clean build question

[Spundun]

Hi , I downloaded 2.95.3 release tarball and I wanted to remove all
automatically generated files and make the system rebuild them (all the
yacc bison gperf stuff) but I wasnt able to do that. I tried gmake
distclean and gmake maintainer-clean in my build directory but it still
leaves c-parse.h and .c files in (probably among other files). can
anyone tell me the correct option to remove these files? (I know I am
not providing all the errors and stuff but I think I am just missing
something silly and the answer is probably very simple). 
Also, there seems to be a dependency betn c-parse.in and c-parse.y, can
I change c-parse.y without changing c-parse.in? or is c-parse.y supposed
to be automatically generated by c-parse.in? 
Thanx 
Spundun