If you have installed Intel® oneAPI Base Toolkit, you now have DPC++/C++ compiler.
Intel® C++ Compiler Classic has been deprecated and will be removed starting from version 2024.0.0. Users should use Intel® DPC++/C++ Compiler which is included in both Intel® oneAPI Base Toolkit and Intel® oneAPI HPC Toolkit.
Different C++ Compilers and Drivers
The following table provides the different compiler front-end information and drivers.
| Compiler | Notes | Linux* Driver | Windows* Driver |
|---|---|---|---|
| Intel® DPC++/C++ Compiler (BaseKit) | A C++ compiler with a Clang front-end to compile SYCL source codes and offload kernels to various devices | icpx -fsycl | icx.exe |
| A C++ compiler with a Clang front-end, supporting OpenMP* offload | icx | icx.exe |
Predefined Macros of Each Compiler
There are times that you may find the need to have specific code for the specific compiler above, it can be archieved by using the predefined macros provided by Intel Compilers. The differentiative predefined macros are included in the table below:
| Compiler | Predefined Macros to Differentiate from Other Compiler | Notes |
|---|---|---|
| Intel® DPC++ Compiler | SYCL_LANGUAGE_VERSION; __INTEL_LLVM_COMPILER; __VERSION |
SYCL_LANGUAGE_VERSION is defined in SYCL spec and should be defined by all SYCL compilers. __INTEL_LLVM_COMPILER can be used to differentiate Intel DPC++ compiler from others. |
| Intel® C++ Compiler | __INTEL_LLVM_COMPILER; __VERSION |
Predefined Macros for Intel® DPC++ Compiler
To define code block specific to Intel® DPC++ compiler, see the example below by using "#if defined(SYCL_LANGUAGE_VERSION) && defined (__INTEL_LLVM_COMPILER)":
// dpcpp only
#if defined(SYCL_LANGUAGE_VERSION) && defined (__INTEL_LLVM_COMPILER)
// code specific for DPC++ compiler below
// ... ...
// example only
std::cout << "SYCL_LANGUAGE_VERSION: " << SYCL_LANGUAGE_VERSION << std::endl;
std::cout << "__INTEL_LLVM_COMPILER: " << __INTEL_LLVM_COMPILER << std::endl;
std::cout << "__VERSION__: " << __VERSION__ << std::endl;
#endif
Output of oneAPI Toolkits 2023.2.0:
| Windows | Linux |
|---|---|
| SYCL_LANGUAGE_VERSION: 202001 __INTEL_LLVM_COMPILER: 20230200 __VERSION__: Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230627) |
SYCL_LANGUAGE_VERSION: 202001 __INTEL_LLVM_COMPILER: 20230200 __VERSION__: Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230622) |
Predefined Macros for Intel® C++ Compiler
To define code block specific to Intel® C++ Compiler, see the example below by using "#if !defined(SYCL_LANGUAGE_VERSION) && defined (__INTEL_LLVM_COMPILER)":
// icx only
#if !defined(SYCL_LANGUAGE_VERSION) && defined (__INTEL_LLVM_COMPILER)
// code specific for Intel C++ Compiler below
// ... ...
// example only
std::cout << "__INTEL_LLVM_COMPILER: " << __INTEL_LLVM_COMPILER << std::endl;
std::cout << "__VERSION__: " << __VERSION__ << std::endl;
#endif
Output of oneAPI Toolkits 2023.2.0:
| Windows | Linux |
|---|---|
|
__INTEL_LLVM_COMPILER: 20230200 __VERSION__: Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230627) |
__INTEL_LLVM_COMPILER: 20230200 __VERSION__: Intel(R) oneAPI DPC++/C++ Compiler 2023.2.0 (2023.2.0.20230622) |