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+#
+# Sed script to parse CPP macros and generate output usable by make
+#
+# It is expected that this script is fed the output of 'gpp -dM'
+# which preprocesses the common.h header files and outputs the final
+# list of CPP macros (and whitespace is sanitized)
+#
+
+# Only process values prefixed with #define CONFIG_
+/^#define CONFIG_[A-Za-z0-9_]\+/ {
+ # Strip the #define prefix
+ s/#define *//;
+ # Change to form CONFIG_*=VALUE
+ s/ \+/=/;
+ # Drop trailing spaces
+ s/ *$//;
+ # drop quotes around string values
+ s/="\(.*\)"$/=\1/;
+ # Concatenate string values
+ s/" *"//g;
+ # Wrap non-numeral values with quotes
+ s/=\(.*\?[^0-9].*\)$/=\"\1\"/;
+ # Change '1' and empty values to "y" (not perfect, but
+ # supports conditional compilation in the makefiles
+ s/=$/=y/;
+ s/=1$/=y/;
+ # print the line
+ p
+}