According to Jesper Lund:

GPC does NOT allow "uses" in the implementation section of a unit. [...]

Fixed:

8< ---- diff for parse.y ---------------------------------------------------- @@ -6123,6 +6136,7 @@ ;

unit_implementation: + import_part /* This may be empty */ any_declaration_part optional_init_and_final_part ; 8< --------------------------------------------------------------------------

... but the Automake mechanism does not handle this correctly. To work around, compile one of the units manually before automaking the program. I will try to fix this for the next beta.

In most (Borland-style) programs, moving "uses b" to the interface part (an obvious workaround; or *solution* if the current GPC behavior is a feature and not a bug) should not make a difference, but I imagine that there could be a few exceptions.

Yes - not only a few ones. You cite it:

The Turbo Pascal 7.0 manual says about this: "[...] It also enables you to construct mutually dependent units."

Greetings,

Peter

Dipl.-Phys. Peter Gerwinski, Essen, Germany, free physicist and programmer peter.gerwinski@uni-essen.de - http://home.pages.de/~peter.gerwinski/ [971005] maintainer GNU Pascal [971001] - http://home.pages.de/~gnu-pascal/ [971005]