| PCH_WARNINGS |
| ------------ |
| |
| .. versionadded:: 4.6 |
| |
| Enable compiler warnings for the headers listed in :prop_tgt:`PRECOMPILE_HEADERS`. |
| |
| By default CMake marks the generated precompiled header file as a system |
| header, which suppresses the diagnostics of every header it includes. This |
| means that enabling precompiled headers silently hides warnings that the same |
| build would produce without them. |
| |
| Set this property to true to omit the system header marker so that the headers |
| collected into the precompiled header are diagnosed as they would be in a |
| build without precompiled headers. The diagnostics are reported once, while |
| compiling the precompiled header itself, rather than once per source file. |
| |
| This property is initialized by the value of the :variable:`CMAKE_PCH_WARNINGS` |
| variable when the target is created. |
| |
| The :generator:`Xcode` generator never adds the system header marker, so this |
| property has no effect there. |
| |
| Targets that reuse a precompiled header through |
| :prop_tgt:`PRECOMPILE_HEADERS_REUSE_FROM` do not generate a precompiled header |
| of their own, so this property has no effect on them either. Set it on the |
| target named by :prop_tgt:`PRECOMPILE_HEADERS_REUSE_FROM` instead. |
