[Buildroot] [PATCH v2] Add support for eglibc-2.17 multiarch layout, from Linaro 2013.07+

[Frank Hunleth]

Hi Greg,

On Tue, Sep 17, 2013 at 5:44 AM, Greg Beresford
<greg.beresford at zbdsolutions.com> wrote:
> From: Henry Luis <henry at echelon.com>
>
> Arch-specific libraries, including libc.so.6, are expected to be in a
> subdirectory of /lib (e.g. /lib/arm-linux-gnueabihf). This patch
> changes copy_toolchain_lib_root() in helper.mk to preserve the
> toolchain sysroot's lib directory structure, except for SUPPORT_LIB_DIR
> which are still copied directly under DESTDIR.
>
> Signed-off-by: Greg Beresford <greg.beresford at zbdsolutions.com>
> ---

Thanks for posting the patch. I've been trying it out, but I think
that I'm running into a bigger problem of how the shared library
search path works now. I.e. /usr/lib is not searched by default
anymore even though that's where many buildroot packages install their
libraries.

Here's the new search path:

/lib/arm-linux-gnueabihf/
/usr/lib/arm-linux-gnueabihf/tls/v7l/neon/vfp/
/usr/lib/arm-linux-gnueabihf/tls/v7l/neon/
/usr/lib/arm-linux-gnueabihf/tls/v7l/vfp/
/usr/lib/arm-linux-gnueabihf/tls/v7l/
/usr/lib/arm-linux-gnueabihf/tls/neon/vfp/
/usr/lib/arm-linux-gnueabihf/tls/neon/
/usr/lib/arm-linux-gnueabihf/tls/vfp/
/usr/lib/arm-linux-gnueabihf/tls/
/usr/lib/arm-linux-gnueabihf/v7l/neon/vfp/
/usr/lib/arm-linux-gnueabihf/v7l/neon/
/usr/lib/arm-linux-gnueabihf/v7l/vfp/
/usr/lib/arm-linux-gnueabihf/v7l/
/usr/lib/arm-linux-gnueabihf/neon/vfp/

I can think of a few hacks to get around this, but is there a right
way that I should be configuring buildroot to deal with this
multiarch/multilib toolchain feature?

Thanks,
Frank



>
> I couldn't initially see a particularly clear way of removing the pushd
> and popd commands, but the below worked (once I figured out how escape
> it properly.)
>
> Regards
> Greg
>
>  toolchain/helpers.mk | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
>
> diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
> index 0e270ee..3b4900d 100644
> --- a/toolchain/helpers.mk
> +++ b/toolchain/helpers.mk
> @@ -66,12 +66,17 @@ copy_toolchain_lib_root = \
>                 LIBDIR=`dirname $${LIBPATH}` ; \
>                 while test \! -z "$${LIBNAME}" ; do \
>                         LIBPATH=$${LIBDIR}/$${LIBNAME} ; \
> -                       rm -fr $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
> -                       mkdir -p $(TARGET_DIR)/$${DESTDIR}; \
> +                       if [ "$${dir}" = "$${SUPPORT_LIB_DIR}" ]; then \
> +                               DDIR=$${DESTDIR} ; \
> +                       else \
> +                               DDIR=$${LIBDIR\#$${ARCH_SYSROOT_DIR}} ; \
> +                       fi; \
> +                       rm -fr $(TARGET_DIR)/$${DDIR}/$${LIBNAME}; \
> +                       mkdir -p $(TARGET_DIR)/$${DDIR}; \
>                         if test -h $${LIBPATH} ; then \
> -                               cp -d $${LIBPATH} $(TARGET_DIR)/$${DESTDIR}/; \
> +                               cp -d $${LIBPATH} $(TARGET_DIR)/$${DDIR}/; \
>                         elif test -f $${LIBPATH}; then \
> -                               $(INSTALL) -D -m0755 $${LIBPATH} $(TARGET_DIR)/$${DESTDIR}/$${LIBNAME}; \
> +                               $(INSTALL) -D -m0755 $${LIBPATH} $(TARGET_DIR)/$${DDIR}/$${LIBNAME}; \
>                         else \
>                                 exit -1; \
>                         fi; \
> --
> 1.8.4
>
>
>
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-- 
Frank Hunleth
Troodon Software LLC
http://troodon-software.com/