[clang] [llvm] [libsycl][Driver] Move and rename the SYCL shared library (PR #188770)
Sergey Semenov via cfe-commits
cfe-commits at lists.llvm.org
Fri Apr 17 04:27:27 PDT 2026
https://github.com/sergey-semenov updated https://github.com/llvm/llvm-project/pull/188770
>From e484402a777e7b66d355034e387939cd28089f74 Mon Sep 17 00:00:00 2001
From: Sergey Semenov <sergey.semenov at intel.com>
Date: Thu, 26 Mar 2026 05:35:19 -0700
Subject: [PATCH 1/5] [libsycl] Move and rename the shared library
Align the shared library with other runtime libraries:
- Rename from libsycl.so to libLLVMSYCL.so
- Make build dir independent from LLVM_ENABLE_PER_TARGET_RUNTIME_DIR
and install dir dependent on it.
---
libsycl/CMakeLists.txt | 15 ++++++++-------
libsycl/src/CMakeLists.txt | 4 ++--
libsycl/tools/sycl-ls/CMakeLists.txt | 2 +-
3 files changed, 11 insertions(+), 10 deletions(-)
diff --git a/libsycl/CMakeLists.txt b/libsycl/CMakeLists.txt
index f75216978f69a..8a414b1730c6a 100644
--- a/libsycl/CMakeLists.txt
+++ b/libsycl/CMakeLists.txt
@@ -37,22 +37,23 @@ option(LIBSYCL_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
+
+if(LLVM_LIBRARY_OUTPUT_INTDIR)
+ set(LIBSYCL_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+else()
+ set(LIBSYCL_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBSYCL_LIBDIR_SUFFIX})
+endif()
+
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(LIBSYCL_TARGET_SUBDIR ${LLVM_DEFAULT_TARGET_TRIPLE})
if(LIBSYCL_LIBDIR_SUBDIR)
string(APPEND LIBSYCL_TARGET_SUBDIR /${LIBSYCL_LIBDIR_SUBDIR})
endif()
cmake_path(NORMAL_PATH LIBSYCL_TARGET_SUBDIR)
- set(LIBSYCL_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LIBSYCL_TARGET_SUBDIR})
set(LIBSYCL_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LIBSYCL_TARGET_SUBDIR} CACHE STRING
"Path where built libsycl libraries should be installed.")
unset(LIBSYCL_TARGET_SUBDIR)
else()
- if(LLVM_LIBRARY_OUTPUT_INTDIR)
- set(LIBSYCL_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
- else()
- set(LIBSYCL_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBSYCL_LIBDIR_SUFFIX})
- endif()
set(LIBSYCL_INSTALL_LIBRARY_DIR lib${LIBSYCL_LIBDIR_SUFFIX} CACHE STRING
"Path where built libsycl libraries should be installed.")
endif()
@@ -115,7 +116,7 @@ add_custom_command(
install(DIRECTORY "${LIBSYCL_SOURCE_INCLUDE_DIR}/sycl" DESTINATION ${LIBSYCL_INCLUDE_DIR} COMPONENT sycl-headers)
install(DIRECTORY "${LIBSYCL_SOURCE_INCLUDE_DIR}/CL" DESTINATION ${LIBSYCL_INCLUDE_DIR} COMPONENT sycl-headers)
-set(LIBSYCL_LIB_NAME "sycl")
+set(LIBSYCL_LIB_NAME "LLVMSYCL")
set(LIBSYCL_SHARED_OUTPUT_NAME "${LIBSYCL_LIB_NAME}")
if (CMAKE_SYSTEM_NAME STREQUAL Windows)
if (CMAKE_MSVC_RUNTIME_LIBRARY AND (NOT CMAKE_MSVC_RUNTIME_LIBRARY MATCHES "DLL$"))
diff --git a/libsycl/src/CMakeLists.txt b/libsycl/src/CMakeLists.txt
index 67ba7d28968de..c7d078d2322ae 100644
--- a/libsycl/src/CMakeLists.txt
+++ b/libsycl/src/CMakeLists.txt
