Re: [Xen-devel] [PATCH 3 of 4 v2] build: detect is libiconv is present

[Roger Pau Monnà <roger.pau@xxxxxxxxxxxxx>]

2011/12/21 Jean Guyader <jean.guyader@xxxxxxxxx>:
> That doesn't work if you do cross compilation, your libraries could
> located in a completely different path.
>
> The best way to check for the presence of a library (and this is how
> the autotools do it) is to generate a very simple C program that uses
> some iconv functions and try to compile it with the currently
> configured compiler. If the compilation succeeded that means the
> library is present.

I'm not sure this is easy to implement without much fuss, given the
way Xen checks for configuration options. What about this:

CONFIG_LIBICONV   := $(shell export OS="`uname -s`"; \
                       export CHECK_LIB="$(CHECK_LIB)"; \
                       . $(XEN_ROOT)/tools/check/funcs.sh; \
                       has_lib libiconv.so && echo 'y' || echo 'n')

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