Make building of Windows .hlp file optional

By using && and || operators in the build recipe, the building of WinBoard
with Cygwin is now not aborted whe the Help Compiler is not installed.

diff --git a/winboard/makefile.gcc b/winboard/makefile.gcc
index fcf842f..77fc0b9 100644 (file)
--- a/winboard/makefile.gcc
+++ b/winboard/makefile.gcc
@@ -63,10 +63,7 @@ clean:
 \r
 # Update the help file if necessary\r
 $(PROJ).hlp : $(PROJ).rtf\r
-       $(HC) $(PROJ).hpj\r
-       @cat $(PROJ).err\r
-       @mv $(PROJ).hlp tmp.hlp\r
-       @mv tmp.hlp $(PROJ).hlp # these moves to get the case right\r
+       $(HC) $(PROJ).hpj && @cat $(PROJ).err && @mv $(PROJ).hlp tmp.hlp && @mv tmp.hlp $(PROJ).hlp || true # these moves to get the case right\r
 \r
 \r
 # Update the resource if necessary\r