@@ -105,6 +105,6 @@ add_sycl_rt_library(${LIBSYCL_LIB_NAME}
${LIBSYCL_SOURCES})
install(TARGETS ${LIBSYCL_RT_LIBS}
- ARCHIVE DESTINATION "lib${LLVM_LIBDIR_SUFFIX}" COMPONENT libsycl
- LIBRARY DESTINATION "lib${LLVM_LIBDIR_SUFFIX}" COMPONENT libsycl
+ ARCHIVE DESTINATION ${LIBSYCL_INSTALL_LIBRARY_DIR} COMPONENT libsycl
+ LIBRARY DESTINATION ${LIBSYCL_INSTALL_LIBRARY_DIR} COMPONENT libsycl
RUNTIME DESTINATION "bin" COMPONENT libsycl)
diff --git a/libsycl/tools/sycl-ls/CMakeLists.txt b/libsycl/tools/sycl-ls/CMakeLists.txt
index 82eb3e644e5b1..e34ba77c88c37 100644
--- a/libsycl/tools/sycl-ls/CMakeLists.txt
+++ b/libsycl/tools/sycl-ls/CMakeLists.txt
@@ -3,7 +3,7 @@ add_executable(sycl-ls sycl-ls.cpp)
target_include_directories(sycl-ls SYSTEM PRIVATE ${LLVM_MAIN_INCLUDE_DIR})
target_link_libraries(sycl-ls PRIVATE LLVMSupport LLVMObject)
-add_dependencies(sycl-ls sycl)
+add_dependencies(sycl-ls ${LIBSYCL_LIB_NAME})
target_include_directories(sycl-ls PRIVATE ${LIBSYCL_BUILD_INCLUDE_DIR})
target_link_libraries(sycl-ls
>From 38c27457c68fc0bbc4bbafdd0adc3ff1bc673939 Mon Sep 17 00:00:00 2001
From: Sergey Semenov <sergey.semenov at intel.com>
Date: Fri, 27 Mar 2026 07:47:11 -0700
Subject: [PATCH 2/5] Update lit.cfg.py
---
libsycl/test/lit.cfg.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libsycl/test/lit.cfg.py b/libsycl/test/lit.cfg.py
index 67ab5d2e83294..377be90791ef0 100644
--- a/libsycl/test/lit.cfg.py
+++ b/libsycl/test/lit.cfg.py
@@ -117,7 +117,7 @@ def __exit__(self, exc_type, exc_value, exc_traceback):
config.substitutions.append(
(
"%sycl_options",
- " -lsycl"
+ " -lLLVMSYCL"
+ " -isystem "
+ config.libsycl_include
+ " -isystem "
>From 3bd99fbd9da547c7ad85ed07fc0cf0b0f9335fd2 Mon Sep 17 00:00:00 2001
From: Sergey Semenov <sergey.semenov at intel.com>
Date: Fri, 27 Mar 2026 09:39:11 -0700
Subject: [PATCH 3/5] Revert build dir change
---
libsycl/CMakeLists.txt | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/libsycl/CMakeLists.txt b/libsycl/CMakeLists.txt
index 8a414b1730c6a..6f55838c7b2e3 100644
--- a/libsycl/CMakeLists.txt
+++ b/libsycl/CMakeLists.txt
@@ -37,23 +37,22 @@ option(LIBSYCL_ENABLE_PEDANTIC "Compile with pedantic enabled." OFF)
set_property(GLOBAL PROPERTY USE_FOLDERS ON)
-
-if(LLVM_LIBRARY_OUTPUT_INTDIR)
- set(LIBSYCL_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
-else()
- set(LIBSYCL_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBSYCL_LIBDIR_SUFFIX})
-endif()
-
if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
set(LIBSYCL_TARGET_SUBDIR ${LLVM_DEFAULT_TARGET_TRIPLE})
if(LIBSYCL_LIBDIR_SUBDIR)
string(APPEND LIBSYCL_TARGET_SUBDIR /${LIBSYCL_LIBDIR_SUBDIR})
endif()
cmake_path(NORMAL_PATH LIBSYCL_TARGET_SUBDIR)
+ set(LIBSYCL_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR}/${LIBSYCL_TARGET_SUBDIR})
set(LIBSYCL_INSTALL_LIBRARY_DIR lib${LLVM_LIBDIR_SUFFIX}/${LIBSYCL_TARGET_SUBDIR} CACHE STRING
"Path where built libsycl libraries should be installed.")
