Driver/Darwin: Change where Darwin computes the host version, to normalize tool

chain construction.

llvm-svn: 110028

clang/lib/Driver/HostInfo.cpp

@@ -38,9 +38,6 @@ namespace {
 
 /// DarwinHostInfo - Darwin host information implementation.
 class DarwinHostInfo : public HostInfo {
-  /// Darwin version of host.
-  unsigned DarwinVersion[3];
-
   /// Cache of tool chains we have created.
   mutable llvm::DenseMap<unsigned, ToolChain*> ToolChains;
 
@@ -56,15 +53,6 @@ public:
 
 DarwinHostInfo::DarwinHostInfo(const Driver &D, const llvm::Triple& Triple)
   : HostInfo(D, Triple) {
-
-  assert(Triple.getArch() != llvm::Triple::UnknownArch && "Invalid arch!");
-  assert(memcmp(&getOSName()[0], "darwin", 6) == 0 &&
-         "Unknown Darwin platform.");
-  bool HadExtra;
-  if (!Driver::GetReleaseVersion(&getOSName()[6],
-                                 DarwinVersion[0], DarwinVersion[1],
-                                 DarwinVersion[2], HadExtra))
-    D.Diag(clang::diag::err_drv_invalid_darwin_version) << getOSName();
 }
 
 DarwinHostInfo::~DarwinHostInfo() {
@@ -128,10 +116,10 @@ ToolChain *DarwinHostInfo::CreateToolChain(const ArgList &Args,
     const char *UseNewToolChain = ::getenv("CCC_ENABLE_NEW_DARWIN_TOOLCHAIN");
     if (UseNewToolChain || 
         Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb) {
-      TC = new toolchains::DarwinClang(*this, TCTriple, DarwinVersion);
+      TC = new toolchains::DarwinClang(*this, TCTriple);
     } else if (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64) {
       // We still use the legacy DarwinGCC toolchain on X86.
-      TC = new toolchains::DarwinGCC(*this, TCTriple, DarwinVersion);
+      TC = new toolchains::DarwinGCC(*this, TCTriple);
     } else
       TC = new toolchains::Darwin_Generic_GCC(*this, TCTriple);
   }

clang/lib/Driver/ToolChains.cpp

@@ -31,13 +31,20 @@ using namespace clang::driver::toolchains;
 
 /// Darwin - Darwin tool chain for i386 and x86_64.
 
-Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple,
-               const unsigned (&_DarwinVersion)[3])
+Darwin::Darwin(const HostInfo &Host, const llvm::Triple& Triple)
   : ToolChain(Host, Triple), TargetInitialized(false)
 {
+  // Compute the initial Darwin version based on the host.
+  bool HadExtra;
+  std::string OSName = Triple.getOSName();
+  if (!Driver::GetReleaseVersion(&OSName[6],
+                                 DarwinVersion[0], DarwinVersion[1],
+                                 DarwinVersion[2], HadExtra))
+    getDriver().Diag(clang::diag::err_drv_invalid_darwin_version) << OSName;
+
   llvm::raw_string_ostream(MacosxVersionMin)
-    << "10." << std::max(0, (int)_DarwinVersion[0] - 4) << '.'
-    << _DarwinVersion[1];
+    << "10." << std::max(0, (int)DarwinVersion[0] - 4) << '.'
+    << DarwinVersion[1];
 }
 
 types::ID Darwin::LookupTypeForExtension(const char *Ext) const {
@@ -113,9 +120,8 @@ llvm::StringRef Darwin::getDarwinArchName(const ArgList &Args) const {
   }
 }
 
-DarwinGCC::DarwinGCC(const HostInfo &Host, const llvm::Triple& Triple,
-                     const unsigned (&DarwinVersion)[3])
-  : Darwin(Host, Triple, DarwinVersion)
+DarwinGCC::DarwinGCC(const HostInfo &Host, const llvm::Triple& Triple)
+  : Darwin(Host, Triple)
 {
   // We can only work with 4.2.1 currently.
   GCCVersion[0] = 4;
@@ -326,9 +332,8 @@ void DarwinGCC::AddLinkRuntimeLibArgs(const ArgList &Args,
   }
 }
 
-DarwinClang::DarwinClang(const HostInfo &Host, const llvm::Triple& Triple,
-                         const unsigned (&DarwinVersion)[3])
-  : Darwin(Host, Triple, DarwinVersion)
+DarwinClang::DarwinClang(const HostInfo &Host, const llvm::Triple& Triple)
+  : Darwin(Host, Triple)
 {
   // We expect 'as', 'ld', etc. to be adjacent to our install dir.
   getProgramPaths().push_back(getDriver().getInstalledDir());

clang/lib/Driver/ToolChains.h

@@ -42,6 +42,11 @@ public:
 
 /// Darwin - The base Darwin tool chain.
 class LLVM_LIBRARY_VISIBILITY Darwin : public ToolChain {
+public:
+  /// The host version.
+  unsigned DarwinVersion[3];
+
+private:
   mutable llvm::DenseMap<unsigned, Tool*> Tools;
 
   /// Whether the information on the target has been initialized.
@@ -65,8 +70,7 @@ private:
   void AddDeploymentTarget(DerivedArgList &Args) const;
 
 public:
-  Darwin(const HostInfo &Host, const llvm::Triple& Triple,
-         const unsigned (&DarwinVersion)[3]);
+  Darwin(const HostInfo &Host, const llvm::Triple& Triple);
   ~Darwin();
 
   /// @name Darwin Specific Toolchain API
@@ -204,8 +208,7 @@ public:
 /// DarwinClang - The Darwin toolchain used by Clang.
 class LLVM_LIBRARY_VISIBILITY DarwinClang : public Darwin {
 public:
-  DarwinClang(const HostInfo &Host, const llvm::Triple& Triple,
-              const unsigned (&DarwinVersion)[3]);
+  DarwinClang(const HostInfo &Host, const llvm::Triple& Triple);
 
   /// @name Darwin ToolChain Implementation
   /// {
@@ -228,8 +231,7 @@ class LLVM_LIBRARY_VISIBILITY DarwinGCC : public Darwin {
   std::string ToolChainDir;
 
 public:
-  DarwinGCC(const HostInfo &Host, const llvm::Triple& Triple,
-            const unsigned (&DarwinVersion)[3]);
+  DarwinGCC(const HostInfo &Host, const llvm::Triple& Triple);
 
   /// @name Darwin ToolChain Implementation
   /// {