[Clfs-support] How do I keep configure scripts from looking at my BUILD system when cross compiling?

[George Boudreau]

Jon Dufresne wrote:
> Hi,
> 
> I am trying to configure programs for a cross compile. I've been
> following the cross-lfs as a guide to get me on my way but I diverge
> from it when I want a more custom setup. One aspect of my project that
> I would like to keep is to have all development files on the build
> system only. In the end I want the target system to only have binaries
> that were compiled by the build system's cross compiler using gcc's
> sysroot.
> 
   Correct.

> One issue I am having is that during the autotools configure stage of
> most packages, the configure script will make judgments based on my
> build system's environment rather than my target system's environment.
> For example, I am trying to compile directfb-1.0.0 which uses gnu
> autotools and I see the following during configure.
> 
> ./configure --build=${HOST} --host=${TARGET} 	--prefix=/usr
> ...
> ...
> checking for sdl-config... /usr/bin/sdl-config
> 
> 
> Now, I know I haven't installed SDL on my target system and I know I
> have SDL on my build system, and I can see the sdl-config file that
> configure picks up. So now the configure script is making decisions
> based on my build system rather than my target system.
> 
  This is my build order for directfb using framebuffer.

pkg-config-0.23
  Then use export PKG_CONFIG_SYSROOT_DIR=<where you put it> with these
zlib


libpng
libjpg
freetype
directfb
directfb_examples

This _may_ cure the problem but remember you can --disable- sdl/vnc/x11


> Any idea how to resolve this?
> 
> Thanks,
> Jon
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