[Buildroot] [PATCH 1/1] toolchain/toolchain-external: install ldd on the target

[Yann E. MORIN]

Sébastien, Julien, All,

On 2020-04-22 17:34 +0200, Sébastien Szymanski spake thusly:
> From: Julien Boibessot <julien.boibessot at armadeus.com>
> 
> From: Julien Boibessot <julien.boibessot at armadeus.com>
> 
> It could be usefull to have ldd on the target so install it.

What does ldd bring that can't be already achieved? For example on my
host system:

    $ ldd /bin/bash
        linux-vdso.so.1 (0x00007ffea5be0000)
        libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007f2ea6fa0000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f2ea6f9a000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2ea6da9000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f2ea7114000)

    $ LD_TRACE_LOADED_OBJECTS=1 /bin/bash
        linux-vdso.so.1 (0x00007ffd3d3a7000)
        libtinfo.so.6 => /lib/x86_64-linux-gnu/libtinfo.so.6 (0x00007f46883cd000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f46883c7000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f46881d6000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f4688419000)

(yes, that's shorter to type, I guess?)

Regards,
Yann E. MORIN.

> Signed-off-by: Julien Boibessot <julien.boibessot at armadeus.com>
> [Sébastien: add commit message]
> Signed-off-by: Sébastien Szymanski <sebastien.szymanski at armadeus.com>
> ---
>  toolchain/toolchain-external/pkg-toolchain-external.mk | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
> index 8667d7ddf6..6d91cb5d1e 100644
> --- a/toolchain/toolchain-external/pkg-toolchain-external.mk
> +++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
> @@ -499,6 +499,12 @@ define TOOLCHAIN_EXTERNAL_FIXUP_UCLIBCNG_LDSO
>  	fi
>  endef
>  
> +define TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LDD
> +	$(Q)if test -f $(STAGING_DIR)/usr/bin/ldd ; then \
> +		$(INSTALL) -D $(STAGING_DIR)/usr/bin/ldd $(TARGET_DIR)/usr/bin/ldd ; \
> +		$(SED) 's:.*/bin/bash:#!/bin/sh:' $(TARGET_DIR)/usr/bin/ldd ; \
> +	fi
> +endef
>  
>  ################################################################################
>  # inner-toolchain-external-package -- defines the generic installation rules
> @@ -593,6 +599,7 @@ define $(2)_INSTALL_TARGET_CMDS
>  	$$(TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LIBS)
>  	$$(TOOLCHAIN_EXTERNAL_INSTALL_TARGET_GDBSERVER)
>  	$$(TOOLCHAIN_EXTERNAL_FIXUP_UCLIBCNG_LDSO)
> +	$$(TOOLCHAIN_EXTERNAL_INSTALL_TARGET_LDD)
>  endef
>  
>  # Call the generic package infrastructure to generate the necessary
> -- 
> 2.25.3
> 
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