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Trying to follow this (Intel64/Linux):

https://www.intel.com/content/www/us/en/develop/documentation/oneapi-dpcpp-cpp-compiler-dev-guide-and-reference/top/compiler-reference/libraries/intel-c-class-libraries/intel-s-valarray-implementation.html

But it doesn't seem to recognize -use-intel-optimized-headers for compilation, only for linking?

icpx -use-intel-optimized-headers -c valarray.C

icpx: warning: argument unused during compilation: '-u se-intel-optimized-headers' [-Wunused-command-line-argument]

icpx -use-intel-optimized-headers valarray.o

(no error/warning)

icpx -use-intel-optimized-headers valarray.C

(no error/warning)

(FWIW, icpc doesn't seem to produce the same error message)

c1mth0g
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  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking. – Community Nov 19 '22 at 19:02
  • The intel website seems to imply that the -use-intel-optimized-headers flag should be use both for compiling and linking. But it’s complaining it doesn’t recognize this option when compiling (when using icpx; icpc seems ok) – c1mth0g Nov 20 '22 at 21:38
  • We could reproduce your issue. We are working on this internally and will update once resolved. Thanks! :) – AlekhyaV - Intel Dec 07 '22 at 09:17

1 Answers1

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Yes, you are correct. With the transition from icc/icpc to llvm-based icx/icpx, we improved compiler diagnostics which are now inline with clang.

Given the option "-use-intel-optimized-headers" is only used at link time and not compile time, icpx producing the warning of it being unused in a compile-only step is expected.

Thanks, Varsha

Varsha - Intel
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