> 2020-08-07 Bruno Haible
>
> Use __builtin_alloca with clang.
> * lib/alloca.in.h (alloca): Define as __builtin_alloca on clang.
This goes with it:
2020-08-07 Bruno Haible
alloca: No need to compile alloca.c with clang.
* lib/alloca.c: Skip all code with clan
clang supports __builtin_alloca.
On Windows, it does not have an header file, and therefore the use
of alloca(...) without any header file produces a warning
warning: implicitly declaring library function 'alloca' with type 'void
*(unsigned long long)'
Therefore, the bestes choices for gnulib
