs.push_back("-dynamic-linker");
72      CmdArgs.push_back("/usr/libexec/ld-elf.so.2");
73    }
74    CmdArgs.push_back("--hash-style=gnu");
75    CmdArgs.push_back("--enable-new-dtags");
76  }
77
78  // When building 32-bit code on DragonFly/pc64, we have to explicitly
79  // instruct ld in the base system to link 32-bit code.
80  if (getToolChain().getArch() == llvm::Triple::x86) {
81    CmdArgs.push_back("-m");
82    CmdArgs.push_back("elf_i386");
83  }
84
85  if (Output.isFilename()) {
86    CmdArgs.push_back("-o");
87    CmdArgs.push_back(Output.getFilename());
88  } else {
89    assert(Output.isNothing() && "Invalid output.");
90  }
91
92  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
93    if (!Args.hasArg(options::OPT_shared)) {
94      if (Args.hasArg(options::OPT_pg))
95        CmdArgs.push_back(
96            Args.MakeArgString(getToolChain().GetFilePath("gcrt1.o")));
97      else {
98        if (Args.hasArg(options::OPT_pie))
99          CmdArgs.push_back(
100              Args.MakeArgString(getToolChain().GetFilePath("Scrt1.o")));
101        else
102          CmdArgs.push_back(
103              Args.MakeArgString(getToolChain().GetFilePath("crt1.o")));
104      }
105    }
106    CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crti.o")));
107    if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
108      CmdArgs.push_back(
109          Args.MakeArgString(getToolChain().GetFilePath("crtbeginS.o")));
110    else
111      CmdArgs.push_back(
112          Args.MakeArgString(getToolChain().GetFilePath("crtbegin.o")));
113  }
114
115  Args.AddAllArgs(CmdArgs,
116                  {options::OPT_L, options::OPT_T_Group, options::OPT_e});
117
118  AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
119
120  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
121    CmdArgs.push_back("-L/usr/lib/gcc50");
122
123    if (!Args.hasArg(options::OPT_static)) {
124      CmdArgs.push_back("-rpath");
125      CmdArgs.push_back("/usr/lib/gcc50");
126    }
127
128    if (D.CCCIsCXX()) {
129      if (getToolChain().ShouldLinkCXXStdlib(Args))
130        getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
131      CmdArgs.push_back("-lm");
132    }
133
134    if (Args.hasArg(options::OPT_pthread))
135      CmdArgs.push_back("-lpthread");
136
137    if (!Args.hasArg(options::OPT_nolibc)) {
138      CmdArgs.push_back("-lc");
139    }
140
141    if (Args.hasArg(options::OPT_static) ||
142        Args.hasArg(options::OPT_static_libgcc)) {
143        CmdArgs.push_back("-lgcc");
144        CmdArgs.push_back("-lgcc_eh");
145    } else {
146      if (Args.hasArg(options::OPT_shared_libgcc)) {
147          CmdArgs.push_back("-lgcc_pic");
148          if (!Args.hasArg(options::OPT_shared))
149            CmdArgs.push_back("-lgcc");
150      } else {
151          CmdArgs.push_back("-lgcc");
152          CmdArgs.push_back("--as-needed");
153          CmdArgs.push_back("-lgcc_pic");
154          CmdArgs.push_back("--no-as-needed");
155      }
156    }
157  }
158
159  if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
160    if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
161      CmdArgs.push_back(
162          Args.MakeArgString(getToolChain().GetFilePath("crtendS.o")));
163    else
164      CmdArgs.push_back(
165          Args.MakeArgString(getToolChain().GetFilePath("crtend.o")));
166    CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crtn.o")));
167  }
168
169  getToolChain().addProfileRTLibs(Args, CmdArgs);
170
171  const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
172  C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
173}
174
175/// DragonFly - DragonFly tool chain which can call as(1) and ld(1) directly.
176
177DragonFly::DragonFly(const Driver &D, const llvm::Triple &Triple,
178                     const ArgList &Args)
179    : Generic_ELF(D, Triple, Args) {
180
181  // Path mangling to find libexec
182  getProgramPaths().push_back(getDriver().getInstalledDir());
183  if (getDriver().getInstalledDir() != getDriver().Dir)
184    getProgramPaths().push_back(getDriver().Dir);
185
186  getFilePaths().push_back(getDriver().Dir + "/../lib");
187  getFilePaths().push_back("/usr/lib");
188  getFilePaths().push_back("/usr/lib/gcc50");
189}
190
191Tool *DragonFly::buildAssembler() const {
192  return new tools::dragonfly::Assembler(*this);
193}
194
195Tool *DragonFly::buildLinker() const {
196  return new tools::dragonfly::Linker(*this);
197}
198