zfs fails to build on x32 ABI

[devsk]

Just filing it here for record keeping.

x32 is a supported new ABI in 3.4.x kernels. The long and pointers are 32-bit. All 64-bit registers are available. Reduced memory footprint in user space and efficient CPU cache line usage makes it more performant.

As far as I understand it, the kernel module for ZFS must compile & link in 64-bit ABI and user space for ZFS can be in any ABI but finding compatible versions of dependent libs like zlib may force to use x32 ABI on a x32 system.

First failure in the zfs build inside a x32 chroot from gentoo stage3:

/bin/sh ../../libtool --tag=CC --silent --mode=compile gcc -DHAVE_CONFIG_H -include ../../zfs_config.h -I../../lib/libspl/include -Wall -Wstrict-prototypes -fno-strict-aliasing -Wno-unused-but-set-variable -DNDEBUG -D_GNU_SOURCE -D__EXTENSIONS__ -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -DTEXT_DOMAIN="zfs-linux-user" -Wframe-larger-than=1024 -O2 -march=native -fforce-addr -fomit-frame-pointer -pipe -ftracer -MT xdr.lo -MD -MP -MF .deps/xdr.Tpo -c -o xdr.lo test -f '../../lib/libspl/xdr.c' || echo './'../../lib/libspl/xdr.c
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/sys/time.h:31,
from ../../lib/libspl/gethrestime.c:28:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/mkdirp.c:39:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/sys/list_impl.h:30,
from ../../lib/libspl/include/sys/list.h:29,
from ../../lib/libspl/list.c:30:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
make[4]: *** [gethrestime.lo] Error 1
make[4]: *** Waiting for unfinished jobs....
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/strlcat.c:28:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/unistd.h:43,
from ../../lib/libspl/getexecname.c:29:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/statcommon.h:32,
from ../../lib/libspl/timestamp.c:29:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from /usr/include/rpc/xdr.h:38,
from ../../lib/libspl/include/rpc/xdr.h:35,
from ../../lib/libspl/xdr.c:32:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/zone.h:31,
from ../../lib/libspl/zone.c:26:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
make[4]: *** [getexecname.lo] Error 1
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/sys/mnttab.h:35,
from ../../lib/libspl/getmntany.c:34:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
In file included from ../../lib/libspl/include/sys/types.h:30:0,
from ../../lib/libspl/include/sys/time.h:31,
from ../../lib/libspl/gethrtime.c:28:
../../lib/libspl/include/sys/isa_defs.h:129:2: error: #error "Both _ILP32 and _LP64 are defined"
../../lib/libspl/timestamp.c: In function 'print_timestamp':
../../lib/libspl/timestamp.c:46:3: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'time_t' [-Wformat]
make[4]: *** [timestamp.lo] Error 1

[ryao]

Jory Pratt, another Gentoo developer, informed me that emerge sys-fs/zfs built successfully on x32 a few hours ago. Which kernel sources did you use and had you built your kernel before attempting to build this?

[devsk]

I am emerge'ing sys-fs/zfs-0.6.0_rc9-r5::gentoo from the tree and I see the above messages. SPL installed fine. Is he running a later version of the ebuild?

I am building against 3.4.4, which is fully built and has SPL modules in /lib/modules.

[FransUrbo]

@devsk @ryao @behlendorf Considering this is almost two years old, against an ancient version of both zfs and kernel, can we close this? Or is this still an issue, there's been substantial support added for x32 since it was first issued?

[behlendorf]

Clearly nobody feels to strongly about this. Yes, let's close it out until we have a more actionable bug.

[fling-]

build fails with "Both _ILP32 and _LP64 are defined" error in lib/libspl/include/sys/isa_defs.h
build.log

[behlendorf]

Reopening since this is clearly still an issue. Perhaps someone will find the time to investigate these build failures.

[nabijaczleweli]

hi