Help: add some initial documentation for Swift support

Help/envvar/SWIFTC.rst

@@ -0,0 +1,11 @@
+SWIFTC
+------
+
+.. include:: ENV_VAR.txt
+
+Preferred executable for compiling ``Swift`` language files. Will only be used by
+CMake on the first configuration to determine ``Swift`` compiler, after which the
+value for ``SWIFTC`` is stored in the cache as
+:variable:`CMAKE_Swift_COMPILER <CMAKE_<LANG>_COMPILER>`. For any configuration run
+(including the first), the environment variable will be ignored if the
+:variable:`CMAKE_Swift_COMPILER <CMAKE_<LANG>_COMPILER>` variable is defined.

Help/manual/cmake-env-variables.7.rst

@@ -52,6 +52,7 @@ Environment Variables for Languages
    /envvar/FFLAGS
    /envvar/RC
    /envvar/RCFLAGS
+   /envvar/SWIFTC
 
 Environment Variables for CTest
 ===============================

Help/manual/cmake-properties.7.rst

@@ -315,6 +315,9 @@ Properties on Targets
    /prop_tgt/STATIC_LIBRARY_FLAGS
    /prop_tgt/STATIC_LIBRARY_OPTIONS
    /prop_tgt/SUFFIX
+   /prop_tgt/Swift_DEPENDENCIES_FILE
+   /prop_tgt/Swift_MODULE_DIRECTORY
+   /prop_tgt/Swift_MODULE_NAME
    /prop_tgt/TYPE
    /prop_tgt/VERSION
    /prop_tgt/VISIBILITY_INLINES_HIDDEN
@@ -439,6 +442,8 @@ Properties on Source Files
    /prop_sf/SKIP_AUTOMOC
    /prop_sf/SKIP_AUTORCC
    /prop_sf/SKIP_AUTOUIC
+   /prop_sf/Swift_DEPENDENCIES_FILE
+   /prop_sf/Swift_DIAGNOSTICS_FILE
    /prop_sf/SYMBOLIC
    /prop_sf/VS_COPY_TO_OUT_DIR
    /prop_sf/VS_CSHARP_tagname

Help/manual/cmake-variables.7.rst

@@ -97,6 +97,7 @@ Variables that Provide Information
    /variable/CMAKE_SOURCE_DIR
    /variable/CMAKE_STATIC_LIBRARY_PREFIX
    /variable/CMAKE_STATIC_LIBRARY_SUFFIX
+   /variable/CMAKE_Swift_MODULE_DIRECTORY
    /variable/CMAKE_TOOLCHAIN_FILE
    /variable/CMAKE_TWEAK_VERSION
    /variable/CMAKE_VERBOSE_MAKEFILE

Help/prop_sf/Swift_DEPENDENCIES_FILE.rst

@@ -0,0 +1,5 @@
+Swift_DEPENDENCIES_FILE
+-----------------------
+
+This property sets the path for the Swift dependency file (swiftdeps) for the
+source.

Help/prop_sf/Swift_DIAGNOSTICS_FILE.rst

@@ -0,0 +1,4 @@
+Swift_DIAGNOSTICS_FILE
+----------------------
+
+This property controls where the Swift diagnostics are serialized.

Help/prop_tgt/Swift_DEPENDENCIES_FILE.rst

@@ -0,0 +1,5 @@
+Swift_DEPENDENCIES_FILE
+-----------------------
+
+This property sets the path for the Swift dependency file (swiftdep) for the
+target.

Help/prop_tgt/Swift_MODULE_DIRECTORY.rst

@@ -0,0 +1,10 @@
+Swift_MODULE_DIRECTORY
+----------------------
+
+Specify output directory for Swift modules provided by the target.
+
+If the target contains Swift source files, this specifies the directory in which
+the modules will be placed.  When this property is not set, the modules will be
+placed in the build directory corresponding to the target's source directory.
+If the variable :variable:`CMAKE_Swift_MODULE_DIRECTORY` is set when a target is
+created its value is used to initialise this property.

Help/prop_tgt/Swift_MODULE_NAME.rst

@@ -0,0 +1,5 @@
+Swift_MODULE_NAME
+-----------------
+
+This property specifies the name of the Swift module.  It is defaulted to the
+name of the target.

Help/release/dev/swift-support.rst

@@ -0,0 +1,23 @@
+Swift Language Support
+----------------------
+
+* Preliminary support for the Swift language with the :generator:`Ninja`
+  generator was added.  Use the :envvar:`SWIFTC` environment variable to
+  specify a compiler.
+
+* Support to emit an output file map was added to enable Swift compilation.
+
+* A target property :prop_tgt:`Swift_DEPENDENCIES_FILE` was added to targets to
+  indicate where to save the target swift dependencies file.  If one is not
+  specified, it will default to `<TARGET>.swiftdeps`.
+
+* A target property :prop_tgt:`Swift_MODULE_NAME` was added to targets to
+  indicate the Swift module name.  If it is not specified, it will default to
+  the name of the target.
+
+* A source property :prop_sf:`Swift_DEPENDENCIES_FILE` was added to sources to
+  indicate where to save the target swift dependencies file.  If one is not
+  specified, it will default to `<OBJECT>.swiftdeps`.
+
+* A source property :prop_sf:`Swift_DIAGNOSTICS_FILE` was added to sources to
+  indicate where to write the serialised Swift diagnostics.

Help/variable/CMAKE_Swift_MODULE_DIRECTORY.rst

@@ -0,0 +1,8 @@
+CMAKE_Swift_MODULE_DIRECTORY
+----------------------------
+
+Swift module output directory.
+
+This variable is used to initialise the :prop_tgt:`Swift_MODULE_DIRECTORY`
+property on all the targets.  See the target property for additional
+information.