- June 30, 2021
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Use the --c-core-version switch to try a different version. Installation igraph is on the Python Package Index so it can be installed using pip or easy_install: $ pip install python-igraph If the C core of igraph has already been installed to a location that can be detected using pkg-config, pip will compile and link the extension to the C core that you have installed. / usr / local / bin / gcc checking whether the C compiler works... no configure: error: in ` / tmp / RtmpPaaksz / R.INSTALL8c157a39a973 / igraph ': configure: error: C compiler cannot create executables See `config.log' for more details ERROR: configuration failed for package ‘igraph’ It is R specific, so I don't think it is very useful for you. Do not worry, though, there are precompiled packages for the major operating systems, so you will not have to compile igraph from source unless you use an esoteric operating system or you have specific requirements (i.e., adding a custom patch to igraph‘s C core). Pass function call as a function argument. brew install igraph. 24. Version number of the C core: 0.7.1.post6. I am currently being bitten by igraph/igraph#858, which was fixed a short while after but does not seem to have made it in. WARNING: we were not able to detect where igraph is installed on your machine (if it is installed at all). Both. Could not download and compile the C core of igraph. libxml2 seems to be installed (i.e. a apt-get install libxml2 does not install anything), so how to fix those issues? Discussion about igraph development and features. tamas 14 September 2020 09:39 #2 If python-igraph still fails to install, see the question on compiling igraph.Alternatively consider installing gcc via brew install gcc--without-multilib and exporting the required variables: We will also try: 0.7.1 Version 0.7.1.post6 of the C core of igraph is not found among the nightly builds. By the way, I'm slightly worried by the fact that the output above says "C:\Program Files (x86)" and not "C:\Program Files"; this seems to indicate that Visual Studio is 32-bit and not 64-bit, so the igraph core you compiled with it and the Python interface you are about to compile might also be compiled for 32-bit. Do not worry, though, there are precompiled packages for the major operating systems, so you will not have to compile igraph from source unless you use an esoteric operating system or you have specific requirements (i.e., adding a custom patch to igraph‘s C core). Cannot find the C core of igraph on this system using pkg-config. Version number of the C core: 0.7.1-1. Use Microsoft Visual Studio to compile the C core and then use a version of Python downloaded from python.org to compile the Python interface as well (using the usual "python setup.py install" command, which will in turn use Visual Studio of course). Try re-running configure with the '--disable-dependency-tracking' option to at least be able to build the package (albeit without support for automatic dependency tracking). See `config.log' for more details Could not compile the C core of igraph. Could not download and compile the C core of igraph. You can now build and install python-igraph again by simply running python setup.py build. Please make sure to use a clean source tree, if you built previously without GraphML, it will not update the build. The source code of the Python package includes the source code of the matching igraph version that the Python interface should compile against. You can "unpack" the … Hope you can help with this problem, thanks. Version 0.7.1.post6 of the C core of igraph is not found among the nightly builds. jeremydouglass commented on May 6, 2018 I encountered the same problem (igraph unable to link to or build missing C core) while working with OS X 10.12 and Python2. Questions about using igraph. Use the --c-core-version switch to try a different version. Hi Winnie, As far as I know, there are basically two options for compiling the C core and the Python interface from scratch on Windows: 1. Instead of letting pip compile the C core for you, you can install Homebrew and the homebrew/science/igraph formula. Version 0.7.1.post6 of the C core of igraph is not found among the nightly builds. Use the --c-core-version switch to try a different version. Version number of the C core: 0.7.1.post6 We will also try: 0.7.1. We will now try to download and compile the C core from scratch. WARNING: we were not able to detect where igraph is installed on your machine (if it is installed at all). 