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
66