Many headers contains redundant header guards around #include directives:

    #ifndef ROOT_TTree
    #include "TTree.h"
    #endif

This patch removes the #ifndef's around these includes as they
don't serve any pratical purpose anymore and are no longer part
of the current ROOT coding convention.

This patch also fixes the 153 typos that are contained in the
symbols of the #ifndef directives.

Signed-off-by: Vassil Vassilev <vvasilev@cern.ch>

Make cannot deal with 'export *', they have to be escaped and fixed later on.

This is the recommended way of using the modules feature and should pave our way
of enabling -fmodules-local-submodules-visibility mode.

Our two build systems can generate almost entirely a modulemap file laying out
one module per library. Due to some non-modular implementation in ROOT's core we
still need to treat some header files specially.

This patch appends modular header files to the modulemap while skipping the
predefined ones. Configure-make relates all headers that are installed in
$ROOTSYS/include to their library whereas relates only headers which are part of
library's dictionary.

See https://root.cern.ch/phpBB3/viewtopic.php?f=3&t=20835

Support for gcc 5.1. Define _GLIBCXX_USE_CXX11_ABI=0 for files using the Oracle occi binary library.

as it spoils cc7 compatibility.
Clean useless CINT include guards.

and an actual bug (a tautology in an if condition) in TH3

Fix Jira issue #ROOT-6511 TSQLiteStatement: Missing / wrong check for column index, failing IsNull(), as reported by Oliver Freyermuth:
Finally, my colleagues managed to uncover a small issue in my TSQLiteStatement implementation:
"IsNull()" checked the column-count in the wrong way (it used the number of bound columns which is only valid in prepared inserts).
I have done the following changes to TSQLiteStatement in the attached patch:
1. In fNumPars, I now store either the "bind" columns for a prepared statement with bound parameters, or the number of returned columns for a simple select without binding. This also simplifies error handling and TSQLiteStatement::GetNumFields() now just returns the variable which is correct in both working modes.
2. All Get'ters now check the column-number consistently, as the SQLite-documentation states that "get"ting an invalid column number returns undefined results. Note that for bound parameters, SQLite behaves differently and does the error handling itself (which I already check in TSQLiteStatement).

rootcling will write out ROOT files; that does not work for libCore and RIO
which instead use rootcling_tmp.
All other libraries use rootcling -rootbuild.
Rename ROOTCLINGTMP to ROOTCLINGSTAGE1; rootcling -rootbuild is ROOTCLINGSTAGE2.

now the library names in the rootmaps are sane.
In addition, the creation of the tmva and genvector dicts was
simplified.

By Oliver Freyermuth.

Fix by Denis Bertini.

mechanism which does not involve rlibmap anymore but
rootcling instead.
Basically all the calls to the macro calling rlibmap have been
removed.

Signed-off-by: Danilo Piparo <danilo.piparo@cern.ch>
Signed-off-by: Fons Rademakers <Fons.Rademakers@cern.ch>

which happens through rootcling and not anymore through rlibmap.

Signed-off-by: Danilo Piparo <danilo.piparo@cern.ch>
Signed-off-by: Fons Rademakers <Fons.Rademakers@cern.ch>

including files not supported on iOS.

By Oliver Freyemuth.