diff options
Diffstat (limited to 'llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp')
| -rw-r--r-- | llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp | 26 |
1 files changed, 21 insertions, 5 deletions
diff --git a/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp b/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp index 8f69282..7ecde3c 100644 --- a/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp +++ b/llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp @@ -229,10 +229,11 @@ static void appendFile(std::vector<NewArchiveMember> &Members, (Magic == file_magic::coff_object) ? getCOFFFileMachine(MB) : getBitcodeFileMachine(MB); if (!MaybeFileMachine) { - handleAllErrors(MaybeFileMachine.takeError(), [&](const ErrorInfoBase &EIB) { - llvm::errs() << MB.getBufferIdentifier() << ": " << EIB.message() - << "\n"; - }); + handleAllErrors(MaybeFileMachine.takeError(), + [&](const ErrorInfoBase &EIB) { + llvm::errs() << MB.getBufferIdentifier() << ": " + << EIB.message() << "\n"; + }); exit(1); } COFF::MachineTypes FileMachine = *MaybeFileMachine; @@ -291,10 +292,25 @@ int llvm::libDriverMain(ArrayRef<const char *> ArgsArr) { return 0; } + // Parse /ignore: + llvm::StringSet<> IgnoredWarnings; + for (auto *Arg : Args.filtered(OPT_ignore)) + IgnoredWarnings.insert(Arg->getValue()); + // If no input files and not told otherwise, silently do nothing to match // lib.exe - if (!Args.hasArgNoClaim(OPT_INPUT) && !Args.hasArg(OPT_llvmlibempty)) + if (!Args.hasArgNoClaim(OPT_INPUT) && !Args.hasArg(OPT_llvmlibempty)) { + if (!IgnoredWarnings.contains("emptyoutput")) { + llvm::errs() << "warning: no input files, not writing output file\n"; + llvm::errs() << " pass /llvmlibempty to write empty .lib file,\n"; + llvm::errs() << " pass /ignore:emptyoutput to suppress warning\n"; + if (Args.hasFlag(OPT_WX, OPT_WX_no, false)) { + llvm::errs() << "treating warning as error due to /WX\n"; + return 1; + } + } return 0; + } if (Args.hasArg(OPT_lst)) { doList(Args); |