Re: [Buildroot] [PATCH] Revert "package/gnupg2: bump to version 2.4.0"

[Thomas Petazzoni via buildroot <buildroot@buildroot.org>]

Hello Julien,

On Sat, 18 Feb 2023 12:13:16 +0100
Julien Olivain <ju.o@free.fr> wrote:

> I indeed started to receive some autobuild failures.
> Unfortunately, I cannot reproduce on my system for now:
> on my side, the build complete successfully.
> 
> I tried with _and_ without having a /usr/bin/gpgrt-config on host,
> which I was suspecting to bring some host config.
> 
> In my first proposal of gnupg2 version 2.4.0 bump [1], I initially 
> proposed
> to add Buildroot staging bin dir in PATH, to make sure we won't have 
> such
> host/br-staging confusion:
> 
> GNUPG2_CONF_ENV = PATH=$(STAGING_DIR)/usr/bin:$(BR_PATH)

This is a really bad idea, and can potentially break. Indeed,
STAGING_DIR/usr/bin contains lots of programs that are compiled for the
target. So if you do that, the build process on your build machine
might try to invoke executables that are compiled for the target.

If the issue comes from a <foo>-config script, then generally, two
things are needed:

 - Make sure the <foo>-config script returns correct values for
   cross-compilation. If not, use <pkg>_CONFIG_SCRIPTS in the package
   installing this <foo>-config script

 - Make sure the package calling the <foo>-config script calls the
   right one. Most autotools-based projects provide some sort of cache
   variable that allows to tell the configure script that <foo>-config
   in $(STAGING_DIR)/usr/bin/<foo>-config should be used

Best regards,

Thomas Petazzoni
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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