Undefined references for SWT

Sun Feb 11 14:09:00 GMT 2007

Harpal Grover wrote:
> Here is my makefile, which shows all of the gcj runtime parameters
> (org.eclipse.swt.windgets.Control is in the swt.jar):
>> # Generated by Eclipse GCJ Builder
> # http://gcjbuilder.sf.net
>> #global targets
> ALL: main
> all: main
>> #gcj variable
> GCJ=gcj $(OPTLEVEL) $(DEBUGLEVEL) $(COMPILER_OPTIONS)
>> #binary output folder
> BINOUT= release
>> #compiler options
> COMPILER_OPTIONS=
>> #linker options
> LINKER_OPTIONS=
>> #object list
> OBJ=App.o
>> #custom objects
> CUSTOM_OBJ=
>> #jar objects
> CPOBJ=$(BINOUT)/./nebula_grid_ALPHA.jar.o
> $(BINOUT)/./gface_0.9.1.jar.o $(BINOUT)/./swt.jar.o
>> #jar so
> CPSO=
>> #project classpath
> CP="--classpath=C:/projects/java/TSCN/Desktop/lib/h2.jar;C:/projects/java/TSCN/Desktop/lib/nebula_grid_ALPHA.jar;C:/projects/java/TSCN/Desktop/lib/ktable_2.1.3.jar;gface_0.9.1.jar;C:/thisiscool-gcc/swt/win32/3218/swt.jar;./;" 
>>> #main class (or so output)
> MAINCLASS=--main=App -fjni

I only see -fjni here for the main compilation.
> #binary name (exe or so)
> BIN=$(BINOUT)/scnlm.exe
>> #library path list
> LIBRARYPATH=-L$(BINOUT)
>> #libraries (so) list
> LIBRARIES=
>> #resource objects list
> RESOB=
>> #compiler optimization level
> OPTLEVEL= -O3
>> #compiler debug level
> DEBUGLEVEL= -g0
>>> #object targets
> %.o: %.java
> $(GCJ) $(CP) -c $? -o $@

Here -fjni is missing if this compiles swt to an object. But I was too 
lazy to take a close look at this huge (in comparison to some little 
short manual commands which would have been a good alternative) 
makefile. So I might be wrong...
Marco
> ##################
> #dummy targets (depend on config)
>> #classpath objects target
> $(BINOUT)/./nebula_grid_ALPHA.jar.o
> :C:/projects/java/TSCN/Desktop/lib/nebula_grid_ALPHA.jar
> $(GCJ) -c $(CP)
> C:/projects/java/TSCN/Desktop/lib/nebula_grid_ALPHA.jar
> -o$(BINOUT)/nebula_grid_ALPHA.jar.o
> $(BINOUT)/./gface_0.9.1.jar.o :gface_0.9.1.jar
> $(GCJ) -c $(CP) gface_0.9.1.jar -o$(BINOUT)/gface_0.9.1.jar.o
> $(BINOUT)/./swt.jar.o :C:/thisiscool-gcc/swt/win32/3218/swt.jar
> $(GCJ) -c $(CP) C:/thisiscool-gcc/swt/win32/3218/swt.jar 
> -o$(BINOUT)/swt.jar.o
>>> #classpath so target
>>> #resource objects target
>>>> #################
>>> #main target
>> main: setup $(CPOBJ) $(RESOB) $(OBJ) $(CPSO)
> $(GCJ) $(LINKER_OPTIONS) $(MAINCLASS) $(CPOBJ) $(CUSTOM_OBJ) $(RESOB)
> $(OBJ) -o$(BIN) $(LIBRARYPATH) $(LIBRARIES) $(CPSO)
>> #setup output folders
> setup:
> mkdir -p $(BINOUT)/resource
>> #clean target
> clean:
> rm -f `find . -name "*.o"`
> rm -r $(BINOUT)
>> On 2/11/07, Andrew Haley <aph@redhat.com> wrote:
>> Harpal Grover writes:
>> > Hi,
>> >
>> > I am using GCJ for MingW GCC/GCJ 4.3 (gcj-eclipse-merge-branch).
>> >
>> > I am getting the following errors when I attempt to compile not only
>> > my java code, but referenced jars as well:
>> >
>> >
>> >
>> > org/vafada/swtcalendar/SWTCalendar.o:SWTCalendar.java:(.data+0xc28):
>> > undefined reference to
>> > `org::eclipse::swt::widgets::Control::isActive()'
>> >
>> > org/vafada/swtcalendar/SWTCalendar.o:SWTCalendar.java:(.data+0xc2c):
>> > undefined reference to
>> > `org::eclipse::swt::widgets::Control::isEnabled()'
>> >
>> > org/vafada/swtcalendar/SWTCalendar.o:SWTCalendar.java:(.data+0xc30):
>> > undefined reference to
>> > `org::eclipse::swt::widgets::Control::isFocusControl()'
>> >
>> > org/vafada/swtcalendar/SWTCalendar.o:SWTCalendar.java:(.data+0xc34):
>> > undefined reference to
>> > 
>> `org::eclipse::swt::widgets::Control::isFocusAncestor(org::eclipse::swt::widgets::Control*)' 
>>>> >
>> > org/vafada/swtcalendar/SWTCalendar.o:SWTCalendar.java:(.data+0xc38):
>> > undefined reference to
>> > `org::eclipse::swt::widgets::Control::isReparentable()'
>> >
>> > org/vafada/swtcalendar/SWTCalendar.o:SWTCalendar.java:(.data+0xc3c):
>> > undefined reference to
>> > `org::eclipse::swt::widgets::Control::isShowing()'
>> > I have included the swt.jar that MingW provides in the classpath. I
>> > have also used the -fjni flag. I must be missing something here. Can
>> > anyone give me any pointers?
>>>> You haven't give us enough information. In which jar is
>> org.eclipse.swt.windgets.Control? Did you compile it? What compile
>> args did you use?
>>>> Andrew.
>>>>