$ grep '"providerdir"' `find . -name '*.h' `
./libs/aqbanking/banking_p.h:#define AB_BANKING_REGKEY_PROVIDERDIR "providerdir"

$ grep AB_BANKING_REGKEY_PROVIDERDIR `find . -name '*.c' `
./libs/aqbanking/banking.c:                                       AB_BANKING_REGKEY_PROVIDERDIR);


$ grep '"pkgdatadir"' `find . -name '*.h' `
./libs/aqbanking/banking_p.h:#define AB_BANKING_REGKEY_DATADIR     "pkgdatadir"

$ grep AB_BANKING_REGKEY_DATADIR `find . -name '*.c' `
./libs/aqbanking/banking.c:                                     AB_BANKING_REGKEY_DATADIR);