New submission from Michael Felt:
I have successful enough with python 2.7.10 (for building cloud-init),
including it finding openssl libraries during the installation od setuptools
(before installing pip).
I have also been able to assemble saltstack - BUT - salt-master and salt-minion
fail to start because ctypes.util.find_library() always returns 'None'.
======== EXCERPT ====
File "/opt/lib/python2.7/site-packages/salt/crypt.py", line 37, in <module>
import salt.utils.rsax931
File "/opt/lib/python2.7/site-packages/salt/utils/rsax931.py", line 69, in
<module>
libcrypto = _init_libcrypto()
File "/opt/lib/python2.7/site-packages/salt/utils/rsax931.py", line 47, in
_init_libcrypto
libcrypto = _load_libcrypto()
File "/opt/lib/python2.7/site-packages/salt/utils/rsax931.py", line 40, in
_load_libcrypto
raise OSError('Cannot locate OpenSSL libcrypto')
OSError: Cannot locate OpenSSL libcrypto
=======
I built python using the IBM compiler, and my images do not have /sbin/ldconfig
installed so the assumption that /sbin/ldconfig is always installed is "a bug".
in the util.py file the code reached is:
+219 else:
+220
+221 def _findSoname_ldconfig(name):
+222 import struct
+223 if struct.calcsize('l') == 4:
+224 machine = os.uname()[4] + '-32'
+225 else:
+226 machine = os.uname()[4] + '-64'
+227 mach_map = {
+228 'x86_64-64': 'libc6,x86-64',
+229 'ppc64-64': 'libc6,64bit',
+230 'sparc64-64': 'libc6,64bit',
+231 's390x-64': 'libc6,64bit',
+232 'ia64-64': 'libc6,IA-64',
+233 }
+234 abi_type = mach_map.get(machine, 'libc6')
+235
+236 # XXX assuming GLIBC's ldconfig (with option -p)
+237 expr = r'\s+(lib%s\.[^\s]+)\s+\(%s' % (re.escape(name),
abi_type)
+238 f = os.popen('/sbin/ldconfig -p 2>/dev/null')
+239 try:
+240 data = f.read()
+241 finally:
+242 f.close()
+243 res = re.search(expr, data)
+244 if not res:
+245 return None
+246 return res.group(1)
+247
+248 def find_library(name):
+249 return _findSoname_ldconfig(name) or
_get_soname(_findLib_gcc(name))
+250
(I have not researched _get_soname or _findLib_gcc but neither of these "feel
right" as AIX, by default, does not end library (archives) with .so (archives
end with .a and archive members frequently end with .so)
That this is/has not been reported more frequently may be because python
programmers are avoiding ctypes - when portability is essential.
I hope that, just as for Solaris - where an alternate program is used - that
AIX can have a block:
# if os.name == "posix" and sys.platform.startswith("aix"):
so that if ldconfig is not available the command /usr/bin/dump could be used
instead, and/or search LIBPATH and/or (when not empty) and/or ldd (for
programs). Ideally, /sbin/ldconfig would not be need at all!
dump output:
root@x064:[/data/prj/gnu/bashRC1-4.4]dump -Xany -H /opt/bin/python
/opt/bin/python:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x000005ac 0x000035e3 0x0000006e
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000005 0x00030ee4 0x00006772 0x00030f52
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/vac/lib:/usr/lib:/lib
1 libc.a shr.o
2 libpthreads.a shr_xpg5.o
3 libpthreads.a shr_comm.o
4 libdl.a shr.o
root@x064:[/usr/bin]dump -Xany -H /usr/lib/libcrypto.a
/usr/lib/libcrypto.a[libcrypto.so]:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x00000ff9 0x0000498a 0x00000038
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000003 0x0004f1f0 0x00014636 0x0004f228
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/lib:/lib
1 libc.a shr.o
2 libpthreads.a shr_xpg5.o
/usr/lib/libcrypto.a[libcrypto.so.0.9.8]:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x00000c4e 0x00004312 0x00000038
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000003 0x00044c48 0x0000f236 0x00044c80
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/lib:/lib
1 libc.a shr.o
2 libpthreads.a shr_xpg5.o
/usr/lib/libcrypto.a[libcrypto.so.1.0.0]:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x00000ff9 0x0000498a 0x00000038
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000003 0x0004f1f0 0x00014636 0x0004f228
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/lib:/lib
1 libc.a shr.o
2 libpthreads.a shr_xpg5.o
/usr/lib/libcrypto.a[libcrypto64.so]:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x00000ff2 0x00004987 0x0000003e
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000003 0x00061758 0x00014e03 0x00061796
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/lib:/lib
1 libc.a shr_64.o
2 libpthreads.a shr_xpg5_64.o
/usr/lib/libcrypto.a[libcrypto64.so.0.9.8]:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x00000c47 0x0000430d 0x0000003e
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000003 0x000557b0 0x0000f9e7 0x000557ee
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/lib:/lib
1 libc.a shr_64.o
2 libpthreads.a shr_xpg5_64.o
/usr/lib/libcrypto.a[libcrypto64.so.1.0.0]:
***Loader Section***
Loader Header Information
VERSION# #SYMtableENT #RELOCent LENidSTR
0x00000001 0x00000ff2 0x00004987 0x0000003e
#IMPfilID OFFidSTR LENstrTBL OFFstrTBL
0x00000003 0x00061758 0x00014e03 0x00061796
***Import File Strings***
INDEX PATH BASE MEMBER
0 /usr/lib:/lib
1 libc.a shr_64.o
2 libpthreads.a shr_xpg5_64.o
root@x064:[/usr/bin]
root@x064:[/usr/bin]echo $?
0
ldd outpath:
root@x064:[/usr/bin]ldd /opt/bin/python
/opt/bin/python needs:
/usr/lib/libc.a(shr.o)
/usr/lib/libpthreads.a(shr_xpg5.o)
/usr/lib/libpthreads.a(shr_comm.o)
/usr/lib/libdl.a(shr.o)
/unix
/usr/lib/libcrypt.a(shr.o)
root@x064:[/usr/bin]ldd /usr/lib/libcrypto.a
ldd: /usr/lib/libcrypto.a: File is an archive.
root@x064:[/usr/bin]echo $?
2
----------
components: ctypes
messages: 260861
nosy: Michael.Felt
priority: normal
severity: normal
status: open
title: ctypes.util.find_library fails ALWAYS when gcc is not used
type: behavior
versions: Python 2.7
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue26439>
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