[PATCH] D35820: [Driver] Search compiler-rt paths in -print-file-name=

[Petr Hosek via Phabricator via cfe-commits]

phosek created this revision.
Herald added a subscriber: dberris.

This makes it possible to print the name of compiler-rt libraries
by using simply clang -print-file-name=libclang_rt.${runtime}-${arch}.so
same as other libraries, without having to know the details of the
resource directory organization.


Repository:
  rL LLVM

https://reviews.llvm.org/D35820

Files:
  include/clang/Driver/ToolChain.h
  lib/Driver/Driver.cpp
  lib/Driver/ToolChain.cpp


Index: lib/Driver/ToolChain.cpp
===================================================================
--- lib/Driver/ToolChain.cpp
+++ lib/Driver/ToolChain.cpp
@@ -308,6 +308,13 @@
   return TC.getArchName();
 }
 
+std::string ToolChain::getCompilerRTPath() const {
+  SmallString<128> Path(getDriver().ResourceDir);
+  StringRef OSLibName = Triple.isOSFreeBSD() ? "freebsd" : getOS();
+  llvm::sys::path::append(Path, "lib", OSLibName);
+  return Path.str();
+}
+
 std::string ToolChain::getCompilerRT(const ArgList &Args, StringRef Component,
                                      bool Shared) const {
   const llvm::Triple &TT = getTriple();
@@ -320,9 +327,7 @@
   const char *Suffix = Shared ? (Triple.isOSWindows() ? ".dll" : ".so")
                               : (IsITANMSVCWindows ? ".lib" : ".a");
 
-  SmallString<128> Path(getDriver().ResourceDir);
-  StringRef OSLibName = Triple.isOSFreeBSD() ? "freebsd" : getOS();
-  llvm::sys::path::append(Path, "lib", OSLibName);
+  SmallString<128> Path(getCompilerRTPath());
   llvm::sys::path::append(Path, Prefix + Twine("clang_rt.") + Component + "-" +
                                     Arch + Env + Suffix);
   return Path.str();
Index: lib/Driver/Driver.cpp
===================================================================
--- lib/Driver/Driver.cpp
+++ lib/Driver/Driver.cpp
@@ -3684,6 +3684,11 @@
   if (llvm::sys::fs::exists(Twine(P)))
     return P.str();
 
+  P = TC.getCompilerRTPath();
+  llvm::sys::path::append(P, Name);
+  if (llvm::sys::fs::exists(Twine(P)))
+    return P.str();
+
   for (const std::string &Dir : TC.getFilePaths()) {
     if (Dir.empty())
       continue;
Index: include/clang/Driver/ToolChain.h
===================================================================
--- include/clang/Driver/ToolChain.h
+++ include/clang/Driver/ToolChain.h
@@ -298,6 +298,8 @@
     return ToolChain::CST_Libstdcxx;
   }
 
+  virtual std::string getCompilerRTPath() const;
+
   virtual std::string getCompilerRT(const llvm::opt::ArgList &Args,
                                     StringRef Component,
                                     bool Shared = false) const;


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