clang/lib/Driver/ToolChains/InterfaceStubs.cpp

   1 //===---  InterfaceStubs.cpp - Base InterfaceStubs 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 "InterfaceStubs.h"
  10 #include "CommonArgs.h"
  11 #include "clang/Driver/Compilation.h"
  12 #include "llvm/Support/Path.h"
  13
  14 namespace clang {
  15 namespace driver {
  16 namespace tools {
  17 namespace ifstool {
  18 void Merger::ConstructJob(Compilation &C, const JobAction &JA,
  19                           const InputInfo &Output, const InputInfoList &Inputs,
  20                           const llvm::opt::ArgList &Args,
  21                           const char *LinkingOutput) const {
  22   std::string Merger = getToolChain().GetProgramPath(getShortName());
  23   // TODO: Use IFS library directly in the future.
  24   llvm::opt::ArgStringList CmdArgs;
  25   CmdArgs.push_back("--input-format=IFS");
  26   const bool WriteBin = !Args.getLastArg(options::OPT_emit_merged_ifs);
  27   CmdArgs.push_back(WriteBin ? "--output-format=ELF" : "--output-format=IFS");
  28   CmdArgs.push_back("-o");
  29
  30   // Normally we want to write to a side-car file ending in ".ifso" so for
  31   // example if `clang -emit-interface-stubs -shared -o libhello.so` were
  32   // invoked then we would like to get libhello.so and libhello.ifso. If the
  33   // stdout stream is given as the output file (ie `-o -`), that is the one
  34   // exception where we will just append to the same filestream as the normal
  35   // output.
  36   SmallString<128> OutputFilename(Output.getFilename());
  37   if (OutputFilename != "-") {
  38     if (Args.hasArg(options::OPT_shared))
  39       llvm::sys::path::replace_extension(OutputFilename,
  40                                          (WriteBin ? "ifso" : "ifs"));
  41     else
  42       OutputFilename += (WriteBin ? ".ifso" : ".ifs");
  43   }
  44
  45   CmdArgs.push_back(Args.MakeArgString(OutputFilename.c_str()));
  46
  47   // Here we append the input files. If the input files are object files, then
  48   // we look for .ifs files present in the same location as the object files.
  49   for (const auto &Input : Inputs) {
  50     if (!Input.isFilename())
  51       continue;
  52     SmallString<128> InputFilename(Input.getFilename());
  53     if (Input.getType() == types::TY_Object)
  54       llvm::sys::path::replace_extension(InputFilename, ".ifs");
  55     CmdArgs.push_back(Args.MakeArgString(InputFilename.c_str()));
  56   }
  57
  58   C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
  59                                          Args.MakeArgString(Merger), CmdArgs,
  60                                          Inputs, Output));
  61 }
  62 } // namespace ifstool
  63 } // namespace tools
  64 } // namespace driver
  65 } // namespace clang