This fixes compilation with libc++ 23, which has removed a number
of unnecessary transitive includes in its headers.
Include <cstdlib> in StringConv.h for std::strtoll and std::strtoull.
Include <cstdlib> for the declarations of malloc/free/realloc/calloc
in Alloc.cpp. (Without this, the functions we define end up with
C++ name mangling.)
Include <stdarg.h> in IO.cpp for va_start/va_end.
Instead of keeping the vlaue as a string array in the MetaLayer, convert
the value to its final type once.
Improves performance in some hotpaths that were doing config based
string conversion in a relatively high frequency.
It is not an external component, and it makes paths needlessly long.
Ryan seemed amenable to this when we discussed on IRC earlier.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Martin Storsjö