Update CMake for oneapi-ifxgpu runs

[amametjanov]

Move -Xsycl-target-backend to link flags.

[BFB]

[github-actions]

PR Preview Action v1.4.8
🚀 Deployed preview to https://E3SM-Project.github.io/E3SM/pr-preview/pr-6715/
on branch gh-pages at 2024-11-09 01:26 UTC

[amametjanov]

Testing on Aurora:

• e3sm_integration + oneapi-ifx: 138 of 140 pass -- https://my.cdash.org/viewTest.php?buildid=2718723
• e3sm_scream_v1 + oneapi-ifx: 18 of 19 pass -- https://my.cdash.org/viewTest.php?buildid=2718751
• e3sm_gpucxx + oneapi-ifxgpu: 1 of 2 pass -- https://my.cdash.org/viewTest.php?buildid=2720577

Testing on Sunspot:

• e3sm_gpucxx + oneapi-ifxgpu: 1 of 2 pass -- https://my.cdash.org/viewTest.php?buildid=2720577

[oksanaguba]

for the gpu tests, the above says 1 out of 2 tests, but the cdash link shows only 1 test, where is the other, failing, one?

why did you test cpu builds? do i understand it right that the files you modified are not used in the cpu builds?

[oksanaguba]

i cannot seem to find SYCL_EXE_LINKER_FLAGS in a recent master, but other machine files are using CMAKE_EXE_LINKER_FLAGS . i also do not remember using ${ARCH}_EXE_LINKER_FLAGS before .

thanks!

[amametjanov]

The cdash link above is now updated to show both e3sm_gpucxx tests.
Yes, this PR has no effect on CPU builds: I ran them to check on the current state of e3sm and scream on Aurora.

This PR separates link flags -Xsycl-target-backend \"-device 12.60.7\" from compile flags in SYCL_FLAGS to clean-up warnings like

icpx: warning: argument unused during compilation: '-Xsycl-target-backend -device 12.60.7'

In E3SM builds, these flags are already in CMAKE_EXE_LINKER_FLAGS in this cmake line.
They are in a new SYCL_EXE_LINKER_FLAGS cmake-var for standalone Omega builds here.
Adding the link flags to existing CMAKE_EXE_LINKER_FLAGS cmake-var breaks builds for other libs like mct.

[oksanaguba]

if i understood it right, then SYCL_EXE_LINKER_FLAGS is a bad name, as it is used only by omega ('omega' should show up in the name). now i lost access to my builds, but it seems the issue will resurface in https://github.com/E3SM-Project/scream/pull/2593/files# where i used vars like SYCL_LINK_FLAGS . i am very confused about scope of various cmake variables in e3sm builds, and *cmake files for them (separation between e3sm shared libs and scream component). i might create a confl page with questions about this. to add -- also some build flags show up in link line (?).

[rljacob]

Notes: will rename variable and then merge.