On 12.08.21 07:50, C Smith wrote: > Hi Jan,Thanks for your prompt reply. I reduced my very large app to > about 200 lines, it only starts one periodic process. but I still get > this error during linkage: > > /usr/xenomai/lib/xenomai/bootstrap.o: In function `xenomai_main': > /usr/src/xenomai-3.1/lib/boilerplate/init/bootstrap.c:94: multiple > definition of `xenomai_main' > /usr/xenomai/lib/xenomai/bootstrap.o:/usr/src/xenomai-3.1/lib/boilerplate/init/bootstrap.c:94: > first defined here > /usr/xenomai/lib/xenomai/bootstrap.o:(.rodata+0x0): multiple definition > of `xenomai_auto_bootstrap' > /usr/xenomai/lib/xenomai/bootstrap.o:(.rodata+0x0): first defined here > /usr/xenomai/lib/xenomai/bootstrap.o: In function `xenomai_main': > /usr/src/xenomai-3.1/lib/boilerplate/init/bootstrap.c:94: multiple > definition of `xenomai_main' > /usr/xenomai/lib/xenomai/bootstrap.o:/usr/src/xenomai-3.1/lib/boilerplate/init/bootstrap.c:94: > first defined here > /usr/xenomai/lib/xenomai/bootstrap.o:(.rodata+0x0): multiple definition > of `xenomai_auto_bootstrap' > /usr/xenomai/lib/xenomai/bootstrap.o:(.rodata+0x0): first defined here > /usr/xenomai/lib/xenomai/bootstrap.o: In function `xenomai_main': > /usr/src/xenomai-3.1/lib/boilerplate/init/bootstrap.c:94: multiple > definition of `xenomai_main' > /usr/xenomai/lib/xenomai/bootstrap.o:/usr/src/xenomai-3.1/lib/boilerplate/init/bootstrap.c:94: > first defined here > /usr/xenomai/lib/xenomai/bootstrap.o:(.rodata+0x0): multiple definition > of `xenomai_auto_bootstrap' > /usr/xenomai/lib/xenomai/bootstrap.o:(.rodata+0x0): first defined here > collect2: error: ld returned 1 exit status > make[1]: *** [<builtin>: myapp] Error 1 > > I had used your advice to get the compiler args in my Makefile with: > /usr/xenomai/bin/xeno-config --skin=native --cflags --ldflags > The resulting command line is: > > gcc -g3 -m32 -I/usr/xenomai/include/trank -D__XENO_COMPAT__ > -I/usr/xenomai/include/cobalt > -I/usr/xenomai/include -m32 -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE > -D_REENTRANT -fasynchronous-unwind-tables > -D__COBALT__ -I/usr/xenomai/include/alchemy -I/usr/xenomai/include/rtdm > -Wl,--no-as-needed -ltrank > -Wl,@/usr/xenomai/lib/modechk.wrappers -lalchemy -lcopperplate > /usr/xenomai/lib/xenomai/bootstrap.o > -Wl,--wrap=main -Wl,--dynamic-list=/usr/xenomai/lib/dynlist.ld > -L/usr/xenomai/lib -lcobalt -lmodechk > -lpthread -lrt -m32 -lfuse -pthread -I/usr/include/libxml2 -I"SOEM/" > -I"SOEM/osal" -I"SOEM/oshw/linux" > -I"SOEM/soem" -I"../include/nanopb" -Xlinker -rpath -Xlinker > /usr/xenomai/lib myapp.c ../include/myapp.h > ../include/dia_dev_myapp.h ../include/crc_table.h ../include/dacdefs.h > ../include/version.h > ../include/canopen_drives.h ../include/adcdefs.h > ../include/myapp_version.h ../include/canodefs.h > ../include/preproc_myapp.h ../include/myapp_mem_manager_data.h > ../include/comm_dta_myapp.h ../include/comproto.h > ../modules/rtdinsync.h quad.o dac.o adc.o SOEM/lib/linux/liboshw.a > SOEM/lib/linux/libosal.a SOEM/lib/linux/libsoem.a > ../include/nanopb/nanopb.a -Wl,--no-as-needed -ltrank > -Wl,@/usr/xenomai/lib/modechk.wrappers -lalchemy -lcopperplate > /usr/xenomai/lib/xenomai/bootstrap.o -Wl,--wrap=main > -Wl,--dynamic-list=/usr/xenomai/lib/dynlist.ld > -L/usr/xenomai/lib -lcobalt -lmodechk -lpthread -lrt -m32 -lfuse > -pthread -Wl,--no-as-needed > -Wl,@/usr/xenomai/lib/cobalt.wrappers -Wl,@/usr/xenomai/lib/modechk.wrappers > /usr/xenomai/lib/xenomai/bootstrap.o -Wl,--wrap=main > -Wl,--dynamic-list=/usr/xenomai/lib/dynlist.ld > -L/usr/xenomai/lib -lcobalt -lmodechk -lpthread -lrt -m32 -lfuse > -pthread -Wl,--no-as-needed > -Wl,@/usr/xenomai/lib/cobalt.wrappers -Wl,@/usr/xenomai/lib/modechk.wrappers > /usr/xenomai/lib/xenomai/bootstrap.o -Wl,--wrap=main > -Wl,--dynamic-list=/usr/xenomai/lib/dynlist.ld > -L/usr/xenomai/lib -lcobalt -lmodechk -lpthread -lrt -m32 -lfuse > -pthread -lxml2 -lz -llzma -lm > -ldl -L"SOEM/lib/linux" -Wl,--start-group -loshw -losal -lsoem > -Wl,--end-group -lm -o myapp > > What is going wrong with the linkage? Thanks, C Smith >
Something is broken in your makefile. If you look at the end of the resulting gcc call above, you see e.g. bootstrap.o being listed multiple times (which explains the error, obviously). This is not coming from xeno-config. So check your local setup, or just do gcc $(xeno-config ...) -o my-app my-app.c -I my-includes Jan -- Siemens AG, T RDA IOT Corporate Competence Center Embedded Linux
