After his tutorials on how to use SDCC with the Amstrad CPC, Norecess released a nice utility which makes it possible to use the Pasmo assembler instead of the in SDCC included ASZ80 assembler. This allows you to use a more familiar (Maxam style) assembly syntax. You can download it from Norecess’ homepage.
[UPDATE]
Version v1.1 was released and fixes bugs with IX/IY registers and adds _multiply and _abs at the end of the source.
[UPDATE]
Version v1.2 fixes another minor issues with IX/IY registers, adds better support for #< and #> and adds only needed C lib code to the end of the file.