[Chicken-janitors] #1605: Display compiler warnings for macros with missing imports

[Chicken Trac]

#1605: Display compiler warnings for macros with missing imports
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 Reporter:  wasamasa     |                 Owner:
     Type:  enhancement  |                Status:  new
 Priority:  minor        |             Milestone:  someday
Component:  compiler     |               Version:  5.0.0
 Keywords:               |  Estimated difficulty:  hard
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 The compiler already displays warnings for procedures with missing imports
 which is super useful, especially when compiling code that's not wrapped
 in a module (wrapping it in a module will turn the warnings into errors).
 However there is no equivalent for macros with missing imports and neither
 does wrapping them into a module produce a warning or error.  This leads
 to less than obvious errors if you later import such a macro into other
 code and compile it, you'll then get an error for the import you forgot to
 add for the macro's module.  See #1603 for an example.

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Ticket URL: <https://bugs.call-cc.org/ticket/1605>
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CHICKEN Scheme is a compiler for the Scheme programming language.