#
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# Sed script to parse CPP macros and generate output usable by make
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#
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# It is expected that this script is fed the output of 'gpp -dM'
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# which preprocesses the common.h header files and outputs the final
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# list of CPP macros (and whitespace is sanitized)
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#
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# Only process values prefixed with #define CONFIG_
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/^#define CONFIG_[A-Za-z0-9_][A-Za-z0-9_]*/ {
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# Strip the #define prefix
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s/#define *//;
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# Change to form CONFIG_*=VALUE
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s/ */=/;
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# Drop trailing spaces
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s/ *$//;
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# drop quotes around string values
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s/="\(.*\)"$/=\1/;
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# Concatenate string values
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s/" *"//g;
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# Assume strings as default - add quotes around values
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s/=\(..*\)/="\1"/;
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# but remove again from decimal numbers
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s/="\([0-9][0-9]*\)"/=\1/;
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# ... and from negative decimal numbers
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s/="\(-[1-9][0-9]*\)"/=\1/;
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# ... and from hex numbers
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s/="\(0[Xx][0-9a-fA-F][0-9a-fA-F]*\)"/=\1/;
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# ... and from configs defined from other configs
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s/="\(CONFIG_[A-Za-z0-9_][A-Za-z0-9_]*\)"/=$(\1)/;
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# Change '1' and empty values to "y" (not perfect, but
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# supports conditional compilation in the makefiles
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s/=$/=y/;
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s/=1$/=y/;
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# print the line
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p
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}
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