On 06/09/18 15:06, Torbjörn Granlund wrote:
Mișu Moldovan <[email protected]> writes:
Just wanted to let you know I found a workaround for this particular
issue. We are able to build GMP on HP-UX with more than 2 threads
using the HP-UX C++ compiler, when invoked as an ANSI C compiler, for
example with CC="/opt/aCC/bin/aCC -Ae". Maybe worth documenting on
your side?
Are you saying that a parallel build fails with one compiler and works
with another, and that the "make" command is somehow of less importance?
Both are important as on HP-UX with the proprietary compilers:
* only with the HP's make (using -P) I was able to compile GMP /
Python / etc. with more than one thread, and
* only with the HP's C++ compiler (in C-compatible mode) I was able
to build GMP with more than two threads.
The only somewhat realistic way the compiler could cause parallel builds
failures is if it uses hardwired temp filenames. But I'd be extremely
surprised if that were the case.
Hard to say as these are proprietary compilers, so our results are from
a black box sort of testing.
However, we frequently got errors with both HP's compilers when building
in parallel (more frequent for GMP, less for Python). They look like
race conditions.
So we switched back to using GNU's make to get consistent results
(albeit with noticeably slower builds). More on this at
https://github.com/chevah/python-package/pull/107.
Thank you once more for GMP,
--
Mișu Moldovan - [email protected]
Pro:Atria Ltd - http://www.proatria.com
Tel: +44 (0) 1963 441311
The Old Exchange, South Cadbury, YEOVIL, BA22 7ET, UK
Registered in England - Company No: 4213930.
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