[BRLTTY] cross-compilation of brltty & pkg-config

[Shérab]

Hello,

Samuel Thibault (2019/09/07 15:19 +0200):
> Hello,
> 
> Among the warnings raised by Debian tools, there is:
> 
> W: autotools-pkg-config-macro-not-cross-compilation-safe
> N:
> N:   The package appears to use AC_PATH_PROG to discover the location of
> N:   pkg-config(1). This macro fails to select the correct version to
> N:   support cross-compilation.
> N:
> N:   A better way would be to use the PKG_PROG_PKG_CONFIG macro from pkg.m4
> N:   and then using the $PKG_CONFIG shell variable.
> N:
> N:   Refer to https://bugs.debian.org/884798 for details.
> 
> Brltty doesn't currently seem to be using external .m4 files, so I'm not
> sure how it would be preferred to include pkg.m4 to get the proper
> PKG_PROG_PKG_CONFIG macro.

It could for instance be added to a build-aux directory and then it
would be enough to add the following line to aclocal.m4:

m4_include([build-aux/pkg.m4])

Shérab.