Problem compiling ffi part of build on AIX 5.3.

[dbyrne]

BPO	5718
Nosy	@loewis, @skrah

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2014-07-24.13:06:47.352>
created_at = <Date 2009-04-07.15:15:42.034>
labels = ['ctypes', 'build']
title = 'Problem compiling ffi part of build on AIX 5.3.'
updated_at = <Date 2014-07-24.13:06:47.350>
user = 'https://bugs.python.org/dbyrne'

bugs.python.org fields:

activity = <Date 2014-07-24.13:06:47.350>
actor = 'skrah'
assignee = 'none'
closed = True
closed_date = <Date 2014-07-24.13:06:47.352>
closer = 'skrah'
components = ['ctypes']
creation = <Date 2009-04-07.15:15:42.034>
creator = 'dbyrne'
dependencies = []
files = []
hgrepos = []
issue_num = 5718
keywords = []
message_count = 6.0
messages = ['85714', '85737', '220423', '223754', '223830', '223832']
nosy_count = 6.0
nosy_names = ['loewis', 'sable', 'dbyrne', 'skrah', 'BreamoreBoy', 'David.Edelsohn']
pr_nums = []
priority = 'low'
resolution = 'out of date'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue5718'
versions = ['Python 2.6']

[dbyrne]

I am using AIX 5.3 xlc 9.0. I am unable to get the libffi section to
build. It also happens with the separate libffi code, so I will try to
report there as well. I get the following:

cc_r -qlanglvl=extc89 -DNDEBUG -O -I.
-I/appl/bwc/src/Python-2.6.1/./Include
-Ibuild/temp.aix-5.3-2.6/libffi/include -Ibuild/temp.aix-5.3-2.6/libffi
-I/appl/bwc/src/Python-2.6.1/Modules/_ctypes/libffi/src
-I/appl/bwc/local2/include -I. -IInclude -I./Include
-I/usr/local/include -I/appl/bwc/src/Python-2.6.1/Include
-I/appl/bwc/src/Python-2.6.1 -c
/appl/bwc/src/Python-2.6.1/Modules/_ctypes/libffi/src/powerpc/aix_closure.S
-o
build/temp.aix-5.3-2.6/appl/bwc/src/Python-2.6.1/Modules/_ctypes/libffi/src/powerpc/aix_closure.o
Assembler:
/tmp/xlcS00-Mgqd.s: line 111: undefined symbol ".ffi_closure_helper_DARWIN"
/tmp/xlcS00-Mgqd.s: line 111: illegal expression type for branch address

[loewis]

Can you provide a patch? If not, chances are high that no action is taken.

[BreamoreBoy]

As we're now on 3.5, AIX is up to 7.1 and there's no patch can we close this one as out of date?

[BreamoreBoy]

@david what is your opinion on this issue?

[DavidEdelsohn]

ffi_closure_helper_DARWIN should have been declared "extern" in the assembly file. This has been fixed in more recent versions of libffi and imported into more recent versions of CPython, including 2.7.

.extern .ffi_closure_helper_DARWIN

Is it worth updating libffi.diff to insert the appropriate fix in 2.6 or not?

[skrah]

Thanks, David. If this is fixed in 2.7 we can close the issue.