GCC or Boost is wrong here? Pulling in x86 intrinsics headers on PPC (again)

[barracuda156]

@iains I bring back the topic of pulling in wrong includes on PPC. New example:

In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/immintrin.h:29,
                 from /opt/local/include/boost/multiprecision/cpp_int/intel_intrinsics.hpp:68,
                 from /opt/local/include/boost/multiprecision/cpp_int/add_unsigned.hpp:10,
                 from /opt/local/include/boost/multiprecision/cpp_int/add.hpp:12,
                 from /opt/local/include/boost/multiprecision/cpp_int.hpp:2286,
                 from /opt/local/var/macports/build/_opt_PPCRosettaPorts_science_ESL/ESL/work/ESL-0.0.150/esl/law/legal_entity.hpp:35,
                 from /opt/local/var/macports/build/_opt_PPCRosettaPorts_science_ESL/ESL/work/ESL-0.0.150/esl/law/legal_person.hpp:39,
                 from /opt/local/var/macports/build/_opt_PPCRosettaPorts_science_ESL/ESL/work/ESL-0.0.150/esl/economics/finance/bond.hpp:32,
                 from /opt/local/var/macports/build/_opt_PPCRosettaPorts_science_ESL/ESL/work/ESL-0.0.150/esl/economics/finance/bondholder.hpp:37,
                 from /opt/local/var/macports/build/_opt_PPCRosettaPorts_science_ESL/ESL/work/ESL-0.0.150/esl/economics/company.hpp:48,
                 from /opt/local/var/macports/build/_opt_PPCRosettaPorts_science_ESL/ESL/work/ESL-0.0.150/esl/python_module_esl.cpp:556:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/mmintrin.h:52:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
   52 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/immintrin.h:31:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/xmmintrin.h:54:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
   54 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/xmmintrin.h:79:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/mmintrin.h:52:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
   52 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/immintrin.h:33:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/emmintrin.h:56:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
   56 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/emmintrin.h:66:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/xmmintrin.h:54:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
   54 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/immintrin.h:35:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/pmmintrin.h:49:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this warning."
   49 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this warning."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/pmmintrin.h:56:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/emmintrin.h:56:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
   56 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this error."
      |  ^~~~~
In file included from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/tmmintrin.h:44,
                 from /opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/immintrin.h:37:
/opt/local/lib/gcc12/gcc/powerpc-apple-darwin10/12.2.0/include/pmmintrin.h:49:2: error: #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this warning."
   49 | #error "Please read comment above.  Use -DNO_WARN_X86_INTRINSICS to disable this warning."
      |  ^~~~~

So Intel intrinsics are pulled from Boost multiprecision/cpp_int/intel_intrinsics.hpp:

#ifndef BOOST_MP_INTEL_INTRINSICS_HPP
#define BOOST_MP_INTEL_INTRINSICS_HPP
//
// Select which actual implementation header to use:
//
#ifdef __has_include
#if __has_include(<immintrin.h>)
#define BOOST_MP_HAS_IMMINTRIN_H
#endif
#endif

Now, I do not know whether Boost is doing something wrong (and then I open a ticket with them) or GCC.

[barracuda156]

@iains It has been fixed with Boost: boostorg/multiprecision#525 (comment)

(Maybe still worth adding guard macros in GCC for those headers?)