Fix bugs in documentation relating to cling based build

Author: mcbarton

README.md

@@ -225,7 +225,7 @@ cd .\cling\
 git checkout tags/v1.0
 cd ..
 git clone --depth=1 -b cling-llvm13 https://github.com/root-project/llvm-project.git
-$env:ncpus = %NUMBER_OF_PROCESSORS%
+$env:ncpus = $([Environment]::ProcessorCount)
 $env:PWD_DIR= $PWD.Path
 $env:CLING_DIR="$env:PWD_DIR\cling"
 mkdir llvm-project\build
@@ -269,9 +269,22 @@ Regardless of whether you are building CppInterOP with Cling or Clang-REPL you w
 ```bash
 export CB_PYTHON_DIR="$PWD/cppyy-backend/python"
 export CPPINTEROP_DIR="$CB_PYTHON_DIR/cppyy_backend"
+```
+
+If building CppInterOp against clang-repl you will need to define the following
+
+```bash
 export CPLUS_INCLUDE_PATH="${CPLUS_INCLUDE_PATH}:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_DIR}/build/include:${LLVM_DIR}/build/tools/clang/include"
 ```
 
+and if building against cling you will need to define the following
+
+```bash
+export CLING_DIR="$(pwd)/cling"
+export CLING_BUILD_DIR="$(pwd)/cling/build"
+export CPLUS_INCLUDE_PATH="${CLING_DIR}/tools/cling/include:${CLING_BUILD_DIR}/include:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_BUILD_DIR}/include:${LLVM_BUILD_DIR}/tools/clang/include:$PWD/include"
+```
+
 If on MacOS you will also need the following environment variable defined
 
 ```bash
@@ -283,9 +296,22 @@ On Windows you define as follows (assumes you have defined $env:PWD_DIR= $PWD.Pa
 ```powershell
 $env:CB_PYTHON_DIR="$env:PWD_DIR\cppyy-backend\python"
 $env:CPPINTEROP_DIR="$env:CB_PYTHON_DIR\cppyy_backend"
+```
+
+If building against clang-repl you will have the following defined
+
+```powershell
 $env:CPLUS_INCLUDE_PATH="$env:CPLUS_INCLUDE_PATH;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_DIR\build\include;$env:LLVM_DIR\build\tools\clang\include"
 ```
 
+and if building against cling
+
+```powershell
+$env:CLING_DIR="$env:PWD_DIR\cling"
+$env:CLING_BUILD_DIR="$env:PWD_DIR\cling\build"
+$env:CPLUS_INCLUDE_PATH="$env:CLING_DIR\tools\cling\include;$env:CLING_BUILD_DIR\include;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_BUILD_DIR\include;$env:LLVM_BUILD_DIR\tools\clang\include;$env:PWD_DIR\include;"
+```
+
 #### Build CppInterOp
 
 Now CppInterOp can be installed. On Linux and MacOS execute

docs/DevelopersDocumentation.rst

@@ -164,7 +164,7 @@ Use the following build instructions to build on Windows
    git checkout tags/v1.0
    cd ..
    git clone --depth=1 -b cling-llvm13 https://github.com/root-project/llvm-project.git
-   $env:ncpus = %NUMBER_OF_PROCESSORS%
+   $env:ncpus = $([Environment]::ProcessorCount)
    $env:PWD_DIR= $PWD.Path
    $env:CLING_DIR="$env:PWD_DIR\cling"
    mkdir llvm-project\build
@@ -215,8 +215,21 @@ define as follows
 
    export CB_PYTHON_DIR="$PWD/cppyy-backend/python"
    export CPPINTEROP_DIR="$CB_PYTHON_DIR/cppyy_backend"
+
+If building CppInterOp against clang-repl you will need to define the following
+
+.. code:: bash
+
    export CPLUS_INCLUDE_PATH="${CPLUS_INCLUDE_PATH}:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_DIR}/build/include:${LLVM_DIR}/build/tools/clang/include"
 
+and if building against cling you will need to define the following
+
+.. code:: bash
+   
+   export CLING_DIR="$(pwd)/cling"
+   export CLING_BUILD_DIR="$(pwd)/cling/build"
