3.2.6 Z80 Options

• [--callee-saves-bc] Force a called function to always save BC.
• [--no-std-crt0] When linking, skip the standard crt0.o object file. You must provide your own crt0.o for your system when linking.
• [--portmode=<Value>] Determinate PORT I/O mode (<Value> is z80 or z180).
• [--asm=<Value>] Define assembler name (<Value> is rgbds, asxxxx, isas or z80asm).
• [--codeseg <Value>] Use <Value> for the code segment name.
• [--constseg <Value>] Use <Value> for the const segment name.
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