Document --version option in cct and gie

docs/source/apps/cct.rst

@@ -49,6 +49,10 @@ The following control parameters can  appear  in any order:
     Write non-essential, but potentially useful, information to stderr.
     Repeat for additional information (``-vv``, ``-vvv``, etc.)
 
+.. option:: --version
+
+    Print version number.
+
 The *+args* arguments are associated with coordinate operation parameters.
 Usage varies with operation.
 

docs/source/apps/gie.rst

@@ -47,6 +47,10 @@ already employed for compiling the library.
 
     List the PROJ internal system error codes
 
+.. option:: --version
+
+    Print version number
+
 Tests for :program:`gie` are defined in simple text files. Usually having the
 extension ``.gie``. Test for :program:`gie` are written in the purpose-build command language for gie.
 The basic functionality of the gie command language is implemented through just

src/cct.c

@@ -117,6 +117,7 @@ static const char usage[] = {
     "    --verbose         Alias for -v\n"
     "    --inverse         Alias for -I\n"
     "    --help            Alias for -h\n"
+    "    --version         Print version number\n"
     "--------------------------------------------------------------------------------\n"
     "Operator Specs:\n"
     "--------------------------------------------------------------------------------\n"

src/gie.c

@@ -221,6 +221,7 @@ static const char usage[] = {
     "    --verbose         Alias for -v\n"
     "    --help            Alias for -h\n"
     "    --list            Alias for -l\n"
+    "    --version         Print version number\n"
     "--------------------------------------------------------------------------------\n"
     "Examples:\n"
     "--------------------------------------------------------------------------------\n"