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Change Logs

* Mon Dec 11 2017
- update to 4.64:
  * The dual simplex solver routine was changed to perform more
    aggressive perturbation to prevent dual degeneracy and avoid
    stalling even if the current dual basic solution is strongly
    feasible (mainly if the objective is zero)
  * The exact simplex solver routine was changed to perform
    terminal output according to the verbosity level (specified by
    the control parameter smcp.msg_lev)
  * A minor bug (related to MS Windows version) was fixed
  * An example model (Graceful Tree Labeling Problem) in MathProg
    was added
  * Three example models (Power plant LP scheduler, Neumann CA
    grid emulator generator) in MathProg and one in Cplex LP format
    were added
* Mon Jul 31 2017
- Update to version 4.63:
  * A "smart" LP perturbation was implemented in the primal and
    dual simplex solvers.
  * The long-step technique was implemented for phase I of the
    primal simplex solver.
  * An internal objective scaling was included in both primal and
    ual simplex solvers.
  * The Posix version of glp_time (glpk/src/env/time.c) was changed
    to resolve time_t issue on msys2.
  * Three new example models in MathProg were added.
  * Changes for version 4.62:
  * The bound perturbation technique was included in the primal
    simplex solver to improve numerical stability and avoid
  * A range bug was fixed in the MPS reading routine.
  * Changes were made to provide 64-bit portability of the Minisat
  * Calls to non-thread-safe functions gmtime, strerror, and strtok
    were replaced by calls to corresponding thread-safe equivalents
* Mon Jan 23 2017
- Update to version 4.61:
  * An option was added to build a re-entrant version of the
    package suitable for running in a multi-threaded environment.
  * A re-entrant version of the package allows running multiple
    independent instances of glpk in different threads of a
    multi-threaded application.
- Use savannah as source for gpg keyring
* Fri Apr 01 2016
- Update to 4.60
  * src/glpk.h Declarations of all non-documented API routines were
    hidden by #ifdef GLP_UNDOC / #endif.
  * src/simplex/spydual.c An experimental feature (objective
    coefficient perturbation) to improve numerical stabilty and
    avoid cycling was included in the dual simplex solver.
- Enable gmp support
* Sun Mar 13 2016
- Update to 4.59
  * Some bugs were fixed and some improvements were made in the
    MIP solver.
  * The data file format used by API routines glp_read_graph and
    glp_write_graph was changed. For more details please see the
    document "GLPK: Graph and Network Routines" included in the
  * Translation of the document "Modeling Language GNU MathProg"
    to Brazilian Portuguese (pt-BR) was included (in LaTeX and pdf
* Fri Feb 19 2016
- Update to 4.58
  * The solution file format used by API routines glp_read_sol,
    glp_write_sol, glp_read_ipt, glp_write_ipt, glp_read_mip, and
    glp_write_mip was changed. For more details please see the GLPK
    reference manual included in the distribution.
  * The tan function (trigonometric tangent) was added to GNU
    MathProg modeling language.
  * A new version of the document "Modeling Language GNU MathProg"
    in Spanish was included (in LaTeX and pdf formats).
  * A check to determine if libtool needs '-no-undefined' flag to
    build shared libraries on some platforms was added.
  * A script to regenerate the configure script and the Makefiles
    was added.
* Sun Nov 08 2015
- Update to 4.57
  * A new, more efficient implementation of the dual simplex method
  was included in the package. This new implementation replaces
  the old one, which was removed.
  * Option sr_heur was added to struct glp_iocp to enable/disable
  the simple rounding heuristic used by the MIP solver. Thanks to
  Chris Matrakidis <> for suggestion.
  * New API routine glp_at_error was added and documented. Thanks
  to Jeroen Demeyer <> for suggestion.
  * Some minor typos were corrected in the GLPK documentation.
  Thanks to Anton Voropaev <> for typo
  * An example application program TSPSOL was added. It uses the
  GLPK MIP optimizer to solve the Symmetric Traveling Salesman
  Problem and illustrates "lazy" constraints generation. For more
  details please see glpk/examples/tsp/README.
* Fri Oct 02 2015
- Update to 4.56
  * A new, more efficient and more robust implementation of the
    primal simplex method was included in the package. This new
    implementation replaces the old one, which was removed.
  * A bug was fixed in a basis factorization routine. (The bug
    appeared if the basis matrix was structurally singular having
    duplicate row and/or column singletons.) Thanks to Martin Jacob
  * Scripts to build GLPK with Microsoft Visual Studio 2015 were
    added. Thanks to Xypron <> for contribution
    and testing.
- Cleanup spec file with spec-clener
* Wed Nov 12 2014
- Update to version 4.55
  * Bugfixes, documentation update. See NEWS file for details.
* Mon Mar 31 2014
- updated to 4.54
  * Block-triangular LU-factorization was implemented to be used
    on computing an initial factorization of the basis matrix.
  * A new version of the Schur-complement-based factorization
    module was included in the package. Now it can be used along
    with plain as well as with block-triangular LU-factorization.
  * The API routine glp_read_mps was changed to remove free rows.
  * etc. see NEWS for details
* Tue Dec 10 2013
- enable tests
* Wed Aug 07 2013
- Update to new upstream release 4.52.1
  * Version linkage information in the shared library was incorrect
- Set RPM groups according to common practice
- Do optional signature verification
* Thu Jul 25 2013
- use -fno-strict-aliasing to avoid warnings in minisat.c
- don't use dvipdf, docs are in pdf in 4.52
* Thu Jul 25 2013
- updated to 4.52 (see NEWA for details):
  * Some bugs were fixed. Thanks to
    Giorgio Sartor <>,
    Xypron <>,
    David T. Price <>
  * The clique cut generator was essentially reimplemented, and now
    it is able to process very large and/or dense conflict graphs.
  * Singleton and dense phases were implemented on computing
    LU-factorization with Gaussian elimination.
  * A new version of LU-factorization routines were added.
  * The new API routine glp_mincost_relax4, which is a driver to
    relaxation method of Bertsekas and Tseng (RELAX-IV), was added
    to the package.
  * All old API routines whose names begin with 'lpx_'
    were removed from API level and NO MORE AVAILABLE.
* Wed Mar 27 2013
- updated to 4.48:
  * This is a maintainer release.
  * Some minor changes in API (glpk.h) were made. For details
    please see ChangeLog.
  * Some bugs/typos were fixed. Thanks to
    Raniere Gaia Costa da Silva,
    Heinrich Schuchardt <>, and
    Robbie Morrison <> for reports.
* Thu Dec 06 2012
- Remove redundant tags/sections from specfile
- Parallel build with %_smp_mflags
- Avoid manual library dependencies; make doc subpackage noarch
* Mon Oct 31 2011
- updated to 4.47 (see NEWS)
* Tue May 24 2011
- updated to 4.45 (see NEWS)
* Thu Aug 19 2010
- updated to 4.44 (see NEWS)
* Mon Mar 15 2010
- updated to 4.43 (see NEWS)