Compilation with Intel oneAPI: Many warnings

[MarDiehl]

When installing boost with Intel oneAPI using the recommended way (bootstrap), the compiler gives the following warning

These options as listed are not supported.
For more information, use '-qnextgen-diag'.
option list: 
	-ip
	-wd177,780,2196,1782,193,304,981,1418,411,734,279

This is defined here:

log/build/Jamfile.v2

Line 98 in 6366d73

<toolset>intel-linux:<cxxflags>"-wd177,780,2196,1782,193,304,981,1418,411,734,279"

For CMake, this is not an issue because the new, LLVM-based compiler identifies as IntelLLVM, not Intel (https://cmake.org/cmake/help/latest/variable/CMAKE_LANG_COMPILER_ID.html) and, hence, the options are not added here:

log/CMakeLists.txt

Line 416 in 6366d73

if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")

[Lastique]

As far as I can see, Boost.Build does not discriminate between the legacy Intel compiler and the newer LLVM-based one - both are identified as intel-linux (on Linux platform). So there is no way I could add these flags for the legacy compiler but not the newer one.

I can see you've already created an issue for b2 to support the new compiler. Until that issue is resolved, there's nothing I can do in Boost.Log.

In the meantime, you can patch your local Boost by removing the compiler options that don't work.

[MarDiehl]

yes, unfortunately the PR at b2 is stuck because there is no test setup for Intel compilers.

As far as I see, the flags specific to boost.log only disable warnings. So my suggestion would be to simply remove them to reverse the behavior: Instead of showing warnings for new compiler versions, show (other) warnings for old compiler versions. Unfortunately, one would still get the warning about -ip which is caused by b2.