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Re: Undefined references for SWT

From: "Harpal Grover" <harpal dot grover at gmail dot com>
To: "GCC Java" <java at gcc dot gnu dot org>
Date: Sun, 11 Feb 2007 11:27:15 -0500
Subject: Re: Undefined references for SWT
References: <1e76f07c0702102016k428c811dr31cde3cb5f8f4bde@mail.gmail.com> <17870.58516.497107.725164@zebedee.pink> <1e76f07c0702110600v7e8ee32dk6cced5f2df0c3619@mail.gmail.com> <45CF2377.4090107@gmx.ch> <1e76f07c0702110716n71cf8403jec582b073ea95cce@mail.gmail.com> <45CF373A.2070507@gmx.ch>

Okay,  I stated in my first post I am using GCJ for MingW  GCC/GCJ 4.3
(gcj-eclipse-merge-branch) on Windows XP, AMD 2.1 GHZ 512 MB

What I did not state I guess is I am using gcjbuilder, an eclipse
plugin to automate the build process :p  It creates a make file for
you. So I have included the make file:


# 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)/./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

#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= -O1

#compiler debug level
DEBUGLEVEL= -g0


#object targets
%.o:	%.java
	$(GCJ) $(CP)  -c $? -o $@
	
##################
#dummy targets (depend on config)

#classpath objects target
$(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)

So, the way this is executed is by the following line in MSYS :

$ make
mkdir -p release/resource
gcj  -O1 -g0  -c
--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;./;"
C:/thisiscool-gcc/swt/win32/3218/swt.jar -orelease/swt.jar.o
--main=App -fjni release/./gface_0.9.1.jar.o release/./swt.jar.o
App.o  -orelease/scnlm.exe -Lrelease

Is this more helpful? :)

On 2/11/07, Marco Trudel <mtrudel@gmx.ch> wrote:

Harpal Grover wrote:
> I think I figured out what may be the swt,

I don't understand that....


> I guess it's because the
> the swt.jar wasn't the first jar being compiled in the command, so the
> other jar's that relied on the swt library were failing.

I don't understand tha

>> 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.
>> >>
>> >
>> >
>>
>>
>
>

--
Harpal Grover
President
Harpal Grover Consulting Inc

Follow-Ups:
- Re: Undefined references for SWT
  - From: Marco Trudel

References:
- Undefined references for SWT
  - From: Harpal Grover
- Re: Undefined references for SWT
  - From: Andrew Haley
- Re: Undefined references for SWT
  - From: Harpal Grover
- Re: Undefined references for SWT
  - From: Marco Trudel
- Re: Undefined references for SWT
  - From: Marco Trudel

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