[Buildroot] [PATCH v3 1/7] arch: toolchain: Introduce binary formats BINFMT_*.
Arnout Vandecappelle
arnout at mind.be
Wed Apr 10 06:11:57 UTC 2013
Hi Sonic,
On 09/04/13 08:29, Sonic Zhang wrote:
> From: Sonic Zhang <sonic.zhang at analog.com>
>
> v3-changes:
Please put your changelog below the Signed-off-by line, separated by ---
This way, the changelog doesn't appear in the final git commit log (it's
anyway not relevant anymore).
> - Rename the BINFMT dependency names in external toolchain config file.
> - Add some help text to BINFMT macros.
>
> v2-changes:
> none
>
> v1-changes:
> - Just introduce the symbol and options in arch generic Config.in.
> Append FLAT format link flags to external toolchain wrapper.
>
> Signed-off-by: Sonic Zhang <sonic.zhang at analog.com>
> ---
> arch/Config.in | 29 ++++++++++++++++++++
> toolchain/toolchain-external/Config.in | 12 ++++----
> toolchain/toolchain-external/ext-tool.mk | 4 +++
> .../toolchain-external/ext-toolchain-wrapper.c | 3 ++
> 4 files changed, 42 insertions(+), 6 deletions(-)
>
> diff --git a/arch/Config.in b/arch/Config.in
> index 472b10c..5dd6467 100644
> --- a/arch/Config.in
> +++ b/arch/Config.in
> @@ -174,6 +174,35 @@ config BR2_GCC_TARGET_ABI
> config BR2_GCC_TARGET_CPU
> string
>
> +# Set up target binary format
> +choice
> + prompt "Target Binary Format"
I don't really like to have this choice-which-isn't-really-a-choice for
all platforms. I think the following should work:
prompt "Target Binary Format" if BR2_bfin
> + default BR2_BINFMT_ELF
There should be a default for blackfin as well. So either put
default BR2_BINFMT_FDPIC if BR2_bfin
default BR2_BINFMT_ELF
or alternatively you can put a 'default y' at the appropriate places below.
> +config BR2_BINFMT_ELF
This symbol isn't used anywhere. Does it make sense to have it? We only
need a binfmt choice on platforms that offer the choice, right?
> + bool "ELF"
> + depends on !BR2_bfin
> + help
> + ELF (Executable and Linkable Format) is a format for libraries and
> + executables used across different architectures and operating
> + systems.
An empty line between the config options would be nice.
> +config BR2_BINFMT_FDPIC
> + bool "FDPIC"
> + depends on BR2_bfin
> + 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
> + other. This makes this format ideal for use in environments where no
> + MMU is available.
I like this help text! It's very clear.
Regards,
Arnout
> +config BR2_BINFMT_FLAT
> + bool "FLAT"
> + depends on BR2_bfin
> + select BR2_PREFER_STATIC_LIB
> + help
> + FLAT binary is a relatively simple and lightweight executable format
> + based on the original a.out format. It is widely used in environment
> + where no MMU is available.
> +endchoice
> +
> if BR2_arm || BR2_armeb
> source "arch/Config.in.arm"
> endif
[snip]
--
Arnout Vandecappelle arnout at mind be
Senior Embedded Software Architect +32-16-286500
Essensium/Mind http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
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