IntelLLVM is not supported

[mablanchard]

Intel C/C++ compilers switched to LLVM and new ICX compiler is reported with CMAKE_CXX_COMPILER_ID set to IntelLLVM by CMake (testing CMake 3.23.1). This new string seems not to be handled correctly by BoostDetectToolset.cmake and throws messages like:

-- Boost toolset is unknown (compiler IntelLLVM 2022.1.0)

[pdimov]

@grafikrobot @grisumbras What is the correct b2 toolset name for the new LLVM-based Intel compiler?

[grafikrobot]

@pdimov it's just intel as before. Not sure which of the four platform variants of it support the new compiler though.

[mablanchard]

For reference, the hack below seems to be working here:

--- lib/cmake/BoostDetectToolset-1.77.0.cmake   (revision 2786)
+++ lib/cmake/BoostDetectToolset-1.77.0.cmake   (working copy)
@@ -32,7 +32,7 @@
     set(_BOOST_COMPILER_VERSION_MINOR)
   endif()

-elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
+elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel" OR CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")

   if(WIN32)

[pdimov]

Applied your suggestion on develop, https://github.com/boostorg/boost_install/commit/56f7c5da02a62c009954bfa0c9ccb1b57a3096a4. Sorry that didn't happen earlier; the notification must have come in an inopportune time so I've missed it.

It's a bit too late now for 1.81, the beta is already on its way, but I'll see if this can be applied post-beta.

[mablanchard]

My bad, I should have created a PR but felt like this was more of a hack rather than a proper fix. I never took the time to actually look at the CMake logic here...

[pdimov]

Should be the proper fix.

[pdimov]

Merged to master, should be in the final 1.81 release.

[mablanchard]

Thanks!