The Intel compiler tries to look like GCC *and* clang *and* it lies in
its __has_builtin() function (returns true when it should return false),
so override it.
Reported-by: Matthew Thompson
Fixes#9081Closes#9144
To work with more compilers without requiring separate libs to
link. Like with gcc-12 for RISC-V on Linux.
Reported-by: Adam Sampson
Fixes#9055Closes#9061
clang 14 warns about its use. It is being deprecated by the working
group for the programming language C: "The macro ATOMIC_VAR_INIT is
basically useless for the purpose for which it was designed"
Ref: https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2886.htm
Reported-by: Tatsuhiro Tsujikawa
Fixes#9041Closes#9042
