Driver/Darwin: The -arch argument values aren't exactly the arch names from a

triple.

 - Translate the special case of powerpc to its expected -arch name.

llvm-svn: 167571

clang/include/clang/Driver/ToolChain.h

@@ -85,6 +85,10 @@ public:
   StringRef getPlatform() const { return Triple.getVendorName(); }
   StringRef getOS() const { return Triple.getOSName(); }
 
+  /// \brief Provide the default architecture name (as expected by -arch) for
+  /// this toolchain. Note t
+  std::string getDefaultUniversalArchName() const;
+
   std::string getTripleString() const {
     return Triple.getTriple();
   }

clang/lib/Driver/Driver.cpp

@@ -806,7 +806,7 @@ void Driver::BuildUniversalActions(const ToolChain &TC,
   // When there is no explicit arch for this platform, make sure we still bind
   // the architecture (to the default) so that -Xarch_ is handled correctly.
   if (!Archs.size())
-    Archs.push_back(Args.MakeArgString(TC.getArchName()));
+    Archs.push_back(Args.MakeArgString(TC.getDefaultUniversalArchName()));
 
   // FIXME: We killed off some others but these aren't yet detected in a
   // functional manner. If we added information to jobs about which "auxiliary"

clang/lib/Driver/ToolChain.cpp

@@ -33,6 +33,21 @@ const Driver &ToolChain::getDriver() const {
  return D;
 }
 
+std::string ToolChain::getDefaultUniversalArchName() const {
+  // In universal driver terms, the arch name accepted by -arch isn't exactly
+  // the same as the ones that appear in the triple. Roughly speaking, this is
+  // an inverse of the darwin::getArchTypeForDarwinArchName() function, but the
+  // only interesting special case is powerpc.
+  switch (Triple.getArch()) {
+  case llvm::Triple::ppc:
+    return "ppc";
+  case llvm::Triple::ppc64:
+    return "ppc64";
+  default:
+    return Triple.getArchName();
+  }
+}
+
 bool ToolChain::IsUnwindTablesDefault() const {
   return false;
 }

clang/test/Driver/darwin-arch-default.c

@@ -0,0 +1,7 @@
+// Check that the name of the arch we bind is "ppc" not "powerpc".
+//
+// RUN: %clang -target powerpc-apple-darwin8 -### \
+// RUN:   -ccc-print-phases %s 2> %t
+// RUN: FileCheck --check-prefix=CHECK-POWERPC < %t %s
+//
+// CHECK-POWERPC: bind-arch, "ppc"