Fix how libmgrs.so is imported if installing with Python 3.5. #10

rguerra · 2015-10-16T12:42:16Z

I tried installing the original mgrs from hobu's repo with Python 3.5 but it couldn't find the libmgrs.so library. I later realized that I had broken the installation for Python2.7, but just fixed it in the latest commit of this branch.

…if installing with Python 3.5.

hobu · 2015-10-18T18:22:28Z

Is SOABI universal across all *nix?

rguerra · 2015-10-19T09:29:12Z

Hi,

To be honest, I don't know. I just assumed it was.

Raul

On Sun, Oct 18, 2015 at 8:22 PM, Howard Butler [email protected]
wrote:

Is SOABI universal across all *nix?

—
Reply to this email directly or view it on GitHub
#10 (comment).

hobu · 2015-10-19T13:34:02Z

Some googling shows this isn't universal. We would need a patch that detected the SOEXT reliably for all *nix before implementing this approach.

proximous · 2016-04-27T03:10:33Z

This pull request worked with Python 3.4 on Ubuntu 14.04.
I'm confused why this pull isn't accepted? Am I reading the code wrong? If SOABI is not supported, won't this pull behave like the master? So even if this pull doesn't fix "all *unix" environments, it doesn't break anything that works with the master, and does fix a very popular distribution. So this pull makes this better (though not perfect) without causing harm. I would love to see it accepted!

hobu · 2016-04-28T13:09:35Z

I'm confused why this pull isn't accepted?

For the patch to be accepted, it must reliably detect the SOEXT for all unix flavors. A specific fix for a single distribution isn't good enough.

proximous · 2016-04-28T16:43:53Z

Sorry, I'm still confused. The current master doesn't work for all distributions. So isn't a fix that makes it work in more distributions a good thing? I agree all is best, but isn't more better than less? Do you believe this fix breaks or otherwise degrades operation where the master currently works?

hobu · 2016-04-28T16:53:55Z

When I test the following with Ubuntu 15.04, it all works:

git clone https://github.com/hobu/mgrs.git
cd mgrs
python3 setup.py build
python3 setup.py test

Doctest: test.txt ... ok

----------------------------------------------------------------------
Ran 1 test in 0.013s

OK

I don't understand why this patch is needed. What is producing the incorrect libmgrs.so filename in the first place?

proximous · 2016-04-28T17:37:00Z

Thanks for taking the time to look into this and for posting your test procedure. That really helped. I get a different result with Ubuntu 14.04:

git clone https://github.com/hobu/mgrs.git  
cd mgrs
python3 setup.py build
python3 setup.py test

Doctest: test.txt ... FAIL

======================================================================
FAIL: /home/jerry/mgrs/tests/test.txt
Doctest: test.txt
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.4/doctest.py", line 2187, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for test.txt
  File "/home/jerry/mgrs/tests/test.txt", line 0

----------------------------------------------------------------------
File "/home/jerry/mgrs/tests/test.txt", line 3, in test.txt
Failed example:
    import mgrs
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python3.4/doctest.py", line 1318, in __run
        compileflags, 1), test.globs)
      File "<doctest test.txt[0]>", line 1, in <module>
        import mgrs
      File "/home/jerry/mgrs/mgrs/__init__.py", line 1, in <module>
        from . core import rt
      File "/home/jerry/mgrs/mgrs/core.py", line 35, in <module>
        rt = ctypes.CDLL(os.path.join(local_library_path, lib_name))
      File "/usr/lib/python3.4/ctypes/__init__.py", line 351, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: /home/jerry/mgrs/libmgrs.so: cannot open shared object file: No such file or directory


----------------------------------------------------------------------
Ran 1 test in 0.089s

FAILED (failures=1)

