Re: gnulib portability issues

[Paul Eggert]

On 06/10/2012 06:10 AM, Rich Felker wrote:
> As such, the first fix I would recommend is simply removing the check
> for freadahead(stdin)>0 from closein.c

But that will hurt performance on GNU/Linux and most other
POSIXish hosts, as it will cause them to issue lseek
system calls and whatnot that they don't need.

Instead, wouldn't it be better to change gnulib/lib/stdio-impl.h
so that it groks the musl FILE object?  Naturally, this would
inspect musl's "internals", but that'd be no different from
all those other libraries that stdio-impl.h supports.