[Buildroot] [PATCH 5/8] arch: introduce BR2_BINFMT_SUPPORTS_SHARED

Yann E. MORIN yann.morin.1998 at free.fr
Thu Dec 11 20:12:43 UTC 2014


Thomas, All,

On 2014-12-03 22:41 +0100, Thomas Petazzoni spake thusly:
> In preparation for the refactoring of the static/shared library
> support, we add a BR2_BINFMT_SUPPORTS_SHARED hidden option that binary
> formats supporting shared libraries should select.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> ---
>  arch/Config.in | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/arch/Config.in b/arch/Config.in
> index c05e5d7..c7bef5d 100644
> --- a/arch/Config.in
> +++ b/arch/Config.in
> @@ -251,6 +251,10 @@ config BR2_GCC_TARGET_MODE
>  config BR2_ARCH_HAS_ATOMICS
>  	bool
>  
> +# Must be selected by binary formats that support shared libraries.
> +config BR2_BINFMT_SUPPORTS_SHARED
> +	bool
> +
>  # Set up target binary format
>  choice
>  	prompt "Target Binary Format"
> @@ -261,6 +265,7 @@ choice
>  config BR2_BINFMT_ELF
>  	bool "ELF"
>  	depends on !BR2_bfin && !BR2_m68k
> +	select BR2_BINFMT_SUPPORTS_SHARED
>  	help
>  	  ELF (Executable and Linkable Format) is a format for libraries and
>  	  executables used across different architectures and operating
> @@ -269,6 +274,7 @@ config BR2_BINFMT_ELF
>  config BR2_BINFMT_FDPIC
>  	bool "FDPIC"
>  	depends on BR2_bfin
> +	select BR2_BINFMT_SUPPORTS_SHARED
>  	help
>  	  ELF FDPIC binaries are based on ELF, but allow the individual load
>  	  segments of a binary to be located in memory independently of each
> @@ -307,6 +313,7 @@ config BR2_BINFMT_FLAT_SEP_DATA
>  config BR2_BINFMT_FLAT_SHARED
>  	bool "Shared binary"
>  	depends on BR2_bfin || BR2_m68k

While at it, I noticed that those depends are completely superfluous,
because FLAT can only be selected for bfin || m68k anyway, and the
choice itself already depends on FLAT, which itself depends on bfin ||
m68k.

So, this "depends on" (as well as the one in the previous option) could
be removed entirely, I guess.

But that's not related to your patch, so:

Acked-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>

Regards,
Yann E. MORIN.

> +	select BR2_BINFMT_SUPPORTS_SHARED
>  	help
>  	  Allow to load and link indiviual FLAT binaries at run time.
>  
> -- 
> 2.1.0
> 
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