* windres.c (usage): Add new --preprocessor-arg option.

(option_values): Add new OPTION_PREPROCESSOR_ARG enumerator.
	(option long_options): Add preprocessor-arg option.
	(main): Handle it.
	* doc/binutils.texi: Add documentation for --preprocessor-arg
	option.
	* NEWS: Add line about new --preprocessor-arg option for windres.

	* binutils-all/windres/windres.exp: Add '// cpparg <option>' command
	to rc file interpretation to specify addition pre-processor commands
	as script option.
	* binutils-all/windres/strtab3.rc: New.
	* binutils-all/windres/strtab3.rsd: New.
	* binutils-all/windres/README: Add note about cpparg script option.
	argument

binutils/testsuite/binutils-all/windres/README

@@ -12,6 +12,7 @@ contains one command:
 
 	// parse-only
 	// xfail *-*-*
+	// cpparg <preprocessor options passed via --preprocessor-arg>
 
 parse-only must preceed any xfail commands, and indicates that a
 comparison with the *.rsd file will not happen.  xfail indicates when

binutils/testsuite/binutils-all/windres/strtab3.rc

@@ -0,0 +1,14 @@
+// cpparg -DTEST=1
+
+#include "windows.h"
+
+LANGUAGE 0, 0
+
+STRINGTABLE MOVEABLE PURE DISCARDABLE
+BEGIN
+#ifdef TEST
+  1 "hello, world"
+#else
+  1 "fail"
+#endif
+END

binutils/testsuite/binutils-all/windres/strtab3.rsd

@@ -0,0 +1,8 @@
+ 0000 00000000 20000000 ffff0000 ffff0000  .... ...........
+ 0010 00000000 00000000 00000000 00000000  ................
+ 0020 38000000 20000000 ffff0600 ffff0100  8... ...........
+ 0030 00000000 30100000 00000000 00000000  ....0...........
+ 0040 00000c00 68006500 6c006c00 6f002c00  ....h.e.l.l.o.,.
+ 0050 20007700 6f007200 6c006400 00000000   .w.o.r.l.d.....
+ 0060 00000000 00000000 00000000 00000000  ................
+ 0070 00000000 00000000                    ........        

binutils/testsuite/binutils-all/windres/windres.exp

@@ -56,6 +56,7 @@ foreach res $res_list {
     set sroot [file rootname $res]
     set broot [file tail $sroot]
     set done 0
+    set cpp_opts ""
 
     set rc [open $res]
     while { [gets $rc line] != -1 } {
@@ -66,10 +67,14 @@ foreach res $res_list {
 	    setup_xfail $sys
 	    continue
 	}
+	if [regexp "cpparg *(\[^ \]*)" $line junk cppopt] {
+	    set cpp_opts "--preprocessor-arg \"$cppopt\""
+	    continue
+	}
     }
 
     verbose "$wr -J rc -O res $res tmpdir/$broot.res" 1
-    catch "exec $wr -J rc -O res $res tmpdir/$broot.res" err
+    catch "exec $wr $cpp_opts -J rc -O res $res tmpdir/$broot.res" err
 
     if ![string match "" $err] then {
 	send_log "$err\n"