Python: Warning and after Error using SCons - python

I am trying to install the openWSN platform on my MAC OS X, to be able to run tests in a simulated (or real) sensors network. For that, is necessary the Python development headers and libraries. In fact, I think the headers are already installed, as I have already downloaded XCode, Command Line Tools, Homebrew, and I already downloaded the Python.
I am using SCons to construct the software application.
The big problem is that when I type this command on the terminal:
$ scons board=python toolchain=gcc oos_openwsn
The processing seems to be going well, when I receive the following warning and error:
File "/Users/stage/Desktop/openwsn/openwsn-fw/SConscript", line 578, in sconscript_scanner
scons: done reading SConscript files.
scons: Building targets ...
Linking (shared) firmware/openos/projects/common/oos_openwsn.so
**ld: warning: directory not found for option '-L/Library/Frameworks/Python.framework/Versions/2.7/libs'**
ld: unknown option: -Bsymbolic-functions
clang: error: linker command failed with exit code 1 (use -v to see invocation)
scons: *** [firmware/openos/projects/common/oos_openwsn.so] Error 1
scons: building terminated because of errors.
The problem to me seems to be in the libs folder, as if the scons could not find this folder, and cannot proceed.

I checked the SCons files for the project https://github.com/openwsn-berkeley/openwsn-fw that you seem to be using. I don't see any hints that the compilation and installation of sources is supported for MacOS. Are you sure that the project supports your OS? If you are, you should consider asking the project's maintainers for help, e.g. via ML or IRC.
The main error in your output above is the "ld: unknown option: -Bsymbolic-functions". Since you specified "toolchain=gcc" in your call, this is what the build expects...but you don't seem to have a proper gcc installed. The clang compiler that is found instead doesn't know the provided command-line option, and stops with an error.

Related

LINK : fatal error LNK1104: cannot open file 'python37_d.lib'

I was trying to integrate Python interpreter in C++ application in Visual Studio 2013, despite of adding INCLUDES and ENV VARIABLES such as LIB & LIBPATH, compilation is throwing an Error as
LINK : fatal error LNK1104: cannot open file 'python37_d.lib'.
I tried all possible google suggestions, but still I am not able get rid of this Error. Any help on this would be highly appreciated.
This library is intended for debugging, and you simply don't have it if the Python was installed with default options. To obtain it, you are to (re)install Python with "Download debug binaries" option enabled in the installer. Then the python37_d.lib will be located in %PythonPath%\Libs together with python3_d.lib.
Following up the Suthiro's answer, you can also explicitly specify Debug or Release configurations for multi-configuration generators (Ninja Multi-Config, Visual Studio) by running
# Configure the build
cmake -S . -B build
# Actually build the binaries
cmake --build build --config Release
in your source directory.
For single configuration generators and more details see this answer https://stackoverflow.com/a/64719718/15452880.

Cross-compiling for Windows Python error

I try to cross-compile libplist (https://github.com/libimobiledevice/libplist) for 64-bit Windows and create a DLL from it. I downloaded mingw-w64 for Linux subsystem on Windows 10 (Ubuntu 14.04 bash) and set the environment variables (CC, CXX, CPP, RANLIB). I use ./autogen.sh --host=x86_64-w64-mingw32 to configure package. However it exits with the error:
configure:16825: error:
Could not link test program to Python. Maybe the main Python library has been
installed in some non-standard library path. If so, pass it to configure,
via the LDFLAGS environment variable.
Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
============================================================================
ERROR!
You probably have to install the development version of the Python package
for your distribution. The exact name of this package varies among them.
============================================================================
In config.log it says:
configure:16813: x86_64-w64-mingw32-gcc -o conftest.exe -g -O2 -I/usr/include/python2.7 -I/usr/include/x86_64-linux-g$
In file included from /usr/include/python2.7/Python.h:8:0,
from conftest.c:33:
/usr/include/python2.7/pyconfig.h:78:3: error: #error unknown multiarch location for pyconfig.h
# error unknown multiarch location for pyconfig.h
^
In file included from /usr/include/python2.7/pyport.h:4:0,
from /usr/include/python2.7/Python.h:58,
from conftest.c:33:
/usr/include/python2.7/pyconfig.h:78:3: error: #error unknown multiarch location for pyconfig.h
# error unknown multiarch location for pyconfig.h
^
In file included from /usr/include/python2.7/pymath.h:4:0,
from /usr/include/python2.7/Python.h:77,
from conftest.c:33:
/usr/include/python2.7/pyconfig.h:78:3: error: #error unknown multiarch location for pyconfig.h
# error unknown multiarch location for pyconfig.h
^
configure:16813: $? = 1
It doesn't return this error when I try to compile it for Linux, so I thought that it's because it needs python libraries compiled for Windows x86_64. I copied the appropriate files from Windows from C:/Python27/include and tried to set environment variable for configuration LDFLAGS="-L/path/to/python/include" and PKG_CONFIG_PATH=/path/to/python/include separately. Neither of them worked. I also noticed, that in C:/Python27/include there was also a file called pyconfig.h.Why does the script uses the one installed on Linux? Is there a way I could force it to use the other one?
My main objective would be to make a 64-bit Windows DLL from libusbmuxd (https://github.com/libimobiledevice/libusbmuxd), but it needs libplist to be compiled too. How could I solve this issue? Thanks for the answers in advance.
You can try libimobiledevice-win32. Although the name is a bit confusing, it builds 32-bit and 64-bit Windows versions of libimobiledevice.
You can compile libplist, libusbmuxd, libimobildevice and the various utilities for Windows using Visual Studio, avoiding the need to cross compile.
The company I work for, Quamotion, maintains libimobiledevice-win32 and we try to stay on track with the latest upstream changes.
You can download precompiled versions from the CI build, see e.g. https://ci.appveyor.com/project/qmfrederik/imobiledevice-net/build/artifacts for zip files which contain the latest bits.

