The dpcpp compiler is based on the LLVM compiler family and uses the flags described on that page. The Intel compilers optimization flags deliberately mimic many of those used with the GNU family of compilers. The basic optimization flags are summarized below. Using these flags does not result in any incompatibility between CPU architectures. Note that it is not recommended to use the Intel compiler when the program will be run on AMD processors due to lackluster executable performance in that case.
These flags will produce executables that contain specific SIMD instructions which may effect compatibility with compute nodes on the SCC. There is an alternate form of this flag, -x , which uses the options given below with -ax.
However, code compiled with -x will not execute at all on AMD processors so it is not recommended. Every function that can be compiled with SIMD instructions will have separate copies created for each instruction set. The executable will auto-detect CPU instruction support at runtime which version to run.
The compile times can be very long as functions will be compiled multiple times over and the resulting binary will be large. Several instruction sets can included with this command when comma-separated. For example: icc -c -O3 -msse4. This will result in fast code that can run on any compute node on the SCC. The -fast flag can be problematic due to its inclusion of the -xHost flag when run on the login nodes as they are Broadwell architecture CPUs which support AVX2 instructions.
Codes compiled with -fast will only be able to execute on Broadwell architecture compute nodes on the SCC. But now I get extern inline with ICC. Source: ICC man page. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. How to detect Intel's compiler ICC with ifdef? Ask Question.
Asked 9 years, 1 month ago. Active 9 months ago. Viewed 3k times. Improve this question. Peter Cordes k 41 41 gold badges silver badges bronze badges. Out of curiosity, why do you need that macro at all? I am using it for sophisticated numeric's. You can expect some porting will be needed for existing applications using ICC. No diagnostics numbers are listed for remarks, warnings, or notes. Every diagnostic is emitted with the corresponding compiler option to disable it. With icx For example, -xskylake-avx ICC Classic has many proprietary Intel pragmas.
Thus, it is recommended to check for the unsupported pragmas as a first porting step. You can check for unsupported pragmas using the ICX supported option -Wunknown-pragmas : icx -Wunknown-pragmas. Macros are being added dynamically. For any given version of ICX use the below command to output the currently defined macros. These are built with a given path into your build directory, to be used later from an installed location. The --relocatable-pch option enables this feature.
This is a big improvement over ICC Classic, which had limitations with pre-compiled headers. It is a 2-step process:. The diag- option is not supported and same for the numeric diagnostic messages. The clang manual gives you the list of descriptive phrases that can be used to enable or disable the diagnostic.
For more information, refer to, Diagnostic flags in Clang. Equivalent diagnostic control options exist for both the Linux and Windows Compilers. This section uses the Linux options for demonstration.
Refer to the relevant Windows option from the table above to migrate the Windows diagnostic control. For example, consider this following test case, the file unknown-pragma. The diagnostic warning can be silenced by disabling that warning through the ICC Classic option —diag-disable to disable the unrecognized pragma diagnostic. However, ICX does not have numbered diagnostic message, instead, it prints a hint about which diagnostic option can be used to control the diagnostic.
You can use —Wall to enable all warning diagnostics that pertain to your program. The warning message suggests the option that you can use to enable or disable that diagnostic.
0コメント