Hello, Following up on my related INSTALL email, here are two thoughts/proposals about the minimum versions in the build systems:
1. Make minimum versions in the build systems consistent I think that one set of minimum versions should be agreed upon and enforced in both autoconf and CMake. As the vcproj build system is deprecated, updating it isn't worth it IMHO. 2. Raise the minimum versions for some of the dependencies As most of the minimum versions are 10 to 25 years old and are EOL, I think that we might consider raising them in the future. Wouldn't it let simplify some of the build and SVN code used for compatibility with certain old deps? Please let me know what you think. The following table shows the minimum versions in INSTALL and the *explicit* version checks in each build system: +----------------+---------+----------+--------+---------+ | Dependency | INSTALL | autoconf | CMake | vcproj | +----------------+---------+----------+--------+---------+ | APR | 1.4 | 1.4 | - | 1.4.0 | | APR-Util | 1.3 | 1.3 | - | 1.3.0 | | SQLite | 3.24.0 | 3.24.0 | - | 3.24.0 | | Serf | 1.3.4 | 1.3.4 | 1.3.4 | 1.3.4 | | httpd | 2.2 | 2.2 | - | 2.2.0 | | LZ4 | r129 | r129 | - | bundled | | zlib | - | - | - | 1.2.5 | | Cyrus SASL | - | - | 2.0.0 | 2.0.0 | | gettext | - | - | - | 0.14.1 | | Python | 3.6 | 2.7 | - | - | | SWIG | - | 1.3.40* | - | 1.3.25 | | SWIG, Python 3 | - | 3.0.10 | 3.0.10 | 3.0.10 | | Perl | - | 5.8.0 | - | - | | Berkeley DB | 4.0.14 | 4.0.14 | n/a | 4.0 | +----------------+---------+----------+--------+---------+ - = no explicit check n/a = not supported bundled = only the bundled copy is used * = shows warning only The versions are from trunk: autoconf[1][2][3], CMake[4], vcproj[5]. There are also restrictions that are *implicit*, i.e. the build systems require a library without comparing version numbers. So although the build systems don't check for an explicit minimum version, the version is still enforced. AFAIK, this is true at least for Cyrus SASL (configure requires libsasl2, so the version is at least 2.0) and for Python (CMake looks for the Python3 CMake package). CMake doesn't check the versions of APR, APR-Util, SQLite and httpd. Only vcproj checks zlib and gettext. As for Python, configure accepts 2.7 and CMake accepts any 3.x, whereas INSTALL says 3.6, which is what the test suite actually requires. Thank you! [1]: https://svn.apache.org/viewvc/subversion/trunk/configure.ac?view=markup [2]: https://svn.apache.org/viewvc/subversion/trunk/build/ac-macros/ [3]: https://svn.apache.org/viewvc/subversion/trunk/build/find_python.sh?view=markup [4]: https://svn.apache.org/viewvc/subversion/trunk/CMakeLists.txt?view=markup [5]: https://svn.apache.org/viewvc/subversion/trunk/build/generator/gen_win_dependencies.py?view=markup -- With best regards, Pavel Lyalyakin
