QtAutoUic: Add INTERFACE_AUTOUIC_OPTIONS target property.

Transitively consume the property from linked dependents.

Implement configuration-specific support by following the pattern
set out for compile definitions and includes in cmQtAutoGenerators.

Implement support for origin-tracking with CMAKE_DEBUG_TARGET_PROPERTIES.

This is motivated by the needs of KDE, which provides a separate
translation system based on gettext instead of the Qt linguist
translation system. The Qt uic tool provides command line options
for configuring the method used to translate text, and to add an
include directive to the generated file to provide the method.

 http://thread.gmane.org/gmane.comp.kde.devel.frameworks/7930/focus=7992

Implement the interface to provide the uic options as a usage-requirement
on the KI18n target, as designed for KDE.

4 files changed, 21 insertions, 2 deletions

diff --git a/Help/manual/cmake-properties.7.rst b/Help/manual/cmake-properties.7.rst
index 2097062..d569e31 100644
--- a/Help/manual/cmake-properties.7.rst
+++ b/Help/manual/cmake-properties.7.rst
@@ -141,6 +141,7 @@ Properties on Targets
    /prop_tgt/INSTALL_NAME_DIR
    /prop_tgt/INSTALL_RPATH
    /prop_tgt/INSTALL_RPATH_USE_LINK_PATH
+   /prop_tgt/INTERFACE_AUTOUIC_OPTIONS
    /prop_tgt/INTERFACE_COMPILE_DEFINITIONS
    /prop_tgt/INTERFACE_COMPILE_OPTIONS
    /prop_tgt/INTERFACE_INCLUDE_DIRECTORIES
diff --git a/Help/prop_tgt/AUTOUIC_OPTIONS.rst b/Help/prop_tgt/AUTOUIC_OPTIONS.rst
index c6cf885..aeec38b 100644
--- a/Help/prop_tgt/AUTOUIC_OPTIONS.rst
+++ b/Help/prop_tgt/AUTOUIC_OPTIONS.rst
@@ -15,3 +15,7 @@ This property is initialized by the value of the variable
 
 The options set on the target may be overridden by :prop_sf:`AUTOUIC_OPTIONS` set
 on the .ui source file.
+
+This property may use "generator expressions" with the syntax "$<...>".
+See the :manual:`cmake-generator-expressions(7)` manual for available
+expressions.
diff --git a/Help/prop_tgt/INTERFACE_AUTOUIC_OPTIONS.rst b/Help/prop_tgt/INTERFACE_AUTOUIC_OPTIONS.rst
new file mode 100644
index 0000000..e97d293
--- /dev/null
+++ b/Help/prop_tgt/INTERFACE_AUTOUIC_OPTIONS.rst
@@ -0,0 +1,14 @@
+INTERFACE_AUTOUIC_OPTIONS
+-------------------------
+
+List of interface options to pass to uic.
+
+Targets may populate this property to publish the options
+required to use when invoking ``uic``.  Consuming targets can add entries to their
+own :prop_tgt:`AUTOUIC_OPTIONS` property such as
+``$<TARGET_PROPERTY:foo,INTERFACE_AUTOUIC_OPTIONS>`` to use the uic options
+specified in the interface of ``foo``. This is done automatically by
+the :command:`target_link_libraries` command.
+
+This property supports generator expressions.  See the
+:manual:`cmake-generator-expressions(7)` manual for available expressions.
diff --git a/Help/variable/CMAKE_DEBUG_TARGET_PROPERTIES.rst b/Help/variable/CMAKE_DEBUG_TARGET_PROPERTIES.rst
index 2ded823..6b17f6e 100644
--- a/Help/variable/CMAKE_DEBUG_TARGET_PROPERTIES.rst
+++ b/Help/variable/CMAKE_DEBUG_TARGET_PROPERTIES.rst
@@ -6,6 +6,6 @@ Enables tracing output for target properties.
 This variable can be populated with a list of properties to generate
 debug output for when evaluating target properties.  Currently it can
 only be used when evaluating the INCLUDE_DIRECTORIES,
-COMPILE_DEFINITIONS and COMPILE_OPTIONS target properties.  In that
-case, it outputs a backtrace for each entry in the target property.
+COMPILE_DEFINITIONS, COMPILE_OPTIONS and AUTOUIC_OPTIONS target properties.
+In that case, it outputs a backtrace for each entry in the target property.
 Default is unset.