Problem compiling apache libraries

Fri Feb 9 12:39:00 GMT 2007

Mohsen Saboorian wrote:
> Thanks for the reply.
>> I could compile those libs with that option.
>> By compiling jar files into object files, I'll no more need to add
> those jar files in classpath, right?
>> Now, I want to compile the whole project into a single executable
> file. I use the following commang line:
> gcj --main=MainClass -findirect-dispatch apache-commons.o
> log4j-1.2.8.o swt-win32.o velocity-tools-generic-1.2.o velocity-1.4.o
> zekr.o
>> where all the needed runtime jars added as .o file, but GCJ gives a
> lot of error messages complaining "undefined reference to
> XYZ::class$$'"
> e.g.
> swt-win32.jar:(.data+0x2f110): undefined reference to `_ZN
> 3org7eclipse3swt8internal8Callback4bindEJiPS3_PN4java4lang6ObjectEPNS6_6StringESA_ibbi' 
>>> Is there any trick to bypass these reference errors?

I think you forget to add all the compiled jars to the classpath. Your 
command should look something like:
gcj --main=MainClass -findirect-dispatch
	apache-commons.o
	-Iapache-commons.jar
	log4j-1.2.8.o
	-Ilog4j-1.2.8.jar
	...
Marco
> Thanks.
>> On 2/9/07, Marco Trudel <mtrudel@gmx.ch> wrote:
>> Mohsen Saboorian wrote:
>> > Hi,
>> >
>> > I'm trying to compile a project into native form using GCJ. The
>> > project depends on some of apache commons libraries plus velocity and
>> > log4j. I was able to compile log4j (1.2.8) into .obj format, by
>> > removing package: org.apache.log4j.jmx. Unfortunately I cannot compile
>> > Velocity 1.4, because of it's referencing to many other packages
>> > (still unused):
>> > - org.apache.velocity.anakia.* to JDOM
>> > - org.apache.velocity.convert.WebMacro to ant
>> > - ...
>> >
>> > Is it possible to compile libraries like Velocity, ignoring unused
>> > library references?
>>>> Compiling with the "-findirect-dispatch" flag will do that.
>>>> > Is there any place to download already natively-compiled apache 
>> libraries?
>>>> Not that I know of... IMHO, it wouldn't make sense anyway.
>>>>>> Marco
>>>