This is done by taking the check of fUniqueID and the assignment to fBuits
into a separate function and by including this function in the header
*but* marking it as "noinline" to prevent its inlining and preserve a
way to suppress the valgrind warning.

Introducing the macro R__NEVER_INLINE which expands to

   inline __attribute__((noinline))

The performance degradation is less than 10% for a case doing
only creation and destruction of TObjects.

this will allow to maintain a standalone version of VMC in parallel, which can be then tagged more frequently according to the needs of the VMC project

This reverts commit 83e5d9f45c76914118501652e0c53ff56793fefe.

This is required, for example, when building roottest externally
to find and run hsimple.C with root to generate hsimple.root.

ROOT-9956 #close

Tests are only meant to be run during the build,
not to be installed as part of ROOT.

Now default location for JSROOT is <prefix>/js
For Openui5 files is <prefix>/ui5

Can cause unnecessary extra linking to system libraries. We should
add linking libraries directly to each target that needs it.

This was introduced by 2744a802520eb0f45a832ed2c9d351c30b73cee9.
Currently, 'cmake -E env' is used for setting environment variables.

Inside build/unix/compiledata.sh, 'BXX' is set to the
basename of 'CXX' and used instead, so this code is not
needed in any case.

Fixes: ROOT-9883

This is necessary to ensure that the header RConfigure.h
will contain correct information if CMAKE_CXX_STANDARD is
changed after the initial configuration.

Related issues: ROOT-9492, ROOT-9841

Fixes: ROOT-9695, ROOT-9805

Export in ROOTConfig.cmake the list of all options, too.

This patch is a prerequisite to fix ROOT-9405.

unless we are not on osx and gcc the gcc major is 4.

The test should reuse the prebuilt modules in the module cache. However,
due to a mismatch between the module-related flags exported by FindROOT.
There is a mismatch between the -D passed by cmake.

This patch make sure that the build arguments match more closely the build
setup of ROOT. Thus we can reuse the already built module files.

The CMake build system is broken with genvector=OFF (does not really
disable genvector, and tests fail if that is fixed). Therefore, it
was decided that it's better to just make this always ON and remove
the option for disabling it altogether.