2. sudo apt-get install -y libigraph0-dev 再继续安装python-igraph Everything goes well until " Open the MSYS2 shell, enter this folder and run python setup.py build_c_core ". Site Feedback. Could not download and compile the C core of igraph. Could not download and compile the C core of igraph. The problem is actually that you will have to install libxml2-dev in order to compile the C core of igraph (because the GraphML reader needs it). But when it comes to compiling the python interface I encounter another problem that I didnt realize: My cygwin does not have the python package installed and uses the python I obtained from python.org . I tried to use cygwin and was successfull compiling the C-core of igraph without any problems. igraph is also available in several package managers: vcpkg: vcpkg install igraph; MacPorts (macOS): sudo port install igraph > > Can you give me some hints on how you built igraph using the mingw > toolchain? As noted in the previous response on the igraph list, a key reason to use R (or Python) rather than coding in C is that you get a great deal more flexibility in exploring algorithmic variations if you use a higher-level language. Use the --c-core-version switch to try a different version. On MacOS, if not using conda, you might need to install the C core of igraph via homebrew first. Version number of the C core: 0.7.1.post6 We will also try: 0.7.1. Use the --c-core-version switch to try a different version. ----- ERROR: Failed building wheel for leidenalg Failed to build leidenalg ERROR: Could not build wheels for leidenalg which use PEP 517 and cannot be installed directly` Note that I am able to install leidenalg version 0.7.0. Development. We will now try to download and compile the C core from scratch. Usage. 然而在执行sudo pip install python-igraph时报错. ` Cannot find the C core of igraph on this system using pkg-config. cmake --install. Second, call IGRAPH_FINALLY on each dynamically allocated object and call IGRAPH_FINALLY_CLEAN () with the proper argument before returning. For compiling this program you need a C compiler, if this is called gcc and the previous code is saved in file igraph_test.c, you will need a command like this: gcc igraph_test.c -I/usr/local/igraph -L/usr/local/lib -ligraph -o igraph_test The exact form depends on where igraph was installed on your system. After running the command, I got some errors which show “Could not compile the C core of igraph”. igraph uses a CMake-based build system from version 0.9.0. If you downloaded a tarball, you also need to remove the vendor/source/igraph folder because the setup script will look for the vendored igraph copy first. However, a particular version of python-igraph is guaranteed to work only with the version of the C core that is bundled with it (or with the revision that the git submodule points to). We will use the fallback Showcase and Applications. a apt-get install libxml2 does not install anything), so how to fix those issues? This will ensure that the C core is found by pip so running pip install python-igraph will compile the Python interface only and link it to the C core. 66. 本来想忽略这个问题，但是后续步骤会继续报错，没办法必须解决这个问题才行。网上的解决方法是先执行. Could not download and compile the C core of igraph. We will use the fallback library and include pathss hardcoded in setup.py and hope that the C core of igraph is installed there. Use the --c-core-version switch to try a different version. Showcasing igraph features and applications. We will now try to download and compile the C core from scratch. Could not compile the C core of igraph. Use the --c-core-version switch to try a different version. This is reported correctly by the install log, the problem is that pip has a bug that hides this and reports the UnicodeDecodeError above (due to an obscure character that is present somewhere in the compiler output). WARNING: we were not able to detect where igraph is installed on your machine (if it is installed at all). Version 0.7.1-1 of the C core of igraph is not found among the nightly builds. Could not compile the C core of igraph. Version number of the C core: 0.7.1.post6 We will also try: 0.7.1. Could not download and compile the C core of igraph. Cannot find the C core of igraph on this system using pkg-config. If you downloaded a tarball, you also need to remove the vendor/source/igraph folder because the setup script will look for the vendored igraph copy first. 189. The solution is to install igraph's C core via Homebrew, and then force pip to explicitly avoid linking to this incorrect library from Anaconda Python. The functions are returning tuples, because return only gives back one item. I am able to work around the problem, but it would be nice to have a newer igraph version in PyPI so I can save myself some lines of code. If you need to compile python-igraph from source for some reason, you need to install some dependencies first: This should compile the C core of igraph as well as the Python extension automatically. The source code of the Python package includes the source code of the matching igraph version that the Python interface should compile against. Could not download and compile the C core of igraph. Questions about installing or compiling igraph. Dear William, I've had some experience implementing routing algorithms based on shortest paths using R, C and igraph. Third, use IGRAPH_CHECK on all igraph … We will now try to download and compile the C core from scratch. First, check the arguments of the functions and call IGRAPH_ERROR () if they are invalid. The above advice worked for me: It can be compiled and installed with the following list of commands: mkdir build && cd build cmake .. cmake --build. Version number of the C core: 0.7.1-1 Version 0.7.1-1 of the C core of igraph is not found among the nightly builds. > Did you compile a 32 or a 64 bit executable? Hi @namow, Do you really need the newest version of igraph package ? On Mon, Sep 7, 2015 at 6:25 PM, Szabolcs Horvát
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