Enable OpenMP support on Linux.

[beltoforion]

Enable OpenMP support on Linux.

[GoogleCodeExporter]

Sorry for not following up in time. This looks like it would work. Most files 
of the build system are auto generated and i can't use patches for those files. 
I'll check it before the next service release.

Original comment by [email protected] on 27 Jan 2014 at 8:33

[GoogleCodeExporter]

Ok, thanks.

Original comment by [email protected] on 27 Jan 2014 at 9:55

[giraldeau]

I enabled the OpenMP and added the example1 in a test, but the program gets stuck here:

(gdb) bt
#0  0x00007ffff7b75bb6 in mu::ParserBase::ParseCmdCodeBulk(int, int) const () from /home/francisg/muparser/temp/libmuparser.so.2
#1  0x00007ffff7b79762 in mu::ParserBase::Eval(double*, int) [clone ._omp_fn.0] () from /home/francisg/muparser/temp/libmuparser.so.2
#2  0x00007ffff6ca7cbf in GOMP_parallel () from /usr/lib/x86_64-linux-gnu/libgomp.so.1
#3  0x00007ffff7b795ab in mu::ParserBase::Eval(double*, int) () from /home/francisg/muparser/temp/libmuparser.so.2
#4  0x00007ffff7baf41b in mu::Test::ParserTester::EqnTestBulk(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, double*, bool) ()
   from /home/francisg/muparser/temp/libmuparser.so.2
#5  0x00007ffff7b94f77 in mu::Test::ParserTester::TestBulkMode() () from /home/francisg/muparser/temp/libmuparser.so.2
#6  0x00007ffff7baaa86 in mu::Test::ParserTester::Run() () from /home/francisg/muparser/temp/libmuparser.so.2
#7  0x000000000040bac9 in SelfTest() ()
#8  0x000000000040dbfe in main ()

[beltoforion]

Can confirm that there seems to be an issue but not yet what kind of issue. Will investigate the issue.

[beltoforion]

The reason is that the bulk test code is using a sample size of 4. Nowadays most cpu's have more cors and due to an error in the chuck size computation for openmp. The parser is assigning a chunk size of 0.

A fix will be commited shortly.

[beltoforion]

The issue is fixed; OpenMP is now the default setting for compiling muparser