Error when attempting to build Python from source in Cygwin

From all that I've read, I get the impression that building from source (relatively speaking) is pretty easy within Cygwin. However, when I installed the base package along with gcc and attempted to build Python 2.7.8 from source, I got the following error from running ./configure:
checking whether we are cross compiling... configure: error: in `/cygdrive/h/Python-2.7.8':
configure: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
See `config.log' for more details
Upon opening config.log, I see this:
configure:3978: checking whether we are cross compiling
configure:3986: gcc -o conftest.exe conftest.c >&5
configure:3990: $? = 0
configure:3997: ./conftest.exe
./configure: line 3999: ./conftest.exe: Permission denied
configure:4001: $? = 126
configure:4008: error: in `/cygdrive/h/Python-2.7.8':
configure:4010: error: cannot run C compiled programs.
If you meant to cross compile, use `--host'.
I'm not sure I understand exactly what the issue is. It appears to attempt to compile conftest.c into conftest.exe (which appears to work?) and subsequently attempts to run the executable but gets denied on the basis of permission.
Any thoughts or insights on where to go from here?
Turns out I had inadvertantly installed the wrong GCC package. Rolling back all of the the development package installs and just installing GNU GCC 4.8.3 resolved the above.

unable to install graph-tool in windows 7

I'd like to use graph-tool on windows 7, but I'm having trouble installing it.
All the requirements listed here are successfully installed. Python 2.7 is installed in C:\python27. Boost 1.49.0 was successfully compiled with mingw, installed in C:\boost and the BOOST_ROOT environment variable is pointing to it. Boost is compiled in debug and release mode and both static and dynamic.
Invoking configure from within MSyS leads to the following error.
configure: error:
Could not link test program to Python. Maybe the main Python library has been
installed in some non-standard library path. If so, pass it to configure,
via the LDFLAGS environment variable.
Example: ./configure LDFLAGS="-L/usr/non-standard-path/python/lib"
============================================================================
ERROR!
You probably have to install the development version of the Python package
for your distribution. The exact name of this package varies among them.
============================================================================
Calling configure LDFLAGS="-LC:/python27/libs" fixed this error, but lead to the following error
checking for boostlib >= 1.38.0... configure: error: We could not detect the boo
st libraries (version 1.38 or higher). If you have a staged boost library (still
not installed) please specify $BOOST_ROOT in your environment and do not give a
PATH to --with-boost option. If you are sure you have boost installed, then ch
eck your version number looking in <boost/version.hpp>. See http://randspringer.
de/boost for more documentation.
This is weird, since BOOST_ROOT is clearly defined (checked it with printenv command).
The next command I tried was configure --with-boost="C:/boost" LDFLAGS="-LC:/python27/libs"
checking for boostlib >= 1.38.0... yes
checking whether the Boost::Python library is available... no
configure: error: No usable boost::python found
Alright it detects boost, but It can't find boost::python. Due to its size I'm unable to post the config.log on stackoverflow but you can find it here.
I'm really confused right now and would appreciate any help.
I have zero experience with compiling graph-tool (or anything else) for windows, but the following part of your config.log stands out:
configure:17224: checking whether the Boost::Python library is available
configure:17254: g++ -c -Wall -ftemplate-depth-150 -Wno-deprecated -Wno-unknown-pragmas -O99 -fvisibility=default -fvisibility-inlines-hidden -Wno-unknown-pragmas -Ic:\python27\include conftest.cpp >&5
conftest.cpp:32:36: fatal error: boost/python/module.hpp: No such file or directory
compilation terminated.
Note how the boost path you passed is not being used! Try to pass CXXFLAGS="-IC:\boost\include" to configure as well.
May be something like this would help:
./configure --prefix=/usr/
for windows path is different, try it yourself.

Compiling Python Extension On Windows With Cygwin

I have been having a terrible time trying to compile a python extension - hopefully someone can help.
I initially tried executing 'python.exe setup.py build' but received the error: 'Python was built Visual Studio 2003; extensions must be built with a compiler that can generate compatible binaries...".
So I then downloaded Cygwin, and have tried sending the switch '-c mingw32'. A few lines were written into the console - then I get the error message: command 'gcc' failed: Permission denied.
I was initially using the Visual Studio 2010 Command Line to do this, but tried with bash and got the same result.
I have spent a considerable amount of time researching the issue, and it appears Cygwin uses symlinks for gcc and g++, and windows doesn't understand how to handle this.
How exactly can I force setup.py to use gcc-3.exe instead of the gcc.exe symlink?
I know it's inelegant, but you can rename the symlink and copy gcc-3.exe to gcc.exe. That worked for me when I used Cygwin's gcc. You might want to switch to the mingw64-i686 (or mingw64-x86_64) package to get gcc 4.5.3, or just install MinGW-w64 separately for compiling under Windows.
Also, you can permanently configure distuilts in PythonXX\Lib\distutils\distutils.cfg:
[build]
compiler = mingw32
[build_ext]
compiler = mingw32
[build_clib]
compiler = mingw32

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