Re: gcj static crosscompiling raises issues with boehm-gc

[David Daney <ddaney@caviumnetworks.com>]

Normally I leave the list CCed.  It is my personal policy not to respond 
to private messages of this nature, but I am making an exception for 
this one.

On 10/06/2010 10:53 AM, Andreas Frisch wrote:
>> Things can get complicated when linking in C++ code with the gcj driver
>> program.  I would think all you would need is -lsupc++, and perhaps
>> -lstdc++.
>>
>> -nostdlib looks a bit questionable to me.
>>
>> In any event it is good to see that people are still making use of gcj
>> on mips.
>>
>> David Daney
>
> dear David,
>
> yeah it actually comes in very handy! if it just wasn't so tricky to use.
> okay soo where do i start... i mean i've literally spent a week trying to get
> this to link properly and i've tried maaaany combinations of the parameters
>
> i'll just put in some command lines along with excerpts of the respective
> error messages
>
>   --main=dumphd.core.DumpHD -static-libgcj
>          -L/dream/oe1.6/dm8000/build/tmp/staging/mipsel-oe-linux/usr/lib \
>          -L/dream/projects/bluray/aacskeys-0.4.0c-mipsel/lib/linux/ \
>          -Wl,-rpath-link,/dream/oe1.6/dm8000/build/tmp/staging/mipsel-oe-
> linux/usr/lib \
>          -Wl,-rpath-link,/dream/projects/bluray/aacskeys-0.4.0c-
> mipsel/lib/linux/ -laacskeys \
>          -Wl,-non_shared \
>          -Wl,-lstdc++ -lsupc++
>
> 10 problems (10 warnings)
> /dream/oe1.6/dm8000/build/tmp/cross/mipsel/lib/gcc/mipsel-oe-
> linux/4.4.4/../../../../mipsel-oe-linux/bin/ld: cannot find -lgcc_s
>
> ***
>
>   --main=dumphd.core.DumpHD -static-libgcj \
>          -nostdlib \
>          -L/dream/oe1.6/dm8000/build/tmp/staging/mipsel-oe-linux/usr/lib \
>          -L/dream/projects/bluray/aacskeys-0.4.0c-mipsel/lib/linux/ \
>          -Wl,-rpath-link,/dream/oe1.6/dm8000/build/tmp/staging/mipsel-oe-
> linux/usr/lib \
>          -Wl,-rpath-link,/dream/projects/bluray/aacskeys-0.4.0c-
> mipsel/lib/linux/ -laacskeys \
>          -Wl,-lstdc++ -lsupc++
>
> 10 problems (10 warnings)
> /dream/oe1.6/dm8000/build/tmp/cross/mipsel/lib/gcc/mipsel-oe-
> linux/4.4.4/../../../../mipsel-oe-linux/bin/ld: warning: libgcc_s.so.1, needed
> by /dream/projects/bluray/aacskeys-0.4.0c-mipsel/lib/linux//libaacskeys.so,
> not found (try using -rpath or -rpath-link)
> /dream/oe1.6/dm8000/build/tmp/cross/mipsel/lib/gcc/mipsel-oe-
> linux/4.4.4/../../../../mipsel-oe-linux/bin/ld: warning: cannot find entry
> symbol __start; defaulting to 00000000004015d0
> /tmp/cclqdxg7.o: In function `bdvm::vm::BDVMException::BDVMException()':
> ./source/bdvm/vm/BDVMException.java:(.text+0x2c): undefined reference to
> `java::lang::Exception::Exception()'
> /tmp/cclqdxg7.o: In function
> `bdvm::vm::BDVMException::BDVMException(java::lang::String*)':
> ./source/bdvm/vm/BDVMException.java:(.text+0x8c): undefined reference to
> `java::lang::Exception::Exception(java::lang::String*)'
> /tmp/cclqdxg7.o: In function
> `bdvm::vm::BDVMException::BDVMException(java::lang::String*,
> java::lang::Throwable*)':
> ./source/bdvm/vm/BDVMException.java:(.text+0x100): undefined reference to
> `java::lang::Exception::Exception(java::lang::String*,
> java::lang::Throwable*)'
> /tmp/cclqdxg7.o: In function
> `bdvm::vm::BDVMException::BDVMException(java::lang::Throwable*)':
> ./source/bdvm/vm/BDVMException.java:(.text+0x160): undefined reference to
> `java::lang::Exception::Exception(java::lang::Throwable*)'
> /tmp/cclqdxg7.o: In function
> `dumphd::bdplus::ConversionTable::ConversionTable()':
> ./source/bdvm/vm/BDVMException.java:(.text+0x1b4): undefined reference to
> `java::lang::Object::Object()'
> ./source/bdvm/vm/BDVMException.java:(.text+0x1cc): undefined reference to
> `java::util::ArrayList::class$'
> 6000+ similar undefined refs
>
> ***
>
>   --main=dumphd.core.DumpHD -static-libgcj \
>          -L/dream/oe1.6/dm8000/build/tmp/staging/mipsel-oe-linux/usr/lib \
>          -L/dream/projects/bluray/aacskeys-0.4.0c-mipsel/lib/linux/ \
>          -Wl,-rpath-link,/dream/oe1.6/dm8000/build/tmp/staging/mipsel-oe-
> linux/usr/lib \
>          -Wl,-rpath-link,/dream/projects/bluray/aacskeys-0.4.0c-
> mipsel/lib/linux/ -laacskeys \
>          -Wl,-lstdc++ -lsupc++
>
> 10 problems (10 warnings)
> /tmp/ccWdYPef.o:(.data+0x5638): undefined reference to `hidden alias for
> java::lang::String* dumphd::aacs::AACSKeys::getVersionString()'
> /tmp/ccWdYPef.o:(.data+0x563c): undefined reference to `hidden alias for void
> dumphd::aacs::AACSKeys::getKeys(java::lang::String*, dumphd::core::KeyData*)'
> /tmp/ccWdYPef.o:(.data+0x5680): undefined reference to `hidden alias for
> java::lang::String* dumphd::aacs::AACSKeys::getVersionString()'
> /tmp/ccWdYPef.o:(.data+0x5694): undefined reference to `hidden alias for void
> dumphd::aacs::AACSKeys::getKeys(java::lang::String*, dumphd::core::KeyData*)'
> collect2: ld returned 1 exit status
>
>
> the parameter set in my original post (with the boehm-gc errors) led me the
> farthest, as far as i can tell. at least there were no complaints about
> linking the java sources and that c++ library, possible though that it failed
> in an earlier state of the linking process - i don't really know
>
> still open for more suggestions, i am available on instant messangers or irc
> too for live trial and error experiments :)
> andy@snaut.ath.cx thorugh jabber/xmpp or fraxinas on ircnet or freenode irc

The GCJ IRC channel typically has the highest concentration of gcj 
experts available on this planet.

David Daney