This reverts commit d26e5ed3.
We have to wait until our minimal required compiler is GCC 4.7
or newer.
Thanks to Carsten for the heads-up.

The signature changed in C++11 which we require now.
To get more details see the mailinglost in October 2012.

It should be std::endl.
Courtesy of GCC 5-svn, it refuses to compile these.

GCC warns about it.

While gcc supports them (as extension) runtime sized arrays
are not standard c++. They are not even contained in c++14
but postponed to a later TS.

Add "@relatesalso null_deleter", this includes the documentation for the
function with null_deleter but also leaves a standalone version.  Document
what is so special about the shared_ptr the function returns.  Mention the
#include needed to get the function.

"C", no matter what locale is currently set.

[parametertree][locale][fs1528] Check ParameterTree::get() with a locale using "," as the decimal seperator.

ParameterTrees are usually read from configuration files.  The format of the
configuration file should not depend on the locale.

For the commandline parser it would likewise be surprising if "progname -param
0.5" stopped working in a german locale.

Not long ago these kinds of errors would not even generate a diagnosis due to
FS#1527.  However, the locale of the program is "C" by default, so probably
not many poeple are actually affected by this problem.  It can happen however
that other libraries linked into the same program set the locale from the
environment.

"Makefile.in", "*.o", etc. need only be listed in the toplevel .gitignore, the
rules are applied recursively.

Test programs etc. should be listed as "/program" in their directory's
.gitignore, so they are not accidentially ignored in a lower level directory.

ParameterTree::get("key", def).

These overloads were using atoi() resp. atof(), effectively ignoring junk at
the end of values.  This led to the situation where a floating point value
"0.5" could be parsed as an int "0" without any diagnostic.

assert() works only in debug builds (without -DNDEBUG).  Instead, implement
our own check_assert().

I took the formula from

 http://en.wikipedia.org/wiki/Eigenvalue_algorithm  (retrieved lated August 2014).

Wikipedia claims to have taken it from

 Smith, Oliver K. (April 1961), Eigenvalues of a symmetric 3 × 3 matrix,
 Communications of the ACM 4 (4): 168, doi:10.1145/355578.366316

I did not check stability of efficiency of this, but no problems related to
either are mentioned in the literature.  The main reason I need the closed-form
expression is to be able to pipe it into an algorithmic differentiation system.

Rip out the complete test for eigenValuesNonSym and replace it by the Rosser matrix test from fieldmatrixtest.cc

The old test was complete nonsense: an implementation of some sort of strange
undocumented shape function set that happened to need eigenvalues for something.
Lots of undocumented code, and no checks at all whether the values obtained
by eigenValuesNonSym actually make sense.

Only, for the particular choice of parameters used, eigenValuesNonSym was never
called.  Yes, you read this correctly: these hundreds of lines of code didn't
actually test anything.

The new test is copied form fieldmatrixtest.cc and adapted for DynamicMatrix
types.  It computes eigenvalues of a given 8x8 matrix and compares with the known
results.  Unfortunately, the test matrix is only symmetric.  Tests with more
general matrices are left for another day.

Rather than assuming the caller has set it to the correct size already.
Setting the size in the method eigenValuesNonSym itself makes code
more robust.  Plus, the time needed for that should be negligible
compared to the actual eigenvalue computations.

It is not actually needed, because the code also works in other cases.
A comment next the assertion even explicitly stated that it is not needed!

We decided to have all stl like stuff in Dune::Std:: and not
in Std:: Besides our decision with the previous version tupleutility.hh
did not compile if a header refering to Dune::Std:: was included.

This uses perfect forwarding (following Herb Sutter) and
SFINAE (following Stephan T. Lavavej) to get a standard
comforming implementation also for array.

These classes are deprecated, and some of the tests cause
problems with ctest due to a destructor throwing an exception.
It seems easier to remove the tests directly, as the tested code
is deprecated anyway.

See FS1508. C++11 initializer lists should be used instead.

testdebugallocator_fail{1..5} are a very special sort of tests,
as in order to pass they are expected to fail with a signal like
SIGABRT or SIGSEGV. While autotools, dont distinguish much
about how a test failed, if it is supposed to fail, ctest
handles signals from the test and distinguishes this from
normal termination with nonzero exit code.

This commit introduces a signal handling in the test itself,
that causes the program to terminate "normally" with a nonzero exit
code instead of passing the signal to the fathering process
(ctest). The signal, which is expected to be received can be set
from CMakeLists.txt via a preprocessor variable.

This basically wraps the raw snprintf in order to provide
overflow-save printf functionality while hiding the details
like buffers handling, multiple calls to snprintf, ...

Note that snprintf is a c++11 feature that is, however,
present in gcc-4.4.

This very old gcc bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=10200 is fixed in clang but not in icc or gcc, see FS#1505.