Libraries - Petewg/harbour-core GitHub Wiki
Harbour Libraries summary
(page just started!
TODO: add description about each library scope and functionality.)\
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List of Harbour core libraries:
hbcommon hbpp hbrtl hbmacro hblang hbcpage hbextern hbrdd rddntx rddnsx rddcdx rddfpt hbsix hbhsx hbusrrdd gtcgi gtpca gtstd gtwvt gtgui gtwin gtos2 gttrm gtcrs gtsln gtxwc hbvm hbvmmt hbmaindllh
Never include them manually (ed.: in build scripts).
They are managed automatically by HBMK2. Even if adding them reduces number of unresolved externals then it does not fix anything because in such case final binaries can be broken because they will contain two copies of the same code one from harbour*.dll and second from above libraries. It may cause any unpredictable results. Adding core libraries to hbmk2 is always wrong.\
(the above excerpt is from a comment by Przemek, in Harbour-users group)