Re: [Buildroot] [PATCH 1/2] package/gcnano-binaries: create symlinks for libGLESv2 and libGLESv1_CM.so

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

Thomas, All,

On 2022-08-04 22:41 +0200, Thomas Petazzoni via buildroot spake thusly:
> At least libepoxy, a user of OpenGL ES, expects libraries to be
> available as libGLESv2.so.2 and libGLESv1_CM.so.1. While other OpenGL
> implementations comply with this, gcnano-binaries does not, and
> installs its libraries directly as .so, without any ABI version,
> causing runtime failures with libepoxy or SDL2, as it tries to
> dlopen() the OpenGL ES libraries with their ABI suffix.
> 
> See for example the libepoxy code:
> 
>   https://github.com/anholt/libepoxy/blob/master/src/dispatch_common.c#L191
> 
> Fix this issue by adding the relevant symlinks.
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

Applied to master, thanks.

(this is a bit of a convoluted install command, if any...)

Regards,
Yann E. MORIN.

> ---
>  package/gcnano-binaries/gcnano-binaries.mk | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/package/gcnano-binaries/gcnano-binaries.mk b/package/gcnano-binaries/gcnano-binaries.mk
> index dc309ec3c2..ce9b24cc3a 100644
> --- a/package/gcnano-binaries/gcnano-binaries.mk
> +++ b/package/gcnano-binaries/gcnano-binaries.mk
> @@ -44,10 +44,17 @@ GCNANO_BINARIES_MODULE_MAKE_OPTS = \
>  
>  GCNANO_BINARIES_USERLAND_SUBDIR = gcnano-userland-multi-$(GCNANO_BINARIES_USERLAND_VERSION)
>  
> +# This creates:
> +#   libGLESv2.so.2    -> libGLESv2.so
> +#   libGLESv1_CM.so.1 -> libGLESv1_CM.so
> +# symlinks, as most OpenGL implementations have them, and they are
> +# expected by some users such as libepoxy.
>  define GCNANO_BINARIES_INSTALL
>  	cd $(@D)/$(GCNANO_BINARIES_USERLAND_SUBDIR)/release/drivers/ ; \
>  	find . -type f -exec $(INSTALL) -D -m 0755 {} $(1)/usr/lib/{} \; ; \
>  	find . -type l -exec cp -a {} $(1)/usr/lib \;
> +	ln -sf libGLESv2.so $(1)/usr/lib/libGLESv2.so.2
> +	ln -sf libGLESv1_CM.so $(1)/usr/lib/libGLESv1_CM.so.1
>  	mkdir -p $(1)/usr/include
>  	cp -a $(@D)/$(GCNANO_BINARIES_USERLAND_SUBDIR)/release/include/* $(1)/usr/include/
>  	ln -sf gbm/gbm.h $(1)/usr/include/gbm.h
> -- 
> 2.37.1
> 
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