[PATCH] D33302: Don't output a PDB unless /DEBUG is specified

[Zachary Turner via Phabricator via llvm-commits]

zturner added a comment.

Yes, MSVC ignores `/pdb` option if you don't pass `/DEBUG`.

  D:\src\llvmbuild\pdbtest>cl /c /Z7 hello.cpp
  Microsoft (R) C/C++ Optimizing Compiler Version 19.10.25019 for x86
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  hello.cpp
  C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\xlocale(314): warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
  C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\include\exception(366): warning C4577: 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc
  
  D:\src\llvmbuild\pdbtest>link /out:hello.exe /pdb:hello.pdb hello.obj
  Microsoft (R) Incremental Linker Version 14.10.25019.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  
  D:\src\llvmbuild\pdbtest>dir hello*
   Volume in drive D is New Volume
   Volume Serial Number is 2EC5-6F01
  
   Directory of D:\src\llvmbuild\pdbtest
  
  05/17/2017  04:05 PM                92 hello.cpp
  05/17/2017  04:06 PM           183,296 hello.exe
  05/17/2017  04:05 PM           334,693 hello.obj
                 3 File(s)        518,081 bytes
                 0 Dir(s)  129,495,351,296 bytes free
  
  D:\src\llvmbuild\pdbtest>link /debug /out:hello.exe /pdb:hello.pdb hello.obj
  Microsoft (R) Incremental Linker Version 14.10.25019.0
  Copyright (C) Microsoft Corporation.  All rights reserved.
  
  
  D:\src\llvmbuild\pdbtest>dir hello*
   Volume in drive D is New Volume
   Volume Serial Number is 2EC5-6F01
  
   Directory of D:\src\llvmbuild\pdbtest
  
  05/17/2017  04:05 PM                92 hello.cpp
  05/17/2017  04:06 PM           756,224 hello.exe
  05/17/2017  04:06 PM         3,284,272 hello.ilk
  05/17/2017  04:05 PM           334,693 hello.obj
  05/17/2017  04:06 PM         8,048,640 hello.pdb
                 5 File(s)     12,423,921 bytes
                 0 Dir(s)  129,483,444,224 bytes free


https://reviews.llvm.org/D33302