[Boost-build] small patch to allow debugging of bat files on windows

From: Roland Schwarz (roland.schwarz_at_[hidden])
Date: 2007-08-06 10:36:02

Symptoms:

On windows when bjam is invoked with -d+2
it will (occasionally) print out the name
of a temporary batch file.
This is not very useful by itself since the
file is beeing deleted after run.

When using -d+4 instead it will print the
information whether the command is invoked
dircetly or via a bat file. This is also not
always enough.

I attached a small patch, so -d+4 will also
show the batchfiles content.

Roland aka speedsnail

Index: tools/jam/src/execnt.c
===================================================================
--- tools/jam/src/execnt.c	(revision 38436)
+++ tools/jam/src/execnt.c	(working copy)
@@ -268,8 +268,6 @@
         }
         fputs( command, f );
         fclose( f );
-
-        command = cmdtab[ slot ].tempfile_bat;
         
         if( DEBUG_EXECCMD )
         {
@@ -277,7 +275,10 @@
                 printf("using user-specified shell: %s", shell->string);
             else
                 printf("Executing through .bat file\n");
+                printf("%s\n", command);
         }
+        
+        command = cmdtab[ slot ].tempfile_bat;
     }
 
     /* Formulate argv; If shell was defined, be prepared for % and ! subs. */