$ python3 --version
Python 3.4.3

$ python3 setup.py build
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.4
creating build/lib.linux-x86_64-3.4/mgrs
copying mgrs/core.py -> build/lib.linux-x86_64-3.4/mgrs
copying mgrs/__init__.py -> build/lib.linux-x86_64-3.4/mgrs
running build_ext
building 'libmgrs' extension
creating build/temp.linux-x86_64-3.4
creating build/temp.linux-x86_64-3.4/libmgrs
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/mgrs.c -o build/temp.linux-x86_64-3.4/libmgrs/mgrs.o
In file included from libmgrs/mgrs.c:86:0:
libmgrs/mgrs.h:255:3: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
   void initlibmgrs();
   ^
libmgrs/mgrs.h:256:3: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
   void PyInit_libmgrs();
   ^
libmgrs/mgrs.c: In function ‘Make_MGRS_String’:
libmgrs/mgrs.c:412:3: warning: field width specifier ‘*’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=]
   i += sprintf (MGRS+i, "%*.*ld", Precision, Precision, east);
   ^
libmgrs/mgrs.c:412:3: warning: field precision specifier ‘.*’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=]
libmgrs/mgrs.c:417:3: warning: field width specifier ‘*’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=]
   i += sprintf (MGRS+i, "%*.*ld", Precision, Precision, north);
   ^
libmgrs/mgrs.c:417:3: warning: field precision specifier ‘.*’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=]
libmgrs/mgrs.c: In function ‘Convert_MGRS_To_Geodetic’:
libmgrs/mgrs.c:879:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses]
   if (!error_code)
      ^
libmgrs/mgrs.c: At top level:
libmgrs/mgrs.c:1344:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
 void initlibmgrs() {}
      ^
libmgrs/mgrs.c:1345:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
 void PyInit_libmgrs() {}
      ^
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/utm.c -o build/temp.linux-x86_64-3.4/libmgrs/utm.o
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/ups.c -o build/temp.linux-x86_64-3.4/libmgrs/ups.o
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/tranmerc.c -o build/temp.linux-x86_64-3.4/libmgrs/tranmerc.o
libmgrs/tranmerc.c: In function ‘Convert_Transverse_Mercator_To_Geodetic’:
libmgrs/tranmerc.c:487:10: warning: variable ‘s’ set but not used [-Wunused-but-set-variable]
   double s;       /* Sine of latitude                        */
          ^
x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/polarst.c -o build/temp.linux-x86_64-3.4/libmgrs/polarst.o
x86_64-linux-gnu-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.4/libmgrs/mgrs.o build/temp.linux-x86_64-3.4/libmgrs/utm.o build/temp.linux-x86_64-3.4/libmgrs/ups.o build/temp.linux-x86_64-3.4/libmgrs/tranmerc.o build/temp.linux-x86_64-3.4/libmgrs/polarst.o -o build/lib.linux-x86_64-3.4/libmgrs.cpython-34m.so

$ python3 setup.py test                              
running test
running egg_info
creating mgrs.egg-info
writing requirements to mgrs.egg-info/requires.txt
writing mgrs.egg-info/PKG-INFO
writing dependency_links to mgrs.egg-info/dependency_links.txt
writing top-level names to mgrs.egg-info/top_level.txt
writing manifest file 'mgrs.egg-info/SOURCES.txt'
reading manifest file 'mgrs.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'mgrs.egg-info/SOURCES.txt'
running build_ext
copying build/lib.linux-x86_64-3.4/libmgrs.cpython-34m.so -> 
/home/jerry/mgrs/tests/test.txt
Doctest: test.txt ... FAIL

======================================================================
FAIL: /home/jerry/mgrs/tests/test.txt
Doctest: test.txt
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.4/doctest.py", line 2187, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for test.txt
  File "/home/jerry/mgrs/tests/test.txt", line 0

