|  26.4.6 Supporting Building with a Cross Compiler 
If you want to make it possible to build a program which you are
developing using a cross compiler, you must take some care when writing
your `configure.in' and makerules.  Simple cases will
normally work correctly.  However, it is not hard to write configure
tests which will fail when building with a cross compiler, so some care
is required to avoid this. 
You should write your `configure' scripts to support building with
a cross compiler if you can, because that will permit others to build
your program on a fast compilation server.
 
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