according to https://bugzilla.redhat.com/show_bug.cgi?id=1806545
GCC's PCH mechanism is fundamentally incompatible with the security
hardening requirements for RHEL (PIE in particular). We are currently
evaluating the best way to present a more friendly diagnostic for this
issue.
and also
we don't turn on hardening the compiler and its binaries in DTS 9.
* more build dependencies
* fix for cmake < 3.11
It cannot do ADD_LIBRARY(... ALIAS ...) on IMPORTED targets
* another fix for cmake 3.10.2
It doesn't know about CMAKE_CXX_STANDARD=20,
let's add the correct flag manually
* gcc 8 on aarch64
utils/common/simd_arm.h:241:16: error: need ‘typename’ before ‘simd::TypeToVecWrapperType<T>::WrapperType’ because ‘simd::TypeToVecWrapperType<T>’ is a dependent scope
* build boost during build phase, not during configure
* add dependency for generated header files errorids.h messageids.h
see 7e868bc58833
* set explicit dependencies on external_boost for #include's
* clang-14 compatibility fix
