This MEX solves nonlinear systems of equations using a trust region algorithm.
The problem is subdivided in smaller problems by doing a block
triangularisation of the Jacobian at the guess value, using the
Dulmage-Mendelsohn algorithm.

The interface of the MEX is simply:

  [x, info] = block_trust_region(f, guess_value);

Where f is either a function handle or a string designating a function.
f must take one argument (the evaluation point), and return either one or two
arguments (the residuals and, optionally, the Jacobian).

On success, info=0; on failure, info=1.

By the same token, remove unused support for Fortran 77.

- systematic recursive ordering of auxiliary equations (preprocessor#22)
- interface for init2shocks (#1650)

Fix olsgibbs residual output.

See merge request Enterprise/dynare!8

Closes #1359

Add residuals to olsgibbs function output.

See merge request Enterprise/dynare!7

Save conditional forecast output in oo_. Closes: Dynare/dynare#1672

Closes #1672

See merge request Dynare/dynare!1675

closes #1669

In updating the preprocessor, also update call to plot_icforecast

The changes in 8065e9d4 were not working as
intended, because AC_CHECK_PROG expect values and not actions. Hence
AC_MSG_ERROR was not properly executed.

By the way, simplify some test conditions using && instead of if/then/fi
blocks.

introduce dynare options `exclude_eqs` and `include_eqs`

See merge request Enterprise/dynare!6

- new include_eqs and exclude_eqs command-line options
- new “forecast” option to “shock_decomposition”
- remove the “linear” option of “stoch_simul”
- forbid exogenous and exogenous deterministic variables in STEADY_STATE
  operator (#825)

The logic of the dynSparseMatrix::Sparse_substract_SA_SB() routine was
incorrect.

In some cases, it would read past the last nonzero elements of the A matrix,
and consequently write past the number of allocated nonzero elements of the C
matrix.

This would lead to crashes and, probably, to wrong results under certain
circumstances.

Closes: #1652

Nonlinear solver: tolerance for first Newton iteration is now smaller than for subsequent ones

See merge request Dynare/dynare!1674

smaller than for subsequent ones. Closes: #1668

Remove globals from user-defined steadystate file

See merge request !1673

M_ and options_ are now passed as an input; params is an output as in the _steadystate2.m files

Allows for easier maintenance

It’s not clear that such utilities are useful (people should rather update
their MATLAB). It’s also a lot of work, and it’s probably better to focus on
documenting the incompatibilities.

Closes: #915

It is not possible to use --disable-matlab and --disable-octave, because
otherwise `make dist` does not properly recurse.

By the way, factorize the computation of the path and version of the default
MATLAB installation.

In particular, if either MATLAB or Octave is missing, one needs to pass either
--disable-matlab or --disable-octave.

Moreover, several new configure flags have been introduced for disabling some
components:
--disable-doc
--disable-dynare++
--disable-mex-dynare++
--disable-mex-ms-sbvar
--disable-mex-kalman-steady-state

after check, oo_.dr isn't empty but oo_.dr.ghx + friends don't exist

See merge request Dynare/dynare!1672