SML-NJ for CygWin32

[Sigbjorn Finne]

> > > 
> > > This is clearly incorrect behavior on the part of CygWin's gcc.
> > Dollar
> > > signs are not valid leading characters of C (or C++) identifiers.
> > > 
> Until this is fixed in the preprocessor, the work-around for building
> SML-NJ is to add a space separator between the "$" and the constant.  I
> will NOT submit this change to the SML-NJ team.  They would likely
> reject it anyhow (I would).


Hi, 

AFAIK, it is ANSI that forbids $ in ids. I'd expect this restriction
to be enabled via -ansi (as per gcc docs.) For whatever reason, the
gcc2 snap included in b18 doesn't pass -$ to cpp with -ansi..

 foo$ gcc -v
 Reading specs from
 c:\usr\H-i386-cygwin32\lib\gcc-lib\i386-cygwin32\cygnus-2.7.2-970404\specs
 gcc version cygnus-2.7.2-970404
 foo$ echo 'subl $FOO, %eax' | gcc -E -Wp,-P -DFOO=4 -
 subl $FOO, %eax
 foo$ echo 'subl $FOO, %eax' | gcc -E -Wp,-P -DFOO=4 -ansi -
 subl $FOO, %eax

Suggested workaround: use -Wp,-$

 foo$ echo 'subl $FOO, %eax' | gcc -E -Wp,-P -DFOO=4 -Wp,-$ -
 subl $4 , %eax

HTH,
--Sigbjorn
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