unset(LIBSYCL_TARGET_SUBDIR)
else()
+ if(LLVM_LIBRARY_OUTPUT_INTDIR)
+ set(LIBSYCL_LIBRARY_DIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
+ else()
+ set(LIBSYCL_LIBRARY_DIR ${CMAKE_BINARY_DIR}/lib${LIBSYCL_LIBDIR_SUFFIX})
+ endif()
set(LIBSYCL_INSTALL_LIBRARY_DIR lib${LIBSYCL_LIBDIR_SUFFIX} CACHE STRING
"Path where built libsycl libraries should be installed.")
endif()
>From 4209b1b826c9d392193c6728ba9f33341ab388c9 Mon Sep 17 00:00:00 2001
From: Srividya Sundaram <srividya.sundaram at intel.com>
Date: Tue, 31 Mar 2026 11:43:07 -0700
Subject: [PATCH 4/5] [Driver] Update SYCL runtime library name and path for
target-specific directories (#189053)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
This patch updates the Clang driver to support the renamed SYCL runtime
library (libsycl.so → libLLVMSYCL.so) and its new location in
target-specific directories. These changes align with PR
#[188770](https://github.com/llvm/llvm-project/pull/188770), which
standardizes the SYCL runtime library naming and directory structure to
match other LLVM runtime libraries.
**Changes**
**Library Naming**
- **Old**: libsycl.so
- **New**: libLLVMSYCL.so
**Directory Structure**
Both build and install directories now use target-specific
subdirectories:
- **Old:** lib/libsycl.so
- **New:** lib/target-triple/libLLVMSYCL.so
For example, on x86_64-unknown-linux-gnu:
- **Old**: build/lib/libsycl.so → install/lib/libsycl.so
- **New**: build/lib/x86_64-unknown-linux-gnu/libLLVMSYCL.so →
install/lib/x86_64-unknown-linux-gnu/libLLVMSYCL.so
---
clang/include/clang/Driver/SyclInstallationDetector.h | 4 ++--
clang/lib/Driver/ToolChains/Linux.cpp | 3 ++-
clang/lib/Driver/ToolChains/SYCL.cpp | 10 ++++++----
.../Driver/Inputs/SYCL/{libsycl.ll => libLLVMSYCL.ll} | 0
clang/test/Driver/link-device-code.test | 4 ++--
clang/test/Driver/sycl-offload-jit.cpp | 4 ++--
6 files changed, 14 insertions(+), 11 deletions(-)
rename clang/test/Driver/Inputs/SYCL/{libsycl.ll => libLLVMSYCL.ll} (100%)
diff --git a/clang/include/clang/Driver/SyclInstallationDetector.h b/clang/include/clang/Driver/SyclInstallationDetector.h
index f92228817f045..5f40294c026d7 100644
--- a/clang/include/clang/Driver/SyclInstallationDetector.h
+++ b/clang/include/clang/Driver/SyclInstallationDetector.h
@@ -22,8 +22,8 @@ class SYCLInstallationDetector {
void addSYCLIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const;
- // Return the filesystem path to the SYCL runtime library (libsycl.so), that
- // was detected.
+ // Return the filesystem path to the SYCL runtime library (libLLVMSYCL.so),
+ // that was detected.
