On Thu, Aug 11, 2022 at 03:20:43PM +0100, Russell King (Oracle) wrote: > Hi, > > Please can someone try to explain what is going on when I ask for a .S > file to be built to an object with 5.19 and GNU make 4.3 from Debian > Bullseye (although I don't think this is a make version issue): > > $ rm ../build/multi/arch/arm/lib/findbit.o > $ make -j2 CROSS_COMPILE="arm-linux-gnueabihf-" ARCH="arm" O=../build/multi arch/arm/lib/findbit.o > make[1]: Entering directory '/home/rmk/git/build/multi' > GEN Makefile > CALL /home/rmk/git/linux-rmk/scripts/atomic/check-atomics.sh > CALL /home/rmk/git/linux-rmk/scripts/checksyscalls.sh > make[3]: *** No rule to make target 'arch/arm/lib/findbit.o'. Stop. > make[2]: *** [/home/rmk/git/linux-rmk/scripts/Makefile.build:441: __build] Error 2 > make[1]: *** [/home/rmk/git/linux-rmk/Makefile:1843: arch/arm] Error 2 > make[1]: *** Waiting for unfinished jobs.... > AS arch/arm/lib/findbit.o > make[1]: Leaving directory '/home/rmk/git/build/multi' > make: *** [Makefile:219: __sub-make] Error 2 FWIW, I think this is to do with lib-y directories rather than wheether the object is C or assembly: [mark@lakrids:~/src/linux]% ls arch/arm64/lib clear_page.S copy_from_user.S copy_template.S crc32.S delay.c insn.c Makefile memcmp.S memset.S strchr.S strlen.S strnlen.S tishift.S xor-neon.c clear_user.S copy_page.S copy_to_user.S csum.c error-inject.c kasan_sw_tags.S memchr.S memcpy.S mte.S strcmp.S strncmp.S strrchr.S uaccess_flushcache.c [mark@lakrids:~/src/linux]% usekorg 12.1.0 make ARCH=arm64 CROSS_COMPILE=aarch64-linux- arch/arm64/lib/insn.o CALL scripts/checksyscalls.sh CALL scripts/atomic/check-atomics.sh make[2]: *** No rule to make target 'arch/arm64/lib/insn.o'. Stop. make[1]: *** [scripts/Makefile.build:441: __build] Error 2 make: *** [Makefile:1844: arch/arm64] Error 2 [mark@lakrids:~/src/linux]% usekorg 12.1.0 make ARCH=arm64 CROSS_COMPILE=aarch64-linux- arch/arm64/lib/copy_page.o CALL scripts/checksyscalls.sh CALL scripts/atomic/check-atomics.sh make[2]: *** No rule to make target 'arch/arm64/lib/copy_page.o'. Stop. make[1]: *** [scripts/Makefile.build:441: __build] Error 2 make: *** [Makefile:1844: arch/arm64] Error 2 [mark@lakrids:~/src/linux]% usekorg 12.1.0 make ARCH=arm64 CROSS_COMPILE=aarch64-linux- arch/arm64/lib CALL scripts/checksyscalls.sh CALL scripts/atomic/check-atomics.sh AS arch/arm64/lib/clear_page.o AS arch/arm64/lib/clear_user.o AS arch/arm64/lib/copy_from_user.o AS arch/arm64/lib/copy_page.o AS arch/arm64/lib/copy_to_user.o CC arch/arm64/lib/csum.o CC arch/arm64/lib/delay.o CC arch/arm64/lib/insn.o AS arch/arm64/lib/memchr.o AS arch/arm64/lib/memcmp.o AS arch/arm64/lib/memcpy.o AS arch/arm64/lib/memset.o AS arch/arm64/lib/strchr.o AS arch/arm64/lib/strcmp.o AS arch/arm64/lib/strlen.o AS arch/arm64/lib/strncmp.o AS arch/arm64/lib/strnlen.o AS arch/arm64/lib/strrchr.o AS arch/arm64/lib/tishift.o AR arch/arm64/lib/lib.a AS arch/arm64/lib/crc32.o AS arch/arm64/lib/mte.o AR arch/arm64/lib/built-in.a ... clearly it figures how to build the directory as a whole, but can't figure out how to build indiviual objects within that. Thanks, Mark
