[clang] [SYCL][Driver] Pass -lsycl by default for SYCL compilation. (PR #174877)

[Michael Toguchi via cfe-commits]

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@@ -29,6 +29,13 @@
 // CHK-DEVICE-TRIPLE-SAME: "-O2"
 // CHK-DEVICE-TRIPLE: llvm-offload-binary{{.*}} "--image=file={{.*}}.bc,triple=spirv64-unknown-unknown,arch=generic,kind=sycl"
 
+// Check if -lsycl is passed to clang-linker-wrapper tool by default for SYCL compilation.
+// RUN: %clang -### -fsycl %s 2>&1 \
+// RUN:   | FileCheck -check-prefixes=CHECK-LSYCL,CHECK-SYCL-HEADERS-HOST,CHECK-SYCL-HEADERS-DEVICE %s
+// CHECK-SYCL-HEADERS-DEVICE: "-fsycl-is-device"{{.*}} "-internal-isystem" "{{.*}}build/bin/../include"
+// CHECK-SYCL-HEADERS-HOST: "-fsycl-is-host"{{.*}} "-internal-isystem" "{{.*}}build/bin/../include"
+// CHECK-LSYCL: clang-linker-wrapper{{.*}} "-L{{.*}}build/bin/../lib"{{.*}} "-lsycl"
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mdtoguchi wrote:

Is the `build/bin` directory guaranteed, or is the `build` directory just a build setting that can be changed?  Maybe just `bin/../include` and `bin/../lib` would be better here.

https://github.com/llvm/llvm-project/pull/174877