Chilly Willy's Sega MD/CD/32X devkit
http://gendev.spritesmind.net/forum/viewtopic.php?p=37609#p37609
Featuring:
gcc 12.1.0
binutils 2.38
newlib 4.2.0
zasm 4.4
The biggest change is zasm - you'll need to update the z80 make commands for it like this
ASMZ80 = $(ROOTDIR)/bin/zasm
FLAGSZ80 = -bv2
and the first couple lines of the z80 source file like this
#target ram
#code SRAM, $0000, $2000