StringRef getSYCLRTLibPath() const { return SYCLRTLibPath; }
private:
diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index bde99a3dac860..cf67f984ccdd2 100644
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -865,7 +865,8 @@ void Linux::addOffloadRTLibs(unsigned ActiveKinds, const ArgList &Args,
if (ActiveKinds & Action::OFK_HIP)
Libraries.emplace_back(RocmInstallation->getLibPath(), "libamdhip64.so");
else if (ActiveKinds & Action::OFK_SYCL)
- Libraries.emplace_back(SYCLInstallation->getSYCLRTLibPath(), "libsycl.so");
+ Libraries.emplace_back(SYCLInstallation->getSYCLRTLibPath(),
+ "libLLVMSYCL.so");
for (auto [Path, Library] : Libraries) {
if (Args.hasFlag(options::OPT_frtlib_add_rpath,
diff --git a/clang/lib/Driver/ToolChains/SYCL.cpp b/clang/lib/Driver/ToolChains/SYCL.cpp
index 033fd98183737..53bfdfe4316ae 100644
--- a/clang/lib/Driver/ToolChains/SYCL.cpp
+++ b/clang/lib/Driver/ToolChains/SYCL.cpp
@@ -19,15 +19,17 @@ SYCLInstallationDetector::SYCLInstallationDetector(
const Driver &D, const llvm::Triple &HostTriple,
const llvm::opt::ArgList &Args)
: D(D) {
- // Detect the presence of the SYCL runtime library (libsycl.so) in the
+ // Detect the presence of the SYCL runtime library (libLLVMSYCL.so) in the
// filesystem. This is used to determine whether a usable SYCL installation
// is available for the current driver invocation.
StringRef SysRoot = D.SysRoot;
SmallString<128> DriverDir(D.Dir);
+ SmallString<128> LibPath(DriverDir);
+ llvm::sys::path::append(LibPath, "..", "lib", HostTriple.str(),
+ "libLLVMSYCL.so");
if (DriverDir.starts_with(SysRoot) &&
- (Args.hasArg(options::OPT_fsycl) ||
- D.getVFS().exists(DriverDir + "/../lib/libsycl.so"))) {
- llvm::sys::path::append(DriverDir, "..", "lib");
+ (Args.hasArg(options::OPT_fsycl) || D.getVFS().exists(LibPath))) {
+ llvm::sys::path::append(DriverDir, "..", "lib", HostTriple.str());
SYCLRTLibPath = DriverDir;
}
}
diff --git a/clang/test/Driver/Inputs/SYCL/libsycl.ll b/clang/test/Driver/Inputs/SYCL/libLLVMSYCL.ll
similarity index 100%
rename from clang/test/Driver/Inputs/SYCL/libsycl.ll
rename to clang/test/Driver/Inputs/SYCL/libLLVMSYCL.ll
diff --git a/clang/test/Driver/link-device-code.test b/clang/test/Driver/link-device-code.test
index 231f02b6560e0..eb75eaf1fe5c2 100644
--- a/clang/test/Driver/link-device-code.test
+++ b/clang/test/Driver/link-device-code.test
@@ -3,12 +3,12 @@
# RUN: llvm-as %S/Inputs/SYCL/foo.ll -o %t.foo.bc
# RUN: llvm-as %S/Inputs/SYCL/bar.ll -o %t.bar.bc
# RUN: llvm-as %S/Inputs/SYCL/baz.ll -o %t.baz.bc
-# RUN: llvm-as %S/Inputs/SYCL/libsycl.ll -o %t.libsycl.bc
+# RUN: llvm-as %S/Inputs/SYCL/libLLVMSYCL.ll -o %t.libLLVMSYCL.bc
# RUN: clang-sycl-linker %t.foo.bc %t.bar.bc -triple=spirv64 --dry-run -o a.spv --print-linked-module 2>&1 | FileCheck %s --check-prefix=CHECK-SIMPLE
# RUN: not clang-sycl-linker %t.bar.bc %t.baz.bc -triple=spirv64 --dry-run -o a.spv --print-linked-module 2>&1 | FileCheck %s --check-prefix=CHECK-MULTIPLE-DEFS
-# RUN: clang-sycl-linker %t.foo.bc %t.bar.bc -device-libs=%t.libsycl.bc -library-path= -triple=spirv64 --dry-run -o a.spv --print-linked-module 2>&1 | FileCheck %s --check-prefix=CHECK-DEVICE-LIB
+# RUN: clang-sycl-linker %t.foo.bc %t.bar.bc -device-libs=%t.libLLVMSYCL.bc -library-path= -triple=spirv64 --dry-run -o a.spv --print-linked-module 2>&1 | FileCheck %s --check-prefix=CHECK-DEVICE-LIB
; CHECK-SIMPLE: define {{.*}}foo_func1{{.*}}
; CHECK-SIMPLE: define {{.*}}foo_func2{{.*}}
diff --git a/clang/test/Driver/sycl-offload-jit.cpp b/clang/test/Driver/sycl-offload-jit.cpp
index 5bdb56d935a98..e9b821597f804 100644
--- a/clang/test/Driver/sycl-offload-jit.cpp
+++ b/clang/test/Driver/sycl-offload-jit.cpp
@@ -29,13 +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 path to libsycl.so is passed to clang-linker-wrapper tool by default for SYCL compilation.
