autoconf libelf and ARM cross-compilation -lelf linking

[Mark Wielaard]

Hi Turgis,

On Thu, 2011-09-01 at 16:22 +0200, Turgis, Frederic wrote:
> Well, AC_CHECK_HEADERS([libelf.h],[staprun_LIBS="$staprun_LIBS -lelf"],[]) works fine in fact, I just needed a bit more info to perform the right generation of configure.
> With that, cross-linking does not fail if cross environment does not have libelf.
> 
> However I was told internally to use AC_CHECK_LIB instead. So 2 points:
> - This requires a symbol to test at link so I tried to find something generic in libelf.h -> "elf_begin". Feel free to find more generic
> AC_CHECK_LIB(elf, elf_begin, [staprun_LIBS="$staprun_LIBS -lelf"], [])

That looks sane, but I would like to move assignment into the already
existing AC_CHECK_LIB that tests for the function we actually want to
use (elf_getshdrstrndx). Patch attached. Would that work for you?

Thanks,

Mark
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