Adding constraints.md to my port

[Jean Christophe Beyler <jean.christophe.beyler@gmail.com>]

Dear all,

I'm continuing this port and have run into something strange, if I add
a constraints.md file with only this:
(define_constraint "I"
  "A signed 16-bit constant (for arithmetic instructions)."
  (and (match_code "const_int")
       (match_test "SMALL_OPERAND (ival)")))

(Like one of the constraints from the mips port).

And add a :
(include "constraints.md")

to my md file, I get these during the compilation:
In file included from ./tm_p.h:5,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:35:
./tm-preds.h:40:1: warning: "CONSTRAINT_LEN" redefined
In file included from ./tm.h:6,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:24:
/home/toto/gcc-4.3.2/gcc/defaults.h:797:1: warning: this is the
location of the previous definition
In file included from ./tm_p.h:5,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:35:
./tm-preds.h:42:1: warning: "REG_CLASS_FROM_CONSTRAINT" redefined
In file included from ./tm.h:6,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:24:
/home/toto/gcc-4.3.2/gcc/defaults.h:810:1: warning: this is the
location of the previous definition
In file included from ./tm_p.h:5,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:35:
./tm-preds.h:44:1: warning: "CONST_OK_FOR_CONSTRAINT_P" redefined
In file included from ./tm.h:6,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:24:
/home/toto/gcc-4.3.2/gcc/defaults.h:801:1: warning: this is the
location of the previous definition
In file included from ./tm_p.h:5,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:35:
./tm-preds.h:47:1: warning: "CONST_DOUBLE_OK_FOR_CONSTRAINT_P" redefined
In file included from ./tm.h:6,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:24:
/home/toto/gcc-4.3.2/gcc/defaults.h:805:1: warning: this is the
location of the previous definition
In file included from ./tm_p.h:5,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:35:
./tm-preds.h:49:1: warning: "EXTRA_MEMORY_CONSTRAINT" redefined
In file included from ./tm.h:6,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:24:
/home/toto/gcc-4.3.2/gcc/defaults.h:781:1: warning: this is the
location of the previous definition
In file included from ./tm_p.h:5,
                 from /home/toto/gcc-4.3.2/gcc/c-pragma.c:35:
./tm-preds.h:51:1: warning: "EXTRA_ADDRESS_CONSTRAINT" redefined


Any ideas why this happens when I add a constraint to my machine description?

As always, thank you very much for your time,
Jean Christophe Beyler