Good day,
We have started to compile libbpf as part of our Linux compilation build plan, however libbpf fails to cross-compile for arm64 on Linux 4.14, but succeeds on Linux 4.19 tree.
We compile libbpf with the following command: make -C <whatever>/linux-4.14.91/tools/lib/bpf ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- install
And get the below output on 4.14 tree: Auto-detecting system features: ... libelf: [ on ] ... bpf: [ on ]
CC /cfsetup_build/build/arm64/libbpf/libbpf.o CC /cfsetup_build/build/arm64/libbpf/bpf.o LD /cfsetup_build/build/arm64/libbpf/libbpf-in.o ld: /cfsetup_build/build/arm64/libbpf/libbpf.o: Relocations in generic ELF (EM: 183) ld: /cfsetup_build/build/arm64/libbpf/libbpf.o: Relocations in generic ELF (EM: 183) ld: /cfsetup_build/build/arm64/libbpf/libbpf.o: Relocations in generic ELF (EM: 183) ld: /cfsetup_build/build/arm64/libbpf/libbpf.o: Relocations in generic ELF (EM: 183) ld: /cfsetup_build/build/arm64/libbpf/libbpf.o: Relocations in generic ELF (EM: 183) ld: /cfsetup_build/build/arm64/libbpf/libbpf.o: Relocations in generic ELF (EM: 183) /cfsetup_build/build/arm64/libbpf/libbpf.o: error adding symbols: File in wrong format /cfsetup_build/build/linux-4.14.91/tools/build/Makefile.build:144: recipe for target '/cfsetup_build/build/arm64/libbpf/libbpf-in.o' failed make[2]: *** [/cfsetup_build/build/arm64/libbpf/libbpf-in.o] Error 1 Makefile:158: recipe for target '/cfsetup_build/build/arm64/libbpf/libbpf-in.o' failed make[1]: *** [/cfsetup_build/build/arm64/libbpf/libbpf-in.o] Error 2
Backporting the following commit fixed the build: 7ed1c1901fe52e6c5828deb155920b44b0adabb1: tools: fix cross-compile var clobbering
Can we have it officially applied to the Linux 4.14 tree, please?
Regards, Ignat