z80 Development Kit
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An option "--c-code-in-asm" for sdcc compiles will embed C code as comments in output assembly listings. With the recent change to using sdcc's preprocessor for sdcc compiles, the C code is correctly placed in the output asm listing.
There is potential for use of this option to cause compile errros when strings containing non-ascii characters are listed in the C code comments. The error arises because one of z88dk's tools, copt (a regular expression engine), is unable to deal with non-ascii character sets. You will still get the asm listing but binary generation will fail. To get the output binary in these cases, simply compile without this option enabled.
zcc +zx -vn -SO3 -clib=sdcc_iy --max-allocs-per-node200000 test.c -o test --c-code-in-asm --list
Among the generated files will be .lst files containing the asm output of the compiler with c code mingled in as comments.