Am Mittwoch, 6. Oktober 2010, um 08:51:40 schrieb David Daney:
On 10/06/2010 07:25 AM, Andrew Haley wrote:
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.
To expound on this, the '-static-libgcj' option was created so that all
the other things you have there would be unneeded.
I doubt you want any of: -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
Start off with -static-libgcj on a very simple 'hello-world' type
program. Then start adding all your other things in.
David Daney
hi david!
actually i was already successful statically cross compiling java programs as
complex as projectx:
it works both the traditional way
projectx-static-oldfashioned: $(OBJS)
$(CROSS_COMPILE)gcj $(JFLAGS) -c -o ac3.o --resource ac3.bin
../resources/ac3.bin
$(CROSS_COMPILE)gcj $(JFLAGS) -c -o pjxresources_en.o --resource
pjxresources_en.properties ../resources/pjxresources_en.properties
$(CROSS_COMPILE)gcj $(JFLAGS) $(OBJS) pjxresources_en.o ac3.o -
Djava.awt.headless=true --main=net.sourceforge.dvb.projectx.common.Start -
save-temps
$(CROSS_COMPILE)gcc -o projectx $(OBJS) pjxresources_en.o ac3.o
./net.sourceforge.dvb.projectx.common.Startmain.i \
-shared-libgcc -Wl,-non_shared -lgcj -Wl,-call_shared -lsupc++ -Wl,--as-
needed -lgcc_s -lpthread -lc -lm -ldl -lrt -Wl,--no-as-needed
$(CROSS_COMPILE)strip --strip-all projectx
and with the new nifty -static-libgcj convenience parameter
projectx-static:
$(CROSS_COMPILE)gcj $(JFLAGS) -c -o ac3.o --resource ac3.bin
../resources/ac3.bin
$(CROSS_COMPILE)gcj $(JFLAGS) -c -o pjxresources_en.o --resource
pjxresources_en.properties ../resources/pjxresources_en.properties
$(CROSS_COMPILE)gcj -static-libgcj -o projectx $(SOURCES)
pjxresources_en.o ac3.o \
-Djava.awt.headless=true --main=net.sourceforge.dvb.projectx.common.Start
$(CROSS_COMPILE)strip --strip-all projectx
however, what's different about this new program is that it requires that c++
compiled shared object libaacskeys.so and that's what causes my problems i
guess