Warning without cleanbuild

Alan Bateman Alan.Bateman at oracle.com
Mon Aug 22 09:10:23 UTC 2011

Sebastian Sickelmann wrote:
> Hi,
> i sometimes get this warning if i don't execute a "make clean" before 
> my "make all" in jdk repository.
> /home/sebastian/deve/openjdk8/build/linux-i586/j2sdk-image/bin/javac 
> -J-XX:ThreadStackSize=768 -J-XX:-PrintVMOptions 
> -J-XX:+UnlockDiagnosticVMOptions -J-XX:-LogVMOutput -J-client 
> -J-Xmx512m -J-Xms512m -J-XX:PermSize=32m -J-XX:MaxPermSize=160m 
> -Werror -Xlint:all -Xlint:-path -source 7 -target 7 -encoding ascii 
> -Xbootclasspath:../../../build/linux-i586/classes -sourcepath 
> ../../../build/linux-i586/gensrc:../../../src/solaris/classes:../../../src/share/classes 
> -d ../../../build/linux-i586/classes 
> @../../../build/linux-i586/tmp/java/java.nio/nio/.classes.list.filtered
> ../../../src/solaris/classes/sun/nio/ch/InheritedChannel.java:169: 
> warning: [rawtypes] found raw type: Constructor
>         Constructor ctr = 
> Reflect.lookupConstructor("java.io.FileDescriptor",
>         ^
>   missing type arguments for generic class Constructor<T>
>   where T is a type-variable:
>     T extends Object declared in class Constructor
> error: warnings found and -Werror specified
We had an intern in Oracle this summer doing excellent work to address 
warnings that javac reports when compiling with -Xlint:all. The approach 
was to clean-up all warnings in an area and then change the make file 
for the area to add -Xlint:all -Werror so that we keep the area warning 
free. In this case it looks like one raw type in one source file was 
missed. Missed because it's compiled implicitly when doing a full build. 
However when compiled with make/java/nio/Makefile then it's compiling 
with -Xlint:all -Werror. I've created 7081796 to track this and we 
should have the fix in jdk8/tl/jdk today.


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