[PATCH] D89702: [clang] [msvc] Automatically link against oldnames just as linking against libcmt

[Martin Storsjö via Phabricator via cfe-commits]

mstorsjo created this revision.
mstorsjo added reviewers: rnk, amccarth.
Herald added a project: clang.
mstorsjo requested review of this revision.

If invoking clang-cl, both libcmt (or another lib, depending on the /M[TD](|d) options) and oldnames are passed as dependent libs. If compiling and linking via the clang driver, we used to just pass libcmt when linking; include oldnames consistently there.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D89702

Files:
  clang/lib/Driver/ToolChains/MSVC.cpp
  clang/test/Driver/msvc-link.c


Index: clang/test/Driver/msvc-link.c
===================================================================
--- clang/test/Driver/msvc-link.c
+++ clang/test/Driver/msvc-link.c
@@ -2,6 +2,7 @@
 // BASIC: link.exe"
 // BASIC: "-out:a.exe"
 // BASIC: "-defaultlib:libcmt"
+// BASIC: "-defaultlib:oldnames"
 // BASIC: "-nologo"
 // BASIC-NOT: "-Brepro"
 
@@ -9,6 +10,7 @@
 // DLL: link.exe"
 // DLL: "-out:a.dll"
 // DLL: "-defaultlib:libcmt"
+// DLL: "-defaultlib:oldnames"
 // DLL: "-nologo"
 // DLL: "-dll"
 
Index: clang/lib/Driver/ToolChains/MSVC.cpp
===================================================================
--- clang/lib/Driver/ToolChains/MSVC.cpp
+++ clang/lib/Driver/ToolChains/MSVC.cpp
@@ -333,8 +333,10 @@
         Args.MakeArgString(std::string("-out:") + Output.getFilename()));
 
   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles) &&
-      !C.getDriver().IsCLMode())
+      !C.getDriver().IsCLMode()) {
     CmdArgs.push_back("-defaultlib:libcmt");
+    CmdArgs.push_back("-defaultlib:oldnames");
+  }
 
   if (!llvm::sys::Process::GetEnv("LIB")) {
     // If the VC environment hasn't been configured (perhaps because the user


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