Re: A question about porting GCC to a javachip

[Jeffrey A Law <law at cygnus dot com>]

First note, you need to fix the date on your machine.  
  In message <002701bdb225$74e2da00$0d25848c@pwf-9>you write:
  > 1.In some porting reports , they indicate that it is easy to add a new =
  > machine description  to GCC --just add a few lines to =20
  >    "configure.in",but when I try to do it , I find that I have to create =
  > my javachip.h(tm.h) &javachip.c(tm.c)&javachip.md(.md
  >     file)first in order  to  avoid some unexpecting problems.Is it =
  > correct ?
When porting to a completely new architecture you will need to create new
files which describe the target machine.

  > 2. In order to achieve the porting task , do I have to rewrite any =
  > source code file in GCC , or all I have to do is to handle the=20
  >     four files above mentioned ?
Some ports require changing the target independent parts of the compiler,
some do not.  There is no simple answer to this question.


  > 3. Suppose that I have a sample test program test.c
[ ... ]
  >      Therefore, in order to achieve the task above mentioned . What =
  > files should
  >      I have to modify ?
The .c, .h & .md files you mentioned above.

  > And how should I do it ?
This is covered in the GCC manual.  I highly recommend you read the sections
which describe the RTL langauge, the target macros and the format of the
machine description file (the .md file).

jeff