Merge pull request #1266 from junghans/cmake_doc

doc: add CMAKE_VERBOSE_MAKEFILE and CXX_COMPILER_LAUNCHER

cmake/README.md

@@ -24,7 +24,7 @@ tasks, act as a reference and provide examples of typical use cases.
       * [Build directory vs. Source Directory](#build-directory-vs-source-directory)
    * [Defining and using presets](#defining-and-using-presets)
    * [Reference](#reference)
-      * [Common CMAKE Configuration Options](#common-cmake-configuration-options)
+      * [Common CMake Configuration Options](#common-cmake-configuration-options)
       * [LAMMPS Configuration Options](#lammps-configuration-options)
       * [Parallelization and Accelerator Packages](#parallelization-and-accelerator-packages)
       * [Default Packages](#default-packages)
@@ -179,7 +179,7 @@ cmake -C ../cmake/presets/std_nolib.cmake -D PKG_GPU=on ../cmake
 
 # Reference
 
-## Common CMAKE Configuration Options
+## Common CMake Configuration Options
 
 
 <table>
@@ -208,6 +208,16 @@ cmake -C ../cmake/presets/std_nolib.cmake -D PKG_GPU=on ../cmake
   </dl>
   </td>
 </tr>
+<tr>
+  <td><code><CMAKE_VERBOSE_MAKEFILE/code></td>
+  <td>Enable verbose output from Makefile builds (useful for debugging), the same can be achived by adding `VERBOSE=1` to the `make` call.</td>
+  <td>
+  <dl>
+    <dt><code>off</code> (default)</dt>
+    <dt><code>on</code></dt>
+  </dl>
+  </td>
+</tr>
 </tbody>
 </table>
 
@@ -1729,6 +1739,13 @@ cache by setting the `CMAKE_C_COMPILER`, `CMAKE_CXX_COMPILER`,
   value of `FC` environment variable at first `cmake` run
   </td>
 </tr>
+<tr>
+  <td><code>CXX_COMPILER_LAUNCHER</code></td>
+  <td>CMake will run this tool and pass the compiler and its arguments to the tool. Some example tools are distcc and ccache.</td>
+  <td>
+  (empty)
+  </td>
+</tr>
 </tbody>
 </table>