Re: [Bug-gnulib] patch for AC_GNU_SOURCE on Solaris

[Bruno Haible]

Paul Eggert wrote:
> We could spend some time hacking on coreutils to make it portable to
> pedantic Solaris, but I don't think it's worth the bother.  It's
> easier simply to define __EXTENSIONS__, which is the Solaris analog
> to _GNU_SOURCE.

OK. It seems that the SGI Irix compilers define __EXTENSIONS__, but
nothing in their header files tests it. So it looks safe to define
__EXTENSIONS__.

>    dnl Prerequisites of lib/timespec.h.
> +  AC_REQUIRE([AC_GNU_SOURCE])

This is confusing because lib/timespec.h doesn't need _GNU_SOURCE.
I'd prefer either the creation of a separate macro AC_SOLARIS_SOURCE,
or renaming AC_GNU_SOURCE into AC_USE_SYSTEM_EXTENSIONS.

Bruno