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Re: Use dl_iterate_phdr in Solaris 11+ unwinder
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>
- Cc: gcc-patches at gcc dot gnu dot org, Jakub Jelinek <jakub at redhat dot com>, Richard Henderson <rth at redhat dot com>
- Date: Mon, 29 Nov 2010 16:48:11 +0000 (UTC)
- Subject: Re: Use dl_iterate_phdr in Solaris 11+ unwinder
- References: <yddpqtopekh.fsf@manam.CeBiTec.Uni-Bielefeld.DE>
On Mon, 29 Nov 2010, Rainer Orth wrote:
> diff -r 523125a49e71 gcc/configure.ac
> --- a/gcc/configure.ac Sat Nov 27 11:35:42 2010 +0100
> +++ b/gcc/configure.ac Mon Nov 29 11:05:51 2010 +0100
> @@ -977,6 +977,9 @@
> gettimeofday mbstowcs wcswidth mmap mincore setlocale \
> gcc_UNLOCKED_FUNCS)
>
> +# Check for dl_iterate_phdr.
> +AC_CHECK_FUNCS(dl_iterate_phdr, [have_dl_iterate_phdr=yes])
This is wrong; it's checking for dl_iterate_phdr on the host rather than
the target. You can't do target link tests at this point, but you can
examine target headers to determine whether they declare something. See
the logic used by some configure tests to determine glibc_header_dir -
since that is actually generic logic for locating target headers and has
nothing to do with glibc, it should probably be refactored into a single
place.
--
Joseph S. Myers
joseph@codesourcery.com