Re: [PATCH] ARM: Use different linker path for hardfloat ABI

[Richard Earnshaw <rearnsha@arm.com>]

On 29/03/12 20:34, dann frazier wrote:
> This is an updated version of a patch Debian and Ubuntu are using to
> use an alternate linker path for hardfloat binaries. The difference
> with this one is that it covers the case where no float flag
> was passed in, defaulting to the softfloat path.
> 
> 2012-03-29  dann frazier <dann.frazier@canonical.com>
> 
> 	* config/arm/linux-elf.h: Use alternate linker path
>           for hardfloat ABI
> 
> Index: gcc/config/arm/linux-elf.h
> ===================================================================
> --- gcc/config/arm/linux-elf.h	(revision 185708)
> +++ gcc/config/arm/linux-elf.h	(working copy)
> @@ -59,14 +59,21 @@
>  
>  #define LIBGCC_SPEC "%{mfloat-abi=soft*:-lfloat} -lgcc"
>  
> -#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
> +#define LINUX_DYNAMIC_LINKER_SF "/lib/ld-linux.so.3"
> +#define LINUX_DYNAMIC_LINKER_HF "/lib/arm-linux-gnueabihf/ld-linux.so.3"
>  
>  #define LINUX_TARGET_LINK_SPEC  "%{h*} \
>     %{static:-Bstatic} \
>     %{shared:-shared} \
>     %{symbolic:-Bsymbolic} \
>     %{rdynamic:-export-dynamic} \
> -   -dynamic-linker " GNU_USER_DYNAMIC_LINKER " \
> +   %{msoft-float:-dynamic-linker " LINUX_DYNAMIC_LINKER_SF "} \
> +   %{mfloat-abi=soft*:-dynamic-linker " LINUX_DYNAMIC_LINKER_SF "} \
> +   %{mhard-float:-dynamic-linker " LINUX_DYNAMIC_LINKER_HF "} \
> +   %{mfloat-abi=hard:-dynamic-linker " LINUX_DYNAMIC_LINKER_HF "} \
> +   %{!mfloat-abi: \
> +     %{!msoft-float: \
> +       %{!mhard-float:-dynamic-linker " LINUX_DYNAMIC_LINKER_SF "}}} \
>     -X \
>     %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
>     SUBTARGET_EXTRA_LINK_SPEC
> 

Looks to me as though this will break the old Linux ABI.  While we've
marked that as deprecated, it hasn't been removed as yet.  So I think
this patch either needs to wait until that removal has taken place, or
provide the relevant updates to maintain the old ABI support.

R.