Unfortunately, from insepcting GLPK source code it seems that whether to use GNU MP or GLPK bignum is decided at compile time. So it appears that the Windows binaries which are automatically downloaded by the Julia package are just not compiled with GNU MP. As far as I can tell, the options are 1) compile from source in Windows and put the resulting shared library under GLPK/deps/usr/lib 2) find alternative binaries 3) ask the guy which provides the Windows binaries (http://www.xypron.de)
On Tuesday, April 8, 2014 12:14:21 AM UTC+2, Stéphane Laurent wrote: > > Hello, > > When I use the *exact* function of the GLPK > package<http://docs.julialang.org/en/release-0.1/stdlib/glpk/>, > I get something like that : > > > > > > > > *julia> GLPK.exact(lp) glp_exact: 6 rows, 9 columns, 18 non-zeros GLPK > bignum module is being used (Consider installing GNU MP to attain a much > better performance.) * 6: objval = 0.107142857142857 (1) * 6: objval = > 0.107142857142857 (1) OPTIMAL SOLUTION FOUND 0* > > > GNU MP <https://gmplib.org/> should be installed on my Windows machine > because I use the gmp package<http://cran.r-project.org/web/packages/gmp/>in > R. What should I do in order that GLPK uses this library in Julia ? >
