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
14namespace clang {
15namespace driver {
16namespace tools {
17namespace ifstool {
18void 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
66