Bugs item #1530448, was opened at 2006-07-28 10:04
Message generated for change (Comment added) made by montanaro
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Category: Build
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Skip Montanaro (montanaro)
Assigned to: Thomas Heller (theller)
Summary: ctypes build fails on Solaris 10
Initial Comment:
Thomas,
I tried to build Python from cvs (svn rev 50905) on
Solaris 10 today.
Compiler was gcc 3.4. I got a text relocation error
when linking
ctypes.so:
/opt/app/g++lib6/gcc-3.4/bin/gcc -shared
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/_ctypes.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/callbacks.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/callproc.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/stgdict.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/cfield.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/malloc_closure.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/prep_cif.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/ffi64.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/unix64.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/ffi.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/sysv.o
-L/usr/local/lib -o
build/lib.solaris-2.10-i86pc-2.5/_ctypes.so
Text relocation remains referenced
against symbol offset in file
ffi_closure_SYSV_inner 0x8e
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/sysv.o
ld: fatal: relocations remain against allocatable but
non-writable sections
collect2: ld returned 1 exit status
I tried configuring both with and without the
--with-system-ffi flag.
The error was the same in both cases.
If you need more information, let me know.
Skip
----------------------------------------------------------------------
>Comment By: Skip Montanaro (montanaro)
Date: 2006-08-01 11:16
Message:
Logged In: YES
user_id=44345
Thomas> Skip, do you have *any* idea what might be
Thomas> wrong, or could you even come up with a patch?
Skip> I've no idea so far. I'll try to find some time
Skip> to take a look at it later today.
Thomas,
Sorry for the delay. I think I have it figured out and it
was fairly straightforward. Looking at the files in order
on the _ctypes.so link line we see that the definition of
ffi_closure_SYSV_inner is defined before it's referenced:
for obj in
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/_ctypes.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/callbacks.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/callproc.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/stgdict.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/cfield.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/malloc_closure.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/prep_cif.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/ffi64.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/unix64.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/ffi.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/sysv.o
; do echo $obj; nm -p $obj | egrep ffi_closure_SYSV_inner; done
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/_ctypes.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/callbacks.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/callproc.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/stgdict.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/cfield.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/malloc_closure.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/prep_cif.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/ffi64.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/unix64.o
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/ffi.o
0000000456 T ffi_closure_SYSV_inner
build/temp.solaris-2.10-i86pc-2.5/home/ink/skipm/src/python-svn/trunk/Modules/_ctypes/libffi/src/x86/sysv.o
0000000000 U ffi_closure_SYSV_inner
Since we're linking from object files, it's a one-pass link
algorithm. At the time ffo.o is examined, sysv.o hasn't
been seen. Consequently, ffi_closure_SYSV_inner is not yet
known and its definition isn't picked up from ffi.o.
I couldn't quickly figure out where the link command is
generated, but I'm sure you'll know where it resides.
Either swap ffi.o and sysv.o on the link line, or add ffi.o
a second time to resolve the new reference.
Skip
----------------------------------------------------------------------
Comment By: Thomas Heller (theller)
Date: 2006-07-31 05:54
Message:
Logged In: YES
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Skip, do you have *any* idea what might be wrong, or could
you even come up with a patch?
----------------------------------------------------------------------
Comment By: Skip Montanaro (montanaro)
Date: 2006-07-28 17:03
Message:
Logged In: YES
user_id=44345
Yeah, you'd definitely need -fPIC on any brand of Solaris. That test might be
changed to
plat = get_platform()
if plat in (... buncha platforms ...) or "solaris" in plat:
os.environ["CFLAGS"] = "-fPIC"
That doesn't seem to be what's happening in this case though. I rm'd the .o
files in .../Modules/_ctypes and tried again. The compile commands *do*
have -fPIC on them. I don't think it's required on the link line.
S
----------------------------------------------------------------------
Comment By: Thomas Heller (theller)
Date: 2006-07-28 11:19
Message:
Logged In: YES
user_id=11105
Skip,
This looks *somewhat* like the problems reported in bugs
1529269 and 1528620 (although they have a sparc, and you
seem to have x86 solaris).
Hm, in the standalone ctypes setup script, I find this code
snippet:
if get_platform() in ["solaris-2.9-sun4u", "linux-x86_64"]:
os.environ["CFLAGS"] = "-fPIC"
Can it be that -fPIC must be used, but is not specified?
It is also funny that the solaris buildbot does NOT seem to
have a problem.
----------------------------------------------------------------------
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