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Add 0/1/2 warning levels to rgblink -Wtruncation (#1816)

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Rangi
2025-09-01 15:35:53 -04:00
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parent cc96b4d517
commit 534a4efee4
9 changed files with 90 additions and 28 deletions
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man/rgblink.1
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@@ -318,11 +318,20 @@ This warning is enabled by
Warn when a shift's operand is negative or greater than 32.
This warning is enabled by
.Fl Wall .
.It Fl Wno-truncation
.It Fl Wtruncation=
Warn when an implicit truncation (for example,
.Ic db
to an 8-bit value) loses some bits.
This occurs when an N-bit value is 2**N or greater, or less than -2**N.
.Fl Wtruncation=0
or
.Fl Wno-truncation
disables this warning.
.Fl Wtruncation=1
warns when an N-bit value is 2**N or greater, or less than -2**N.
.Fl Wtruncation=2
or just
.Fl Wtruncation
also warns when an N-bit value is less than -2**(N-1), which will not fit in two's complement encoding.
.El
.Sh EXAMPLES
All you need for a basic ROM is an object file, which can be made into a ROM image like so: