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+
+[name]
+config.guess \- guess the build system triplet
+
+[Environment variables]
+config.guess might need to compile and run C code, hence it needs a
+compiler for the `build' machine: use the environment variable
+`CC_FOR_BUILD' to specify the compiler for the build machine.  If
+`CC_FOR_BUILD' is not specified, `CC' will be used.  Be sure to
+specify `CC_FOR_BUILD' is `CC' is a cross-compiler to the `host'
+machine.
+
+  CC_FOR_BUILD    a native C compiler, defaults to `cc'
+  CC              a native C compiler, the previous variable is preferred
+
+[description]
+The GNU build system distinguishes three types of machines, the
+`build' machine on which the compilers are run, the `host' machine
+on which the package being built will run, and, exclusively when you
+build a compiler, assembler etc., the `target' machine, for which the
+compiler being built will produce code.
+
+This script will guess the type of the `build' machine.