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With per-package directory support, Python external modules are causing a problem: the _sysconfigdata.py module installed by the Python interpreter contains a number of paths that are relative to the current package per-package directory, i.e python or python3. For example: 'BLDSHARED': '/home/thomas/projets/buildroot/output/per-package/python/host/bin/arm-linux-gcc -shared', 'CC': '/home/thomas/projets/buildroot/output/per-package/python/host/bin/arm-linux-gcc', 'CXX': '/home/thomas/projets/buildroot/output/per-package/python/host/bin/arm-linux-g++', etc. These paths are problematic, because it means that the wrong compiler gets used when building external Python modules: instead of using the compiler from the external Python module per-package host directory, it uses the one from the 'python' or 'python3' per-package host directory. Due to this, any native dependency needed by the external Python module is not found, even though it is properly present in the current package per-package directory. Of course, the problem occurs with both target Python modules and host Python modules. To fix this, we simply rewrite those paths in _sysconfigdata.py before building a Python package. Interestingly, until now, the _sysconfidata.py that was used during the build was the one from $(TARGET_DIR), which is a bit unusual: it is more common to use files from $(STAGING_DIR) during the build process. So this commit changes the PYTHON_PATH and PYTHON3_PATH variables so that they point to $(STAGING_DIR), which makes the _sysconfigdata.py fixup in $(STAGING_DIR) effective. Fixes: http://autobuild.buildroot.net/results/a24b0555fd4261b50dc3986635c30717d9cbe764/ (python-psycopg2) http://autobuild.buildroot.net/results/080fa893e1b0e7a8c8a31ac1c98eb8871b97264d/ (python-alsaaudio) http://autobuild.buildroot.net/results/79bc070f98d6d9d8ef78df12b248cdc7d0e405c3/ (python-lxml) and many more Python packages that use native code with a native library Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches