When configuring canadian cross toolchain and you're unlucky enough to be
using a build and host that are different, but that config.sub thinks mean the same thing,
you might end up without BUILD_CC being defined as 'cc' or 'gcc',
which might cause $CC to be used instead, which would be wrong...

Dan Kegel

--- glibc-2.3.2/configure.old	2004-05-26 19:46:43.000000000 -0700
+++ glibc-2.3.2/configure	2004-05-26 19:52:47.000000000 -0700
@@ -3323,7 +3323,7 @@
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
-if test $host != $build; then
+if test "$cross_compiling" = yes; then
   for ac_prog in gcc cc
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.