I know I started a reply. I hate phones (for replies)... On 03/08/2019 12:16, Ronald Oussoren via Distutils-SIG wrote: > For macOS GCC and clang generate compatible code, that’s not a problem. Win! for macOS! > > For platform versions the situation is slightly more complicated, but it is > in general possible to > build on newer releases of macOS than you deploy on. However, this requires > some > support from the code you are building, such as not using APIs that aren’t > available on the > older version. That generally can cause issues with projects that use > configure and can > automatically pick up symbols available on the build platform. > > The Linux setup might be more interesting for you in that regard. The > “manylinux” project [1] specifies how to build wheels that work on multiple > linux versions, regardless of the version of libc. In short this works by > building with an older libc, to ensure that the wheels only use symbol > versions that are available on all supported linux versions.
To an extent - support for a "manylinux" approach is "built-in" to AIX. In practice, AIX has traditionally been 'friendly' to applications coming in binary form AIX built on older versions. There have been two releases where it was announced - there are potential issues (when AIX 5.0 and AIX 5.1 came - 64-bit applications had to be re-compiled. and AIX 5.3 TL6 to AIX 5.3TL7 - some applications "broke" - so back around 1999-2000 and 2005-2006 time frames. With the introduction of AIX 6.1 TL0 (and, in parallel AIX 5.3 TL7) IBM AIX offered, rather assured - binary compatibility when they linked against shared libraries (such as libc, aka - the "stuff" in /usr/lib). Also specified - an application linked against AIX 7.2 TL3 libraries will not run on AIX 7.1 or earlier versions of AIX - actually, assume it will not run on AIX 7.2 TL2 or earlier). Starting with Python 3.8 - sys.platform() will just say "aix", just as sys.platform() has just said "linux" since, iirc Python 3.2. (FYI). So, I'll read up on "manylinux" to see what I can lean on (read 'borrow'). I will be grateful for feedback! > > [1] https://github.com/pypa/manylinux <https://github.com/pypa/manylinux> > > Ronald >
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