Support ARM hard float (arm-linux-gnueabihf).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161038 91177308-0d34-0410-b5e6-96231b3b80d8

Author: Jiangning Liu

lib/Driver/ToolChains.cpp

@@ -1103,6 +1103,9 @@ Generic_GCC::GCCInstallationDetector::GCCInstallationDetector(
     "arm-linux-gnueabi",
     "arm-linux-androideabi"
   };
+  static const char *const ARMHFTriples[] = {
+    "arm-linux-gnueabihf",
+  };
 
   static const char *const X86_64LibDirs[] = { "/lib64", "/lib" };
   static const char *const X86_64Triples[] = {
@@ -1159,8 +1162,13 @@ Generic_GCC::GCCInstallationDetector::GCCInstallationDetector(
   case llvm::Triple::arm:
   case llvm::Triple::thumb:
     LibDirs.append(ARMLibDirs, ARMLibDirs + llvm::array_lengthof(ARMLibDirs));
-    TripleAliases.append(
-      ARMTriples, ARMTriples + llvm::array_lengthof(ARMTriples));
+    if (TargetTriple.getEnvironment() == llvm::Triple::GNUEABIHF) {
+      TripleAliases.append(
+        ARMHFTriples, ARMHFTriples + llvm::array_lengthof(ARMHFTriples));
+    } else {
+      TripleAliases.append(
+        ARMTriples, ARMTriples + llvm::array_lengthof(ARMTriples));
+    }
     break;
   case llvm::Triple::x86_64:
     LibDirs.append(
@@ -1912,8 +1920,13 @@ static std::string getMultiarchTriple(const llvm::Triple TargetTriple,
     // regardless of what the actual target triple is.
   case llvm::Triple::arm:
   case llvm::Triple::thumb:
-    if (llvm::sys::fs::exists(SysRoot + "/lib/arm-linux-gnueabi"))
-      return "arm-linux-gnueabi";
+    if (TargetTriple.getEnvironment() == llvm::Triple::GNUEABIHF) {
+      if (llvm::sys::fs::exists(SysRoot + "/lib/arm-linux-gnueabihf"))
+        return "arm-linux-gnueabihf";
+    } else {
+      if (llvm::sys::fs::exists(SysRoot + "/lib/arm-linux-gnueabi"))
+        return "arm-linux-gnueabi";
+    }
     return TargetTriple.str();
   case llvm::Triple::x86:
     if (llvm::sys::fs::exists(SysRoot + "/lib/i386-linux-gnu"))
@@ -2161,6 +2174,9 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
   const StringRef ARMMultiarchIncludeDirs[] = {
     "/usr/include/arm-linux-gnueabi"
   };
+  const StringRef ARMHFMultiarchIncludeDirs[] = {
+    "/usr/include/arm-linux-gnueabihf"
+  };
   const StringRef MIPSMultiarchIncludeDirs[] = {
     "/usr/include/mips-linux-gnu"
   };
@@ -2179,7 +2195,10 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
   } else if (getTriple().getArch() == llvm::Triple::x86) {
     MultiarchIncludeDirs = X86MultiarchIncludeDirs;
   } else if (getTriple().getArch() == llvm::Triple::arm) {
-    MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
+    if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF)
+      MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs;
+    else
+      MultiarchIncludeDirs = ARMMultiarchIncludeDirs;
   } else if (getTriple().getArch() == llvm::Triple::mips) {
     MultiarchIncludeDirs = MIPSMultiarchIncludeDirs;
   } else if (getTriple().getArch() == llvm::Triple::mipsel) {

lib/Driver/Tools.cpp

@@ -629,16 +629,11 @@ static StringRef getARMFloatABI(const Driver &D,
       break;
     }
 
-    case llvm::Triple::Linux: {
-      if (Triple.getEnvironment() == llvm::Triple::GNUEABI) {
-        FloatABI = "softfp";
-        break;
-      }
-    }
-    // fall through
-
     default:
       switch(Triple.getEnvironment()) {
+      case llvm::Triple::GNUEABIHF:
+        FloatABI = "hard";
+        break;
       case llvm::Triple::GNUEABI:
         FloatABI = "softfp";
         break;
@@ -685,6 +680,7 @@ void Clang::AddARMTargetArgs(const ArgList &Args,
     switch(Triple.getEnvironment()) {
     case llvm::Triple::ANDROIDEABI:
     case llvm::Triple::GNUEABI:
+    case llvm::Triple::GNUEABIHF:
       ABIName = "aapcs-linux";
       break;
     case llvm::Triple::EABI:

test/Driver/Inputs/ubuntu_12.04_LTS_multiarch_tree/lib/.keep

@@ -174,6 +174,39 @@
 // CHECK-UBUNTU-11-04: "-L[[SYSROOT]]/lib"
 // CHECK-UBUNTU-11-04: "-L[[SYSROOT]]/usr/lib"
 //
+// Check multi arch support on Ubuntu 12.04 LTS.
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target arm-unknown-linux-gnueabihf \
+// RUN:     --sysroot=%S/Inputs/ubuntu_12.04_LTS_multiarch_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-12-04-ARM-HF %s
+// CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/../../../arm-linux-gnueabihf/crt1.o"
+// CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/../../../arm-linux-gnueabihf/crti.o"
+// CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/crtbegin.o"
+// CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabihf/4.6.3"
+// CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/../../../arm-linux-gnueabihf"
+// CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/lib/arm-linux-gnueabihf"
+// CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/usr/lib/arm-linux-gnueabihf"
+// CHECK-UBUNTU-12-04-ARM-HF: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/../../.."
+// CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/crtend.o"
+// CHECK-UBUNTU-12-04-ARM-HF: "{{.*}}/usr/lib/gcc/arm-linux-gnueabihf/4.6.3/../../../arm-linux-gnueabihf/crtn.o"
+//
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:     -target arm-unknown-linux-gnueabi \
+// RUN:     --sysroot=%S/Inputs/ubuntu_12.04_LTS_multiarch_tree \
+// RUN:   | FileCheck --check-prefix=CHECK-UBUNTU-12-04-ARM %s
+// CHECK-UBUNTU-12-04-ARM: "{{.*}}ld{{(.exe)?}}" "--sysroot=[[SYSROOT:[^"]+]]"
+// CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1/../../../arm-linux-gnueabi/crt1.o"
+// CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1/../../../arm-linux-gnueabi/crti.o"
+// CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1/crtbegin.o"
+// CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabi/4.6.1"
+// CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabi/4.6.1/../../../arm-linux-gnueabi"
+// CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/lib/arm-linux-gnueabi"
+// CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/usr/lib/arm-linux-gnueabi"
+// CHECK-UBUNTU-12-04-ARM: "-L[[SYSROOT]]/usr/lib/gcc/arm-linux-gnueabi/4.6.1/../../.."
+// CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1/crtend.o"
+// CHECK-UBUNTU-12-04-ARM: "{{.*}}/usr/lib/gcc/arm-linux-gnueabi/4.6.1/../../../arm-linux-gnueabi/crtn.o"
+//
 // Test the setup that shipped in SUSE 10.3 on ppc64.
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target powerpc64-suse-linux \