On my system (openSUSE 12.2 / GNU bash, version 4.2.24(1)-release (x86_64-suse-linux-gnu) ), the shell doesn't like that the '=' character in 'if test...' doesn't have spaces around it. This causes the test to always be true, and thus the AS_AC_EXPAND macro only expands once. This led to two #define's in config.h containing broken values: HEXCHATSHAREDIR and DBUS_SERVICES_DIR.
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@@ -26,7 +26,7 @@ AC_DEFUN([AS_AC_EXPAND],
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dnl loop until it doesn't change anymore
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while true; do
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new_full_var="`eval echo $full_var`"
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if test "x$new_full_var"="x$full_var"; then break; fi
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if test "x$new_full_var" = "x$full_var"; then break; fi
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full_var=$new_full_var
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done
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