1#
2# Sed script to parse CPP macros and generate output usable by make
3#
4# It is expected that this script is fed the output of 'gpp -dM'
5# which preprocesses the common.h header files and outputs the final
6# list of CPP macros (and whitespace is sanitized)
7#
8
9# Only process values prefixed with #define CONFIG_
10/^#define CONFIG_[A-Za-z0-9_][A-Za-z0-9_]*/ {
11	# Strip the #define prefix
12	s/#define *//;
13	# Change to form CONFIG_*=VALUE
14	s/  */=/;
15	# Drop trailing spaces
16	s/ *$//;
17	# drop quotes around string values
18	s/="\(.*\)"$/=\1/;
19	# Concatenate string values
20	s/" *"//g;
21	# Assume strings as default - add quotes around values
22	s/=\(..*\)/="\1"/;
23	# but remove again from decimal numbers
24	s/="\([0-9][0-9]*\)"/=\1/;
25	# ... and from negative decimal numbers
26	s/="\(-[1-9][0-9]*\)"/=\1/;
27	# ... and from hex numbers
28	s/="\(0[Xx][0-9a-fA-F][0-9a-fA-F]*\)"/=\1/;
29	# ... and from configs defined from other configs
30	s/="\(CONFIG_[A-Za-z0-9_][A-Za-z0-9_]*\)"/=$(\1)/;
31	# Change '1' and empty values to "y" (not perfect, but
32	# supports conditional compilation in the makefiles
33	s/=$/=y/;
34	s/=1$/=y/;
35	# print the line
36	p
37}
38