Description:
Compiling ppdpo.cxx...
ppdmerge.cxx:36:31: error: 'ppd_file_t' was not declared in this scope
ppdmerge.cxx:36:43: error: 'ppd' was not declared in this scope
ppdmerge.cxx: In function 'int main(int, char**)':
ppdmerge.cxx:50:3: error: 'ppd_file_t' was not declared in this scope
ppdmerge.cxx:50:15: error: 'ppd' was not declared in this scope
ppdmerge.cxx:99:33: error: 'ppdOpen2' was not declared in this scope
ppdmerge.cxx:101:9: error: 'ppd_status_t' was not declared in this scope
ppdmerge.cxx:101:22: error: expected ';' before 'status'
ppdmerge.cxx:106:9: error: 'status' was not declared in this scope
ppdmerge.cxx:106:39: error: 'ppdLastError' was not declared in this scope
ppdmerge.cxx:109:40: error: 'ppdErrorString' was not declared in this scope
ppdmerge.cxx:131:42: error: 'ppd_locale' cannot be used as a function
ppdmerge.cxx:138:14: error: 'ppdClose' was not declared in this scope
ppdmerge.cxx:202:21: error: 'ppdClose' was not declared in this scope
ppdmerge.cxx:214:27: error: expected primary-expression before ')' token
ppdmerge.cxx:214:28: error: expected ';' before 'cupsArrayFirst'
ppdmerge.cxx:216:27: error: expected primary-expression before ')' token
ppdmerge.cxx:216:28: error: expected ')' before 'cupsArrayNext'
ppdmerge.cxx:216:47: error: expected ';' before ')' token
ppdmerge.cxx:353:1: error: expected '}' at end of input
ppdmerge.cxx:95:7: error: label 'error' used but not defined
ppdmerge.cxx: At global scope:
ppdmerge.cxx:37:14: warning: 'void usage()' declared 'static' but never defined [-Wunused-function]
make[1]: *** [ppdmerge.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [all] Error 1

Additional info:
* cupsddk 1.2.3-3

Steps to reproduce:
Try to build it.