----------------------------------------------------------------------
File "/home/jerry/mgrs/tests/test.txt", line 3, in test.txt
Failed example:
    import mgrs
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python3.4/doctest.py", line 1318, in __run
        compileflags, 1), test.globs)
      File "<doctest test.txt[0]>", line 1, in <module>
        import mgrs
      File "/home/jerry/mgrs/mgrs/__init__.py", line 1, in <module>
        from . core import rt
      File "/home/jerry/mgrs/mgrs/core.py", line 35, in <module>
        rt = ctypes.CDLL(os.path.join(local_library_path, lib_name))
      File "/usr/lib/python3.4/ctypes/__init__.py", line 351, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: /home/jerry/mgrs/libmgrs.so: cannot open shared object file: No such file or directory


----------------------------------------------------------------------
Ran 1 test in 0.089s

FAILED (failures=1)

proximous · 2016-04-28T18:48:38Z

I also have an Ubuntu 15.10 system with an ARM processor. I tried it there...same failure:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 15.10
Release:    15.10
Codename:   wily

$ python3 --version                     
Python 3.4.3+

$ python3 setup.py build
running build
running build_py
creating build
creating build/lib.linux-armv7l-3.4
creating build/lib.linux-armv7l-3.4/mgrs
copying mgrs/core.py -> build/lib.linux-armv7l-3.4/mgrs
copying mgrs/__init__.py -> build/lib.linux-armv7l-3.4/mgrs
running build_ext
building 'libmgrs' extension
creating build/temp.linux-armv7l-3.4
creating build/temp.linux-armv7l-3.4/libmgrs
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/mgrs.c -o build/temp.linux-armv7l-3.4/libmgrs/mgrs.o
In file included from libmgrs/mgrs.c:86:0:
libmgrs/mgrs.h:255:3: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
   void initlibmgrs();
   ^
libmgrs/mgrs.h:256:3: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
   void PyInit_libmgrs();
   ^
libmgrs/mgrs.c: In function ‘Make_MGRS_String’:
libmgrs/mgrs.c:412:25: warning: field width specifier ‘*’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=]
   i += sprintf (MGRS+i, "%*.*ld", Precision, Precision, east);
                         ^
libmgrs/mgrs.c:412:25: warning: field precision specifier ‘.*’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=]
libmgrs/mgrs.c:417:25: warning: field width specifier ‘*’ expects argument of type ‘int’, but argument 3 has type ‘long int’ [-Wformat=]
   i += sprintf (MGRS+i, "%*.*ld", Precision, Precision, north);
                         ^
libmgrs/mgrs.c:417:25: warning: field precision specifier ‘.*’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat=]
libmgrs/mgrs.c: In function ‘Convert_MGRS_To_Geodetic’:
libmgrs/mgrs.c:879:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses]
   if (!error_code)
      ^
libmgrs/mgrs.c: At top level:
libmgrs/mgrs.c:1344:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
 void initlibmgrs() {}
      ^
libmgrs/mgrs.c:1345:6: warning: function declaration isn’t a prototype [-Wstrict-prototypes]
 void PyInit_libmgrs() {}
      ^
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/utm.c -o build/temp.linux-armv7l-3.4/libmgrs/utm.o
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/ups.c -o build/temp.linux-armv7l-3.4/libmgrs/ups.o
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/tranmerc.c -o build/temp.linux-armv7l-3.4/libmgrs/tranmerc.o
libmgrs/tranmerc.c: In function ‘Convert_Transverse_Mercator_To_Geodetic’:
libmgrs/tranmerc.c:487:10: warning: variable ‘s’ set but not used [-Wunused-but-set-variable]
   double s;       /* Sine of latitude                        */
          ^
arm-linux-gnueabihf-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -I./libmgrs -I/usr/include/python3.4m -c libmgrs/polarst.c -o build/temp.linux-armv7l-3.4/libmgrs/polarst.o
arm-linux-gnueabihf-gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector-strong -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-armv7l-3.4/libmgrs/mgrs.o build/temp.linux-armv7l-3.4/libmgrs/utm.o build/temp.linux-armv7l-3.4/libmgrs/ups.o build/temp.linux-armv7l-3.4/libmgrs/tranmerc.o build/temp.linux-armv7l-3.4/libmgrs/polarst.o -o build/lib.linux-armv7l-3.4/libmgrs.cpython-34m.so

