ampl/mp 2.0.0 on GitHub

General

The NL reader API is now stable
AMPL Solver Library version 20150318: changelog
New C API for a subset of ASL functions contributed by Dominique Orban (#36)
Improved type safety of expression API (#35)
Added AMPL_LIBRARY_DIR CMake variable which specifies a directory to install AMPL function libraries relative to ${CMAKE_INSTALL_PREFIX} (#32)
.mex files are now installed in the same directory as shared libraries (#27, #32)
Fixed detection of floating-point arithmetic on non-x86 architectures (#25)
Changed OS X deployment target to 10.7 for compatibility with older systems
Fixed issues with the documentation (#31, #39, #41, #42, #43, #44)
Migrated the documentation from ReadTheDocs to GitHub Pages for better stability and performance

LocalSolver

Updated to version 5.0
The normal verbosity is now mapped to LocalSolver verbosity=1 and terse to custom output
Added support for piecewise-linear terms:
```
var x;
minimize o: <<0; -1, 1>> x;
option pl_linearize 0;
option solver localsolver;
solve;
```
The new option pl_bigm controls the artificial bound used for unbounded variables in piecewise-linear terms.

Objective bound can now be specified with the bound suffix:

suffix bound;
minimize o: sum{i in 1..NumOrders} WastedSteel[i] suffix bound 0;

Gecode

COIN-OR Solvers

Open-source solver binaries are available for download from the AMPL Open-Source Downloads page.