https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69759
--- Comment #3 from Andreas Schwab ---
The manpage says, "On many systems alloca() cannot be used inside the list of
arguments of a function call", so your function bar is not portable.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69759
--- Comment #2 from Martin Sebor ---
So it is. Thanks for the correction. The trouble is that while saying this
little may be sufficient for builtins that correspond to functions fully
specified elsewhere (e.g., in the C standard) it's inadequa
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69759
--- Comment #1 from Andrew Pinski ---
It is documented, just not the way you think it is:
See https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html:
Outside strict ISO C mode (-ansi, -std=c90, -std=c99 or -std=c11), the
functions _exit, +++alloc
