Re: [Xen-devel] [PATCH 04/24] autoconf: trim the configure script; use autoheader

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2012-04-16 at 18:17 +0100, Ian Jackson wrote:
> Remove a lot of unnecessary tests.  Specifically, we no longer test
> for standard POSIX facilities which we expect to be provided
> everywhere and which we don't in any case have any alternative for.

A good rule of thumb might be that if it isn't provided by "apt-get
install build-essential" (or the common set of stuff from the equivalent
meta-packages across common distros) then configure should check for it
in the interest of providing a useful upfront error message?

> Switch to generating config.h.in with autoheader.

> @@ -132,7 +127,7 @@ AC_SUBST(libext2fs)
>  AC_CHECK_LIB([gcrypt], [gcry_md_hash_buffer], [libgcrypt="y"], 
> [libgcrypt="n"])
>  AC_SUBST(libgcrypt)
>  AX_CHECK_PTHREAD
> -AC_CHECK_LIB([rt], [clock_gettime])

-lrt is always available? -l<one-or-two-letters> libraries seem to be
the ones which tend to differ across platforms, despite being
standardised...

> +AX_CHECK_PTYFUNCS

You don't actually add this until the next patch.

Ian.



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