+// Check if path to libLLVMSYCL.so is passed to clang-linker-wrapper tool by default for SYCL compilation.
// The test also checks if SYCL header include paths are added to the SYCL host and device compilation.
// RUN: %clang -### --target=x86_64-unknown-linux-gnu -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" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
// CHECK-SYCL-HEADERS-HOST: "-fsycl-is-host"{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
-// CHECK-LSYCL: clang-linker-wrapper{{.*}} "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}lib{{[/\\]+}}libsycl.so"
+// CHECK-LSYCL: clang-linker-wrapper{{.*}} "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}lib{{[/\\]+}}x86_64-unknown-linux-gnu{{[/\\]+}}libLLVMSYCL.so"
/// Check -fsycl-is-device is passed when compiling for the device.
/// Check -fsycl-is-host is passed when compiling for host.
>From 0e135d42961a1993e1048d553db409c75a63322a Mon Sep 17 00:00:00 2001
From: srividya sundaram <srividya.sundaram at intel.com>
Date: Wed, 15 Apr 2026 12:18:16 -0700
Subject: [PATCH 5/5] Add logic for LLVM_ENABLE_PER_TARGET_RUNTIME_DIR
---
.../clang/Driver/SyclInstallationDetector.h | 2 +-
clang/lib/Driver/ToolChains/SYCL.cpp | 19 +++++++++++---
clang/test/Driver/sycl-offload-jit.cpp | 25 +++++++++++++++++--
3 files changed, 40 insertions(+), 6 deletions(-)
diff --git a/clang/include/clang/Driver/SyclInstallationDetector.h b/clang/include/clang/Driver/SyclInstallationDetector.h
index 5f40294c026d7..8763c7047a49b 100644
--- a/clang/include/clang/Driver/SyclInstallationDetector.h
+++ b/clang/include/clang/Driver/SyclInstallationDetector.h
@@ -22,7 +22,7 @@ class SYCLInstallationDetector {
void addSYCLIncludeArgs(const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const;
- // Return the filesystem path to the SYCL runtime library (libLLVMSYCL.so),
+ // Return the filesystem path to the SYCL runtime library,
// that was detected.
StringRef getSYCLRTLibPath() const { return SYCLRTLibPath; }
diff --git a/clang/lib/Driver/ToolChains/SYCL.cpp b/clang/lib/Driver/ToolChains/SYCL.cpp
index 53bfdfe4316ae..d4d12356263b6 100644
--- a/clang/lib/Driver/ToolChains/SYCL.cpp
+++ b/clang/lib/Driver/ToolChains/SYCL.cpp
@@ -19,7 +19,7 @@ SYCLInstallationDetector::SYCLInstallationDetector(
const Driver &D, const llvm::Triple &HostTriple,
const llvm::opt::ArgList &Args)
: D(D) {
- // Detect the presence of the SYCL runtime library (libLLVMSYCL.so) in the
+ // Detect the presence of the SYCL runtime library in the
// filesystem. This is used to determine whether a usable SYCL installation
// is available for the current driver invocation.
StringRef SysRoot = D.SysRoot;
@@ -27,9 +27,22 @@ SYCLInstallationDetector::SYCLInstallationDetector(
SmallString<128> LibPath(DriverDir);
llvm::sys::path::append(LibPath, "..", "lib", HostTriple.str(),
"libLLVMSYCL.so");
+ // Flat lib path for LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF builds,
+ // where the library is installed directly in lib/ with no triple subdir.
+ SmallString<128> FlatLibPath(DriverDir);
+ llvm::sys::path::append(FlatLibPath, "..", "lib", "libLLVMSYCL.so");
+
if (DriverDir.starts_with(SysRoot) &&
- (Args.hasArg(options::OPT_fsycl) || D.getVFS().exists(LibPath))) {
- llvm::sys::path::append(DriverDir, "..", "lib", HostTriple.str());
+ Args.hasFlag(options::OPT_fsycl, options::OPT_fno_sycl, false)) {
+ if (D.getVFS().exists(LibPath))
+ // LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON: library is in lib/<triple>/
+ llvm::sys::path::append(DriverDir, "..", "lib", HostTriple.str());
+ else if (D.getVFS().exists(FlatLibPath))
+ // LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF: library is in lib/
+ llvm::sys::path::append(DriverDir, "..", "lib");
+ else
+ // Neither path exists — broken install, leave SYCLRTLibPath unset
+ return;
SYCLRTLibPath = DriverDir;
}
}
diff --git a/clang/test/Driver/sycl-offload-jit.cpp b/clang/test/Driver/sycl-offload-jit.cpp
index e9b821597f804..d221770bb3870 100644
--- a/clang/test/Driver/sycl-offload-jit.cpp
+++ b/clang/test/Driver/sycl-offload-jit.cpp
@@ -29,14 +29,35 @@
// CHK-DEVICE-TRIPLE-SAME: "-O2"
// CHK-DEVICE-TRIPLE: llvm-offload-binary{{.*}} "--image=file={{.*}}.bc,triple=spirv64-unknown-unknown,arch=generic,kind=sycl"
-// Check if path to libLLVMSYCL.so is passed to clang-linker-wrapper tool by default for SYCL compilation.
+// Check if path to the SYCL RT is passed to clang-linker-wrapper for SYCL compilation.
// The test also checks if SYCL header include paths are added to the SYCL host and device compilation.
-// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fsycl %s 2>&1 \
+// These tests require a fake install tree with a symlinked clang so that D.Dir points to a
+// controlled location, allowing us to place a dummy libLLVMSYCL.so where the driver expects it.
+// UNSUPPORTED: system-windows, system-cygwin
+
+// Check LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=ON case: library is in lib/<triple>/
+// RUN: rm -rf %t && mkdir -p %t/bin %t/lib/x86_64-unknown-linux-gnu
+// RUN: touch %t/lib/x86_64-unknown-linux-gnu/libLLVMSYCL.so
+// RUN: ln -s %clang %t/bin/clang
+// RUN: %t/bin/clang -### -no-canonical-prefixes --target=x86_64-unknown-linux-gnu -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" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
// CHECK-SYCL-HEADERS-HOST: "-fsycl-is-host"{{.*}} "-internal-isystem" "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}include"
// CHECK-LSYCL: clang-linker-wrapper{{.*}} "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}lib{{[/\\]+}}x86_64-unknown-linux-gnu{{[/\\]+}}libLLVMSYCL.so"
+// Check LLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF case: library is in lib/ (no triple subdir)
+// RUN: rm -rf %t && mkdir -p %t/bin %t/lib
+// RUN: touch %t/lib/libLLVMSYCL.so
+// RUN: ln -s %clang %t/bin/clang
+// RUN: %t/bin/clang -### -no-canonical-prefixes --target=x86_64-unknown-linux-gnu -fsycl %s 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-LSYCL-FLAT %s
+// CHECK-LSYCL-FLAT: clang-linker-wrapper{{.*}} "{{.*}}bin{{[/\\]+}}..{{[/\\]+}}lib{{[/\\]+}}libLLVMSYCL.so"
+
+// Check that -fsycl -fno-sycl does not pass libLLVMSYCL.so to the linker.
+// RUN: %clang -### --target=x86_64-unknown-linux-gnu -fsycl -fno-sycl %s 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-NO-SYCL-RT %s
+// CHECK-NO-SYCL-RT-NOT: libLLVMSYCL.so
+
/// Check -fsycl-is-device is passed when compiling for the device.
/// Check -fsycl-is-host is passed when compiling for host.
// RUN: %clang -### -fsycl -c %s 2>&1 \
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