Re: [Xen-devel] [PATCH 3 of 5] blktap2: fix vhd compilation under uclibc

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2011-12-19 at 13:30 +0000, Roger Pau Monnà wrote:
> 2011/12/19 Ian Campbell <Ian.Campbell@xxxxxxxxxx>:
> > On Mon, 2011-12-19 at 12:30 +0000, Roger Pau Monnà wrote:
> >> What's strange is that libvhd (which uses iconv) compiles and links
> >> fine,
> >
> > libvhd needs -liconv but it will compile and link without it fine. It is
> > only when you try to link something against that library that the
> > problem will manifest itself.
> >
> >>  but vhd-util that uses libvhd complains about undefined
> >> references to iconv, when vhd-util doesn't use iconv.
> >
> > Right.
> >
> > Ian.
> 
> I have a expression that checks for libiconv, but it will only detect
> it if ldconfig is present, if the system doesn't have ldconfig
> (NetBSD), libiconv will not be detected even if it is present:
> 
> which ldconfig 2>&1 >/dev/null && (ldconfig -p | grep -q libiconv &&
> echo 'y' || echo 'n') || echo 'n'

Urgh, surely there's a better way!

Perhaps grepping for LIBICONV_PLUG or libiconv_open or something unique
in iconv.h would be better?

BTW did you try defining LIBICONV_PLUG?

Ian.


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