docs: add new -pm compiler option to OW documentation

Author: jmalak

docs/doc/cg/cpoptlst.gml

@@ -642,6 +642,10 @@
 ~b~b~b~b~b~b
 .br
 .*
+:hotlink refid='SWpm'.
+~b~b~b~b~b~b
+.br
+.*
 :CMT. .note pe
 :hotlink refid='SWp'.
 ~b~b~b~b~b~b

docs/doc/cg/cpopts.gml

@@ -304,6 +304,11 @@ set preprocessor output file name
 preprocessor ignores #line directives
 :optref refid='SWpil'.
 .do end
+.if &e'&$SWpm ne 0 .do begin
+.note pm
+list of current predefined macros and their values
+:optref refid='SWpm'.
+.do end
 .if &e'&$SWp ne 0 .do begin
 .note p{e,l,c,w=<num>}
 preprocess file
@@ -2354,6 +2359,11 @@ messages, __FILE__ and __LINE__ symbols, etc. The "pil" option causes the
 preprocessor to ignore #line directives and refer to actual file names and
 line numbers.
 .do end
+.if &e'&$SWpm ne 0 .do begin
+:OPT refid='SWpm' name='pm'.
+.ix 'options' 'pm'
+It lists current predefined macros and their values.
+.do end
 .*
 .if &e'&$SWp ne 0 .do begin
 :OPT refid='SWp' name='p'.{e,l,c,w=<num>}

docs/doc/cg/cpoptsum.gml

@@ -676,6 +676,10 @@ control optimization
 preprocessor ignores #line directives
 :optref refid='SWpil'.
 .*
+.note pm
+list of current predefined macros and their values
+:optref refid='SWpm'.
+.*
 .note p{e,l,c,w=<num>}
 :CMT. .ix 'options' 'pe'
 :CMT. .ix 'options' 'pl'