Re: gcj static crosscompiling raises issues with boehm-gc

On 10/06/2010 09:43 AM, Andreas Frisch wrote:
> hi gcj experts,
> 
> i've spent some time already trying to statically cross compile a java source 
> for an embedded mipsel architecture. i'm using openembedded and gcc-4.4.4 with 
> the latest java part imported from master
> 
> in the makefile, i am using the command
> 
> $(CROSS_COMPILE)gcj $(JFLAGS) $(SOURCES) \
> 		-static-libgcj \
> 		-fjni \
> 		-g \
> 		-o dumphd-mipsel-static \
> 		 --main=dumphd.core.DumpHD \
> 		-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 \
> 		-shared-libgcc -Wl,-non_shared -lgcj -Wl,-call_shared -lstdc++ -
> Wl,--as-needed -lgcc_s -lpthread -lc -lm -ldl -lrt -Wl,--no-as-needed -Wl,-O1
> 
> this may contain a lot of redundancies or look silly in many ways but for 
> right now i just aggregated as much as possible in there from what i could find 
> online.
> 
> i've also set 
> CLASSPATH=/dream/oe1.6/dm8000/build/tmp/cross/mipsel/bin/ecj.jar:./
> 
> when i run make, linking fails:
> 
> /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 00000000004084b0
> /dream/oe1.6/dm8000/build/tmp/cross/mipsel/lib/gcc/mipsel-oe-
> linux/4.4.4/../../../../mipsel-oe-linux/lib/libgcj.a(dyn_load.o): In function 
> `GC_register_dynamic_libraries_dl_iterate_phdr':
> /dream/oe1.6/dm8000/build/tmp/work/mipsel-oe-linux/gcc-cross-4.4.4-
> r0.1/gcc-4.4.4/boehm-gc/dyn_load.c:454: undefined reference to `__data_start'
> /dream/oe1.6/dm8000/build/tmp/cross/mipsel/lib/gcc/mipsel-oe-
> linux/4.4.4/../../../../mipsel-oe-linux/lib/libgcj.a(os_dep.o): In function 
> `GC_register_data_segments':
> /dream/oe1.6/dm8000/build/tmp/work/mipsel-oe-linux/gcc-cross-4.4.4-
> r0.1/gcc-4.4.4/boehm-gc/os_dep.c:1450: undefined reference to `__data_start'
> collect2: ld returned 1 exit status
> make: *** [dumphd-static-new] Error 1
> 
> i'd be grateful for any suggestions or hints.

This looks completely broken: it seems to be trying to statically link
against libgcj.  Try it without -non_shared.

Andrew.