Help: Mark up the buildsystem commands documentation

Cross-link to the cmake-buildsystem manual.

1 files changed, 16 insertions, 8 deletions

diff --git a/Help/command/add_definitions.rst b/Help/command/add_definitions.rst
index 4c72752..a9a6bf5 100644
--- a/Help/command/add_definitions.rst
+++ b/Help/command/add_definitions.rst
@@ -7,13 +7,21 @@ Adds -D define flags to the compilation of source files.
 
   add_definitions(-DFOO -DBAR ...)
 
-Adds flags to the compiler command line for sources in the current
+Adds definitions to the compiler command line for sources in the current
 directory and below.  This command can be used to add any flags, but
-it was originally intended to add preprocessor definitions.  Flags
+it is intended to add preprocessor definitions.  Flags
 beginning in -D or /D that look like preprocessor definitions are
-automatically added to the COMPILE_DEFINITIONS property for the
-current directory.  Definitions with non-trivial values may be left in
-the set of flags instead of being converted for reasons of backwards
-compatibility.  See documentation of the directory, target, and source
-file COMPILE_DEFINITIONS properties for details on adding preprocessor
-definitions to specific scopes and configurations.
+automatically added to the :prop_dir:`COMPILE_DEFINITIONS` directory
+property for the current directory.  Definitions with non-trivial values
+may be left in the set of flags instead of being converted for reasons of
+backwards compatibility.  See documentation of the
+:prop_dir:`directory <COMPILE_DEFINITIONS>`,
+:prop_tgt:`target <COMPILE_DEFINITIONS>`,
+:prop_sf:`source file <COMPILE_DEFINITIONS>` ``COMPILE_DEFINITIONS``
+properties for details on adding preprocessor definitions to specific
+scopes and configurations.
+
+Arguments to ``add_definitions`` may use "generator expressions" with
+the syntax "$<...>".  See the :manual:`cmake-generator-expressions(7)`
+manual for available expressions.  See the :manual:`cmake-buildsystem(7)`
+manual for more on defining buildsystem properties.