Turn on unnamed lambda by default

Author: jtmott-intel

clang/include/clang/Basic/LangOptions.def

@@ -247,7 +247,7 @@ LANGOPT(SYCLIsDevice      , 1, 0, "Generate code for SYCL device")
 LANGOPT(SYCLIsHost        , 1, 0, "SYCL host compilation")
 LANGOPT(SYCLAllowFuncPtr  , 1, 0, "Allow function pointers in SYCL device code")
 LANGOPT(SYCLStdLayoutKernelParams, 1, 0, "Enable standard layout requirement for SYCL kernel parameters")
-LANGOPT(SYCLUnnamedLambda , 1, 0, "Allow unnamed lambda SYCL kernels")
+LANGOPT(SYCLUnnamedLambda , 1, 1, "Allow unnamed lambda SYCL kernels")
 LANGOPT(SYCLVersion       , 32, 0, "Version of the SYCL standard used")
 LANGOPT(DeclareSPIRVBuiltins, 1, 0, "Declare SPIR-V builtin functions")
 LANGOPT(SYCLExplicitSIMD  , 1, 0, "SYCL compilation with explicit SIMD extension")

clang/lib/Driver/ToolChains/Clang.cpp

@@ -6198,8 +6198,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
       HeaderOpt += Output.getFilename();
       CmdArgs.push_back(Args.MakeArgString(HeaderOpt));
     }
-    if (Args.hasArg(options::OPT_fsycl_unnamed_lambda))
-      CmdArgs.push_back("-fsycl-unnamed-lambda");
+    CmdArgs.push_back("-fsycl-unnamed-lambda");
 
     // Enable generation of USM address spaces as opt-in.
     // __ENABLE_USM_ADDR_SPACE__ will be used during compilation of SYCL headers