cross-compiler for PIC

[Jesus Ferrandis]

I have to do a C compiler for PIC. 

I'm considering to make a cross-compiler with GCC
instead of using the traditional compilers
construction
tools (PCCTS,yacc,lex...)to save all the lexical, and
synthetical part. 

I would like to know if it is viable (I have read that
making a cross compiler for an 8 bits Micro it's
complicated). If you have any suggestion (viability,
another tools...), please reply me.

Thanks!!!

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