Re: [libvirt] [jenkins-ci PATCH v5 5/5] lcitool: support generating cross compiler dockerfiles

On Thu, Feb 28, 2019 at 06:46:41PM +0100, Andrea Bolognani wrote: > Okay, so I guess you need to have cross_target=i686-linux-gnu for > > ENV CONFIGURE_OPTS "--host={cross_target} \ > --target={cross_target}" > > to work; however, that will cause issues for > > ENV PKG_CONFIG_LIBDIR "/usr/lib/{cross_target}/pkgconfig" > > because as shown above paths look like > > /usr/lib/i386-linux-gnu/pkgconfig/glib-2.0.pc > > and so on. What an inconsistent mess! Does it mean we need to > carry around both? :( > > > ... Actually, it doesn't look like it: I just tried cross-building > for i686 (on sid/x86_64) by simply passing > > --host=i686-linux-gnu --target=i686-linux-gnu > > and the build system was able to locate all necessary dependencies > despite not having set $PKG_CONFIG_LIBDIR in the environment! > > This seems to be thanks to i686-linux-gnu-pkg-config, which is a > symlink to /usr/share/pkg-config-crosswrapper, being picked up and > invoked instead of the native one. Interesting. I'll have to check this again. In my previous versions of this series, pkgconfig was mistakenly finding the native .pc files, and PKG_CONFIG_LIBDIR was needed to fix it. So that can't have been using the i686-linux-gnu-pkg-config binary before. I'll try and see what changed..