Re: alloca redeclaration warning on MinGW

[Hrvoje Niksic]

Paul Eggert <address@hidden> writes:

> This doesn't look right to me, because if _MSC_VER is defined, it
> includes <malloc.h> without the "# define alloca _alloca" line that
> other people seem to have needed.

I haven't needed that line in Wget.  Maybe it was needed in older
versions of Visual C?

> What's the story on alloca versus _alloca in <malloc.h>?

I've seen other external function prefixed with "_" as well, but I
don't know the story behind them.

> Also, what is the difference between _MSC_VER, __BORLANDC__, and
> __MINGW32__?  Are these different compilers?

They are different compilers.  What they have in common is that they
(these days) run in the Win32 environment, which means that all of
them have <malloc.h>, which appears to be a standard Win32 headers.

Since the declaration already checked for _MSC_VER, it makes at least
as much sense to check for __BORLANDC__ and others.

> (Please bear in mind that I don't use DOS-related platforms so
> you'll have to explain obvious things.)

I don't use them either, but my users do, so I had to learn more about
them than is pleasant.