add initial information

diff --git a/winsup/cygwin/how-to-debug-cygwin.txt b/winsup/cygwin/how-to-debug-cygwin.txt
index 2549565..cf10baf 100644 (file)
--- a/winsup/cygwin/how-to-debug-cygwin.txt
+++ b/winsup/cygwin/how-to-debug-cygwin.txt
@@ -87,7 +87,9 @@ set CYGWIN_DEBUG=cat.exe=gdb.exe
    This will force gdb.exe to start when the program name contains the string
    "cat.exe".  The '=gdb.exe' isn't really needed, since it is the default.
    It is just there to show how you can specify a program to run when the
-   program starts.
+   program starts.  You can optionally set a breakpoint on "break_here"
+   once the debugger pops up and then you can single step through the
+   initialization process.
 
    Note that it bears repeating that both of the above options are *only*
    available when configuring cygwin with --enable-debugging.