PoCL: Bump to v7.1 and reenable Float16 support

[simeonschaub]

No description provided.

[simeonschaub]

Looks like we need a newer GCC version for Float16 support:

[15:42:53] -- Performing Test HOST_COMPILER_SUPPORTS_FLOAT16
[15:42:53] -- Performing Test HOST_COMPILER_SUPPORTS_FLOAT16 - Failed
[15:42:53] -- Host side compiler support for _Float16: 0
[15:42:53] CMake Warning at CMakeLists.txt:930 (message):
[15:42:53]   Note: GCC only supports _Float16 since version 12

[maleadt]

Also see pocl/pocl#1943 (reply in thread); that may be a better fix rather than reverting the commit.

[simeonschaub]

Hmm, now RISC-V is failing, not sure how to fix that

[giordano]

Maybe https://buildkite.com/julialang/yggdrasil/builds/24118#0199e267-e710-4eb4-946b-349c5f93a12a/1102-1582

[11:29:18] -- LLVMSPIRV library not found: LLVM_SPIRV_INCLUDEDIR-NOTFOUND |
[11:29:18] CMake Warning at cmake/LLVM.cmake:710 (message):
[11:29:19]   udivmodti4 doesn't compile at all!
[11:29:19] Call Stack (most recent call first):
[11:29:19]   CMakeLists.txt:762 (include)

is relevant?

[simeonschaub]

I don't think so. This was the case in https://buildkite.com/julialang/yggdrasil/builds/23892#0199b4b9-a462-4afb-924b-d8f1011e0701/1099-1560 as well and that job passed

[maleadt]

LGTM!

Please relay back whether the Float16 patch works in the PoCL thread.