README.md (3134B)
1 This package allows users to package python modules without creating package 2 Makefiles for each individual module and their dependencies. It provides a 3 way making packaging python packages faster and may also facilitate the process 4 of developing Makefiles for new python packages 5 6 This is a raw DEVEL only package. Using it may entail a lot of implementation 7 details and you may need to resolve target dependencies and package details on 8 your own 9 10 - Third party python packages may depend on features not included in e.g. 11 python-light 12 - Some python modules may require host install of another module to progress, 13 e.g. target cryptography requires host cffi 14 - Some python modules have external C library dependencies, e.g. pyOpenSSL 15 requires openssl libs 16 - Some packages may have an autoconf configure script whose arguments we 17 cannot control with pip and has to be passed on (hacked) by overriding some 18 environment variables 19 20 ## How it works 21 22 1. Install host modules required for building target modules 23 2. Install each target module to separate directories 24 3. Install another copy of modules for cleanup purposes to make list of 25 installed files to be removed from target modules installed in step 2 26 27 Why should it be so 28 29 1. Installing target cryptography requires host installation of cffi module 30 2. cryptography requires setuptools and pip will install its own copy with 31 --ignore-installed. When PACKAGE_python-setuptools is also selected, opkg 32 will complain of data file clashes if it was not removed here. 33 34 Pip will handle dependency requirements of python modules, but external 35 dependencies like c libraries has to be prepared by the build system. The 36 issue is that there is currently no way to express such dependencies, thus may 37 cause build failure, e.g. pycrypto requires the presence of libgmp to build 38 successfully. 39 40 ## Tips 41 42 If something goes wrong, we can add additional arguments to pip command 43 line to check the detailed build process. Some useful arguments may be 44 45 - -v, for verbose output. Repeat this option if the current level of 46 verbosity is not enough 47 - --no-clean, for preserving pip build dir on build failure 48 49 ## Examples 50 51 tornado (python-only module) 52 53 CONFIG_PACKAGE_python-packages=y 54 CONFIG_PACKAGE_python-packages-list="tornado==4.4.2" 55 56 cryptography (requires installation of host modules and cleanup on target modules) 57 58 CONFIG_PACKAGE_python-packages=y 59 CONFIG_PACKAGE_python-packages-list-host="cffi" 60 CONFIG_PACKAGE_python-packages-list="cryptography" 61 CONFIG_PACKAGE_python-packages-list-cleanup="setuptools" 62 63 pycrypto 2.7a1 (python module with autoconf configure script; depends on 64 libgmp; broken wmmintrin.h). 2.6.1 does not work because of a flaw in 65 the setup.py hardcoding host include directory 66 67 CONFIG_PACKAGE_libgmp=y 68 CONFIG_PACKAGE_python-packages=y 69 CONFIG_PACKAGE_python-packages-list="https://github.com/dlitz/pycrypto/archive/v2.7a1.tar.gz" 70 CONFIG_PACKAGE_python-packages-envs="ac_cv_header_wmmintrin_h=no build_alias=$(GNU_HOST_NAME) host_alias=$(GNU_TARGET_NAME) target_alias=$(GNU_TARGET_NAME)" 71 CONFIG_PACKAGE_python-packages-extra-deps="libgmp.so.10" 72