Fix build on Windows and export only pi* symbols in libpi_level0.so

Align with changes made for OpenCL plugin in
intel#1638:

* Fix build on Windows by defining __SYCL_BUILD_SYCL_DLL in cmake file
* Export only pi* symbols in libpi_level0.so
* Add test to check exported symbols

Signed-off-by: Artur Gainullin <artur.gainullin@intel.com>

Author: againull

sycl/plugins/Intel_level0/CMakeLists.txt

@@ -46,6 +46,26 @@ add_library(pi_level0 SHARED
   "${CMAKE_CURRENT_SOURCE_DIR}/pi_level0.hpp"
 )
 
+if (MSVC)
+  # by defining __SYCL_BUILD_SYCL_DLL, we can use __declspec(dllexport)
+  # which are individually tagged for all pi* symbols in pi.h
+  target_compile_definitions(pi_level0 PRIVATE __SYCL_BUILD_SYCL_DLL)
+else()
+  # we set the visibility of all symbols 'hidden' by default.
+  # In pi.h file, we set exported symbols with visibility==default individually
+  target_compile_options(pi_level0 PUBLIC -fvisibility=hidden)
+
+  # This script file is used to allow exporting pi* symbols only.
+  # All other symbols are regarded as local (hidden)
+  set(linker_script "${CMAKE_CURRENT_SOURCE_DIR}/../ld-version-script.txt")
+
+  # Filter symbols based on the scope defined in the script file,
+  # and export pi* function symbols in the library.
+  target_link_libraries( pi_level0
+    PRIVATE "-Wl,--version-script=${linker_script}"
+  )
+endif()
+
 add_dependencies(pi_level0 l0-loader)
 add_dependencies(sycl-toolchain pi_level0)
 

sycl/test/abi/pi_level0_symbol_check.dump

@@ -0,0 +1,101 @@
+# RUN: env LLVM_BIN_PATH=%llvm_build_bin_dir python %sycl_tools_src_dir/abi_check.py --mode check_symbols --reference %s %sycl_libs_dir/libpi_level0.so
+# REQUIRES: linux
+
+piDeviceGetInfo
+piextContextGetNativeHandle
+piEnqueueMemImageWrite
+piEnqueueMemBufferWrite
+piextUSMFree
+piEnqueueNativeKernel
+piProgramRetain
+piProgramGetBuildInfo
+piextUSMEnqueueMemAdvise
+piKernelCreate
+piKernelGetSubGroupInfo
+piextUSMEnqueueMemset
+piSamplerRetain
+piEventRelease
+piextDeviceCreateWithNativeHandle
+piEventSetCallback
+piSamplerRelease
+piextMemCreateWithNativeHandle
+piEventRetain
+piProgramLink
+piextUSMSharedAlloc
+piContextCreate
+piSamplerGetInfo
+piEnqueueMemImageCopy
+piextMemGetNativeHandle
+piEnqueueMemBufferMap
+piPluginInit
+piextQueueCreateWithNativeHandle
+piContextRelease
+piextProgramCreateWithNativeHandle
+piMemBufferCreate
+piextUSMGetMemAllocInfo
+piDevicesGet
+piKernelRetain
+piSamplerCreate
+piEnqueueMemBufferRead
+piPlatformGetInfo
+piContextRetain
+piextDeviceSelectBinary
+piEnqueueMemImageFill
+piDeviceRelease
+piQueueFinish
+piKernelRelease
+piMemImageCreate
+piProgramCompile
+piMemGetInfo
+piextProgramSetSpecializationConstant
+piextQueueGetNativeHandle
+piEnqueueMemImageRead
+piextUSMEnqueueMemcpy
+piProgramCreate
+piextContextSetExtendedDeleter
+piProgramBuild
+piKernelSetExecInfo
+piPlatformsGet
+piEnqueueMemBufferFill
+piMemRetain
+piextUSMEnqueuePrefetch
+piextKernelSetArgPointer
+piEnqueueEventsWait
+piEnqueueMemBufferCopy
+piQueueGetInfo
+piDevicePartition
+piQueueRetain
+piextDeviceGetNativeHandle
+piEventGetInfo
+piMemImageGetInfo
+piContextGetInfo
+piclProgramCreateWithSource
+piextProgramGetNativeHandle
+piEventGetProfilingInfo
+piProgramGetInfo
+piextGetDeviceFunctionPointer
+piEnqueueMemUnmap
+piextKernelSetArgMemObj
+piQueueCreate
+piEventCreate
+piKernelGetInfo
+piQueueRelease
+piKernelSetArg
+piEnqueueMemBufferCopyRect
+piEnqueueKernelLaunch
+piextContextCreateWithNativeHandle
+piclProgramCreateWithBinary
+piKernelGetGroupInfo
+piextEventCreateWithNativeHandle
+piEventsWait
+piMemRelease
+piProgramRelease
+piDeviceRetain
+piextUSMDeviceAlloc
+piEventSetStatus
+piextEventGetNativeHandle
+piEnqueueMemBufferReadRect
+piMemBufferPartition
+piEnqueueMemBufferWriteRect
+piextUSMHostAlloc
+