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Implemented python version checking in configure.

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Details:
- Added python version checking to configure script. (Recall that python
  is needed to execute the flatten-headers.py script.) Minimum versions
  of python needed are currently as follows:
    python2: 2.7 or later
    python3: 3.5 or later
  The standard search order for python interpeters is:
    python python3 python2
  The PYTHON environment variable is also supported and will be checked
  before the standard search order list.
- Updated BuildSystem.md to include: a minimum make version; mention
  that the C compiler must actually be a C99 compiler; and the caveat
  that Windows builds do not require pthreads since BLIS can provide
  an implementation of pthreads internally.
This commit is contained in:
Field G. Van Zee
2018-10-19 15:54:15 -05:00
parent 53c07035ef
commit 4e38a8d4ee
2 changed files with 124 additions and 18 deletions
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6
docs/BuildSystem.md
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@@ -22,10 +22,10 @@ The BLIS build system was designed for use with GNU/Linux (or some other sane UN
* Python (2.7 or later)
* GNU `bash` (3.2 or later)
* GNU `make`
* a working C compiler
* GNU `make` (3.81 or later)
* a working C99 compiler
BLIS also requires a POSIX threads library at link-time (`-lpthread` or `libpthread.so`). This requirement holds even when configuring BLIS with multithreading disabled (the default) or with multithreading via OpenMP (`--enable-multithreading=openmp`).
BLIS also requires a POSIX threads library at link-time (`-lpthread` or `libpthread.so`). This requirement holds even when configuring BLIS with multithreading disabled (the default) or with multithreading via OpenMP (`--enable-multithreading=openmp`). (Note: BLIS implements basic pthreads functionality automatically for Windows builds via [AppVeyor](https://ci.appveyor.com/project/shpc/blis/).)
Finally, we also require various other shell utilities that are so ubiquitous that they are not worth mentioning (such as `mv`, `mkdir`, `find`, and so forth). If you are missing these utilities, then you have much bigger problems than not being able to build BLIS.