+   export CPLUS_INCLUDE_PATH="${CLING_DIR}/tools/cling/include:${CLING_BUILD_DIR}/include:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_BUILD_DIR}/include:${LLVM_BUILD_DIR}/tools/clang/include:$PWD/include"
+
 If on MacOS you will also need the following environment variable defined
 
 .. code:: bash
@@ -230,8 +243,21 @@ $PWD.Path )
 
    $env:CB_PYTHON_DIR="$env:PWD_DIR\cppyy-backend\python"
    $env:CPPINTEROP_DIR="$env:CB_PYTHON_DIR\cppyy_backend"
+
+If building against clang-repl you will have the following defined
+
+.. code:: powershell
+
    $env:CPLUS_INCLUDE_PATH="$env:CPLUS_INCLUDE_PATH;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_DIR\build\include;$env:LLVM_DIR\build\tools\clang\include"
 
+and if building against cling
+
+.. code:: powershell
+
+   $env:CLING_DIR="$env:PWD_DIR\cling"
+   $env:CLING_BUILD_DIR="$env:PWD_DIR\cling\build"
+   $env:CPLUS_INCLUDE_PATH="$env:CLING_DIR\tools\cling\include;$env:CLING_BUILD_DIR\include;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_BUILD_DIR\include;$env:LLVM_BUILD_DIR\tools\clang\include;$env:PWD_DIR\include;"
+
 ******************
  Build CppInterOp
 ******************

docs/InstallationAndUsage.rst

@@ -164,7 +164,7 @@ Use the following build instructions to build on Windows
    git checkout tags/v1.0
    cd ..
    git clone --depth=1 -b cling-llvm13 https://github.com/root-project/llvm-project.git
-   $env:ncpus = %NUMBER_OF_PROCESSORS%
+   $env:ncpus = $([Environment]::ProcessorCount)
    $env:PWD_DIR= $PWD.Path
    $env:CLING_DIR="$env:PWD_DIR\cling"
    mkdir llvm-project\build
@@ -215,8 +215,21 @@ define as follows
 
    export CB_PYTHON_DIR="$PWD/cppyy-backend/python"
    export CPPINTEROP_DIR="$CB_PYTHON_DIR/cppyy_backend"
+
+If building CppInterOp against clang-repl you will need to define the following
+
+.. code:: bash
+
    export CPLUS_INCLUDE_PATH="${CPLUS_INCLUDE_PATH}:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_DIR}/build/include:${LLVM_DIR}/build/tools/clang/include"
 
+and if building against cling you will need to define the following
+
+.. code:: bash
+   
+   export CLING_DIR="$(pwd)/cling"
+   export CLING_BUILD_DIR="$(pwd)/cling/build"
+   export CPLUS_INCLUDE_PATH="${CLING_DIR}/tools/cling/include:${CLING_BUILD_DIR}/include:${LLVM_DIR}/llvm/include:${LLVM_DIR}/clang/include:${LLVM_BUILD_DIR}/include:${LLVM_BUILD_DIR}/tools/clang/include:$PWD/include"
+
 If on MacOS you will also need the following environment variable defined
 
 .. code:: bash
@@ -230,8 +243,23 @@ $PWD.Path )
 
    $env:CB_PYTHON_DIR="$env:PWD_DIR\cppyy-backend\python"
    $env:CPPINTEROP_DIR="$env:CB_PYTHON_DIR\cppyy_backend"
+
+
+If building against clang-repl you will have the following defined
+
+.. code:: powershell
+
    $env:CPLUS_INCLUDE_PATH="$env:CPLUS_INCLUDE_PATH;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_DIR\build\include;$env:LLVM_DIR\build\tools\clang\include"
 
+and if building against cling
+
+.. code:: powershell
+
+   $env:CLING_DIR="$env:PWD_DIR\cling"
+   $env:CLING_BUILD_DIR="$env:PWD_DIR\cling\build"
+   $env:CPLUS_INCLUDE_PATH="$env:CLING_DIR\tools\cling\include;$env:CLING_BUILD_DIR\include;$env:LLVM_DIR\llvm\include;$env:LLVM_DIR\clang\include;$env:LLVM_BUILD_DIR\include;$env:LLVM_BUILD_DIR\tools\clang\include;$env:PWD_DIR\include;"
+
+
 ******************
  Build CppInterOp
 ******************