[cdt-dev] problem with internal builder on windows

[Jesper Eskilson <jesper@xxxxxxxxxxx>]

Hi all,

I've got a toolchain which does not behave properly. The symptoms are
that the internal builder refuses to recognize that anything needs to
build (even when a file has been edited), i.e. it prints the following
on the console:

> 
> 
> **** Build of configuration Debug for project testproj ****
> 
> **** Internal Builder is used for build               ****
> Nothing to build for testproj
> 
> 

The bug appears consistently (for my toolchain) if two conditions are met:

1. The host platform is Windows. The bug does not appear on Linux.
2. The project type is an executable (as opposed to a static library).

When I run the toolchain under the debugger, I observed the following:

* The method CommonBuilder.invokeInternalBuilder creates a
DescriptionBuilder object, on which it invokes the method
getNumCommands(), which returns 0:

> 			DescriptionBuilder dBuilder = null;
> 			if (!isParallel)
> 				dBuilder = new DescriptionBuilder(des, buildIncrementaly, resumeOnErr, cBS);
> 
> 			if(isParallel || dBuilder.getNumCommands() > 0) {

[...]

> 			} else {
> 				buf = new StringBuffer();
> 				buf.append(ManagedMakeMessages.getFormattedString(NOTHING_BUILT, currentProject.getName()));
> 				buf.append(System.getProperty("line.separator", "\n")); //$NON-NLS-1$//$NON-NLS-2$
> 				consoleOutStream.write(buf.toString().getBytes());
> 				consoleOutStream.flush();
> 			}
> 

* The DescriptionBuilder object uses a local class called
BuildStepVisitor which has a visit method which looks like this:
> 
> 		public int visit(IBuildStep action) throws CoreException {
> 			if(fMonitor.isCanceled())
> 				return VISIT_STOP;
> 			
> 			if(DbgUtil.DEBUG)
> 				DbgUtil.trace("visiting step " + DbgUtil.stepName(action)); //$NON-NLS-1$
> 			if(!action.isRemoved()
> 					&& (!fBuildIncrementaly || action.needsRebuild())){
> 				if(DbgUtil.DEBUG)
> 					DbgUtil.trace("step " + DbgUtil.stepName(action) + " needs rebuild" ); //$NON-NLS-1$ //$NON-NLS-2$
> 				StepBuilder builder = getStepBuilder(action);//new StepBuilder(action, fCWD, fResumeOnErrs, fDir);
> 				
> 				if(fBuild){
> 					switch(builder.build(fOut, fErr, new SubProgressMonitor(fMonitor, builder.getNumCommands()))){
> 					case STATUS_OK:
> 						break;
> 					case STATUS_CANCELLED:
> 						fStatus = STATUS_CANCELLED;
> 						break;
> 					case STATUS_ERROR_BUILD:
> 					case STATUS_ERROR_LAUNCH:
> 					default:
> 						fStatus = STATUS_ERROR_BUILD; 
> 					break;
> 					}
> 				} else {
> 					fNumCommands += builder.getNumCommands();
> 				}
> 			}
> 			
> 			if(fStatus != STATUS_CANCELLED 
> 				&& (fResumeOnErrs || fStatus == STATUS_OK))
> 				return VISIT_CONTINUE;
> 			return VISIT_STOP;
> 		}

The builder.getNumCommands() method returns 0, thus indicating that
nothing needs to build. getNumCommands() in turn calls
getCommandBuilders(), but when I tried to examine its return value, I
got the following error:

> org.eclipse.debug.core.DebugException: com.sun.jdi.ClassNotLoadedException: Type has not been loaded occurred while retrieving component type of array.

I'll continue digging, but if anyone has a clue as to what the problem
is, please let me know.

--
/Jesper