On 2009-03-03 17:59-0600 Thomas Stover wrote: > >>> >>> The current stumbling block for the cairo drivers is that they use >>> pkg-config to get the correct paths and libraries to link in. This won't >>> work on a cross-compiled environment unless you provide suitable >>> pkg-config >>> files from a cross-compiled version of cairo. This should be possible >>> though. >> >> Yes. This may already be covered in the CMake cross-build wiki, but >> instead >> of setting PKG_CONFIG_PATH (which always sets the native pkg-config default >> path in addition to the non-native one you set), you should set >> PKG_CONFIG_LIBDIR (which sets only the non-native path that you specify and >> which excludes the native pkg-config path). > > I have read that in places to, and have yet fully understand the distinction > between the two. We use PKG_CONFIG_PATH for cross builds all the time and get > results. For one thing, how would pkg-config 'know' what is native and > non-native?
pkg-config knows exactly what PATHS to check by what you specify to PKG_CONFIG_LIBDIR. If a non-native package does not exist, the PKG_CONFIG_LIBDIR method will do that right thing which is to report it does not exist while for this case the PKG_CONFIG_PATH method will fall back to the native path (check the man page for pkg-config) which obviously is the wrong thing to do for cross-builds. This is why the PKG_CONFIG_PATH method is deprecated for cross-build environments. > I wouldn't want a cross build to ever link to a native lib > anyway. Exactly, which is why you should always use PKG_CONFIG_LIBDIR for cross builds. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); PLplot scientific plotting software package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________ ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ Plplot-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/plplot-devel
