[2.5.15] NTFS does not compile. (with gcc3.1)

[Axel H. Siebenwirth]

Dear kernel developers,

I know, I know, I am not supposed to use gcc 3.x with linux kernel build,
but maybe someone can just give me a hint what gcc option to add to NTFS
build to get it to work?
I just tried to build 2.5.15 and it stops during compilation of
fs/ntfs/aops.c because of included header file layout.h:

gcc -D__KERNEL__ -I/usr/src/linux-2.5.15/include -Wall -Wstrict-prototypes
-Wno-trigraphs -O2 -fomit-frame-pointer -fno-strict-aliasing -fno-common
-pipe -mpreferred-stack-boundary=2 -march=i686  -DNTFS_VERSION=\"2.0.6\"
-DDEBUG -DKBUILD_BASENAME=aops  -c -o aops.o aops.c
In file included from attrib.h:31,
                 from debug.h:31,
                 from ntfs.h:43,
                 from aops.c:30:
layout.h:299: unnamed fields of type other than struct or union are not
allowed
layout.h:1450: unnamed fields of type other than struct or union are not
allowed
layout.h:1466: unnamed fields of type other than struct or union are not
allowed
layout.h:1715: unnamed fields of type other than struct or union are not
allowed
layout.h:1892: unnamed fields of type other than struct or union are not
allowed
layout.h:2052: unnamed fields of type other than struct or union are not
allowed
layout.h:2064: unnamed fields of type other than struct or union are not
allowed
make[3]: *** [aops.o] Error 1
make[3]: Leaving directory /usr/src/linux-2.5.15/fs/ntfs'
make[2]: *** [first_rule] Error 2
make[2]: Leaving directory /usr/src/linux-2.5.15/fs/ntfs'
make[1]: *** [_subdir_ntfs] Error 2
make[1]: Leaving directory /usr/src/linux-2.5.15/fs'
make: *** [_dir_fs] Error 2

Regards,
Axel