BareMetal: Auto-detect IAR toolchain for Renesas 78K architecture

This patch implements auto-detection for the 78K toolchain,
provided by IAR Systems:

 * https://www.iar.com/iar-embedded-workbench/#!?architecture=78K

Change-Id: Idef5e8982984c0cf24c120d31af0f6cee210694b
Reviewed-by: hjk <hjk@qt.io>

src/plugins/baremetal/iarewtoolchain.cpp

@@ -75,7 +75,7 @@ static QString cppLanguageOption(const FilePath &compiler)
     }
     if (baseName == "icc8051" || baseName == "iccavr"
             || baseName == "iccstm8" || baseName == "icc430"
-            || baseName == "iccv850") {
+            || baseName == "iccv850" || baseName == "icc78k") {
         return QString("--ec++");
     }
     return {};
@@ -206,6 +206,8 @@ static Abi::Architecture guessArchitecture(const Macros &macros)
             return Abi::Architecture::Rh850Architecture;
         if (macro.key == "__ICCRX__")
             return Abi::Architecture::RxArchitecture;
+        if (macro.key == "__ICC78K__")
+            return Abi::Architecture::K78Architecture;
     }
     return Abi::Architecture::UnknownArchitecture;
 }
@@ -232,7 +234,8 @@ static Abi::BinaryFormat guessFormat(Abi::Architecture arch)
     if (arch == Abi::Architecture::Mcs51Architecture
             || arch == Abi::Architecture::AvrArchitecture
             || arch == Abi::Architecture::Msp430Architecture
-            || arch == Abi::Architecture::V850Architecture) {
+            || arch == Abi::Architecture::V850Architecture
+            || arch == Abi::Architecture::K78Architecture) {
         return Abi::BinaryFormat::UbrofFormat;
     }
     return Abi::BinaryFormat::UnknownFormat;
@@ -461,6 +464,7 @@ QList<ToolChain *> IarToolChainFactory::autoDetect(const QList<ToolChain *> &alr
         {{"EWV850"}, {"\\v850\\bin\\iccv850.exe"}},
         {{"EWRH850"}, {"\\rh850\\bin\\iccrh850.exe"}},
         {{"EWRX"}, {"\\rx\\bin\\iccrx.exe"}},
+        {{"EW78K"}, {"\\78k\\bin\\icc78k.exe"}},
     };
 
     QSettings registry(kRegistryNode, QSettings::NativeFormat);

src/plugins/projectexplorer/abi.cpp

@@ -731,6 +731,8 @@ QString Abi::toString(const Architecture &a)
         return QLatin1String("rh850");
     case RxArchitecture:
         return QLatin1String("rx");
+    case K78Architecture:
+        return QLatin1String("78k");
     case UnknownArchitecture:
         Q_FALLTHROUGH();
     default:
@@ -883,6 +885,8 @@ Abi::Architecture Abi::architectureFromString(const QStringRef &a)
         return Rh850Architecture;
     if (a == "rx")
         return RxArchitecture;
+    if (a == "78k")
+        return K78Architecture;
     else if (a == "xtensa")
         return XtensaArchitecture;
     if (a == "asmjs")

src/plugins/projectexplorer/abi.h

@@ -67,6 +67,7 @@ public:
         V850Architecture,
         Rh850Architecture,
         RxArchitecture,
+        K78Architecture,
         UnknownArchitecture
     };