$ python3 setup.py test
running test
running egg_info
creating mgrs.egg-info
writing top-level names to mgrs.egg-info/top_level.txt
writing requirements to mgrs.egg-info/requires.txt
writing mgrs.egg-info/PKG-INFO
writing dependency_links to mgrs.egg-info/dependency_links.txt
writing manifest file 'mgrs.egg-info/SOURCES.txt'
reading manifest file 'mgrs.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'mgrs.egg-info/SOURCES.txt'
running build_ext
copying build/lib.linux-armv7l-3.4/libmgrs.cpython-34m.so -> 
/home/linaro/workspace/mgrs/tests/test.txt
Doctest: test.txt ... FAIL

======================================================================
FAIL: /home/linaro/workspace/mgrs/tests/test.txt
Doctest: test.txt
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3.4/doctest.py", line 2187, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for test.txt
  File "/home/linaro/workspace/mgrs/tests/test.txt", line 0

----------------------------------------------------------------------
File "/home/linaro/workspace/mgrs/tests/test.txt", line 3, in test.txt
Failed example:
    import mgrs
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python3.4/doctest.py", line 1318, in __run
        compileflags, 1), test.globs)
      File "<doctest test.txt[0]>", line 1, in <module>
        import mgrs
      File "/home/linaro/workspace/mgrs/mgrs/__init__.py", line 1, in <module>
        from . core import rt
      File "/home/linaro/workspace/mgrs/mgrs/core.py", line 35, in <module>
        rt = ctypes.CDLL(os.path.join(local_library_path, lib_name))
      File "/usr/lib/python3.4/ctypes/__init__.py", line 351, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: /home/linaro/workspace/mgrs/libmgrs.so: cannot open shared object file: No such file or directory


----------------------------------------------------------------------
Ran 1 test in 0.307s

FAILED (failures=1)

hobu · 2016-04-28T19:42:43Z

Ok, the SOABI is from Python's environment, not Ubuntu's. I was confused. I see https://www.python.org/dev/peps/pep-3149/ says this is the way to do it now.

Thanks for continuing to press.

proximous · 2016-04-28T19:56:07Z

Thanks for taking the time to review and for making the package available!!

Is this something you will push to pypi? I love the convenience of just doing a pip to install.

hobu · 2016-04-28T19:57:17Z

Is this something you will push to pypi?

I will clean up the warnings first and then I'll push a new release.

hobu · 2016-04-28T20:08:29Z

done. https://pypi.python.org/pypi/mgrs

proximous · 2016-04-28T20:13:30Z

Fantastic! Thanks!

rguerra added 2 commits October 15, 2015 13:34

Create a branch calle bug-libmgrs and fix how libmgrs.so is imported …

8310b68

…if installing with Python 3.5.

Make the bug-libmgrs fix work with Python2.7

1375709

hobu merged commit e49d006 into hobuinc:master Apr 28, 2016

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Fix how libmgrs.so is imported if installing with Python 3.5. #10

Fix how libmgrs.so is imported if installing with Python 3.5. #10

rguerra commented Oct 16, 2015

hobu commented Oct 18, 2015

rguerra commented Oct 19, 2015

hobu commented Oct 19, 2015

proximous commented Apr 27, 2016

hobu commented Apr 28, 2016 •

edited

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proximous commented Apr 28, 2016

hobu commented Apr 28, 2016

proximous commented Apr 28, 2016

hobu commented Apr 28, 2016

hobu commented Apr 28, 2016

proximous commented Apr 28, 2016

Fix how libmgrs.so is imported if installing with Python 3.5. #10

Fix how libmgrs.so is imported if installing with Python 3.5. #10

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rguerra commented Oct 16, 2015

hobu commented Oct 18, 2015

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proximous commented Apr 28, 2016

hobu commented Apr 28, 2016 •

edited

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