A few Qs on the -Wfoo options

[ballsystemlord]

Ok, I've reread the docs. I had not noticed some of the entry before because
I did not read the sections on FORTRAN and C++. I also greped to info manual
but most of the options only had documentation for there '--no-'
counterparts.



-Wline-truncation           How can it be truncated?
-Wimplicit-interface        What's an explicit interface?
-Wimplicit-procedure        What's an explicit interface?
-Winvalid-memory-model      I could not find it mentioned in the info
manual.
-Wcharacter-truncation      "Warn when a character assignment will truncate
the assigned string." How/why would a string be truncated?
-Wlogical-op                Why would it give false positives? What's the
criteria under which it makes these assumptions?
-Wstack-protector           How can a function get smashed? 



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