Re: [Buildroot] [PATCH] package/gdb: build and link libbfd and libopcodes as static libraries

["Yann E. MORIN" <yann.morin.1998@free.fr>]

Thomas, All,

On 2023-12-25 23:54 +0100, Thomas Petazzoni via buildroot spake thusly:
> Since GDB 13.x and upstream commit
> b686ecb5b10be9a33ab8f1bfdcff22eef920d1a5 ("gdb: link executables with
> libtool"), gdb will be linked against the shared variants of libbfd
> and libopcodes if they exist. However, this causes host gdb and target
> gdb to not work, because our gdb package does not install libbfd and
> libopcodes (to not clash with the ones potentially installed by
> binutils).
> 
> In order to get around this, this commit proposes to get back to the
> situation we had before GDB 13.x: libbfd and libopcodes are only
> compiled as static libraries, so that they are linked directly inside
> the gdb binary, avoiding the problem entirely.
> 
> This resolves:
> 
>  # gdb --version
>  gdb: error while loading shared libraries: libopcodes-2.39.50.so: cannot open shared object file: No such file or directory
> 
> for target gdb, and:
> 
>  $ ./host/bin/arm-linux-gdb --version
>  ./host/bin/arm-linux-gdb: error while loading shared libraries: libopcodes-2.39.50.so: cannot open shared object file: No such file or directory
> 
> for host gdb.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

Applied to master, thanks.

Regards,
Yann E. MORIN.

> ---
>  package/gdb/gdb.mk | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
> 
> diff --git a/package/gdb/gdb.mk b/package/gdb/gdb.mk
> index 070598b385..ea710f0c1f 100644
> --- a/package/gdb/gdb.mk
> +++ b/package/gdb/gdb.mk
> @@ -121,8 +121,10 @@ GDB_MAKE_ENV += \
>  GDB_CONF_ENV += gdb_cv_prfpregset_t_broken=no
>  GDB_MAKE_ENV += gdb_cv_prfpregset_t_broken=no
>  
> -# The shared only build is not supported by gdb, so enable static build for
> -# build-in libraries with --enable-static.
> +# We want the built-in libraries of gdb (libbfd, libopcodes) to be
> +# built and linked statically, as we do not install them on the
> +# target, to not clash with the ones potentially installed by
> +# binutils. This is why we pass --enable-static --disable-shared.
>  GDB_CONF_OPTS = \
>  	--without-uiout \
>  	--disable-gdbtk \
> @@ -132,6 +134,7 @@ GDB_CONF_OPTS = \
>  	--without-included-gettext \
>  	--disable-werror \
>  	--enable-static \
> +	--disable-shared \
>  	--without-mpfr \
>  	--disable-source-highlight
>  
> @@ -248,10 +251,14 @@ endif
>  # A few notes:
>  #  * --target, because we're doing a cross build rather than a real
>  #    host build.
> -#  * --enable-static because gdb really wants to use libbfd.a
> +#  * --enable-static --disable-shared because we want host gdb to
> +#    build and link against a static version of libbfd and
> +#    libopcodes, because we don't install the shared variants of
> +#    those libraries in $(HOST_DIR), as it might clash with binutils
>  HOST_GDB_CONF_OPTS = \
>  	--target=$(GNU_TARGET_NAME) \
>  	--enable-static \
> +	--disable-shared \
>  	--without-uiout \
>  	--disable-gdbtk \
>  	--without-x \
> -- 
> 2.43.0
> 
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