Autogen: Add moc path prefix generation (AUTOMOC_PATH_PREFIX)

The new `AUTOMOC_PATH_PREFIX` boolean target property enables automatic
generation of the path prefix `-p` option for `moc`.
`AUTOMOC_PATH_PREFIX` is initialized from the variable
`CMAKE_AUTOMOC_PATH_PREFIX`, which is ON by default.

When `AUTOMOC_PATH_PREFIX` is enabled, CMake tests if a `moc`ed header file is
in one of the include directories.  If so, then the `-p` option, with the
relative path of the header parent directory to the respective include
directory, is added to the `moc` command.  If the header file is not in an
include directory, the `-p` option is omitted.

Closes: #18815 "AUTOMOC: generated files include full relative path,
                breaking certain reproducible builds"

1 files changed, 4 insertions, 3 deletions

diff --git a/Source/cmQtAutoMocUic.h b/Source/cmQtAutoMocUic.h
index 71cd5f5..43123f2 100644
--- a/Source/cmQtAutoMocUic.h
+++ b/Source/cmQtAutoMocUic.h
@@ -212,16 +212,17 @@ public:
     bool Enabled = false;
     bool SettingsChanged = false;
     bool RelaxedMode = false;
+    bool PathPrefix = false;
     cmFileTime ExecutableTime;
     std::string Executable;
     std::string CompFileAbs;
     std::string PredefsFileAbs;
     std::unordered_set<std::string> SkipList;
     std::vector<std::string> IncludePaths;
-    std::vector<std::string> Includes;
     std::vector<std::string> Definitions;
-    std::vector<std::string> Options;
-    std::vector<std::string> AllOptions;
+    std::vector<std::string> OptionsIncludes;
+    std::vector<std::string> OptionsDefinitions;
+    std::vector<std::string> OptionsExtra;
     std::vector<std::string> PredefsCmd;
     std::vector<KeyExpT> DependFilters;
     std::vector<KeyExpT> MacroFilters;