[solved] Kernel 5.15 failing to compile for x86_64

For Developers
1

Tried using a build server with Almalinux 8.5 and openSUSE Tumbleweed, both give the same error of "missing libelf.h". Fresh clones from today's master. Has anyone else encountered this yet? Yes, I know 5.15 is still a testing kernel for x86. I am trying to test it.

matt@buildbox:~/openwrt> make V=s
make[2]: Entering directory '/home/matt/openwrt/scripts/config'
make[2]: 'conf' is up to date.
make[2]: Leaving directory '/home/matt/openwrt/scripts/config'
make[1]: Entering directory '/home/matt/openwrt'
make[2]: Entering directory '/home/matt/openwrt'
make[3]: Entering directory '/home/matt/openwrt/target/linux'
make[4]: Entering directory '/home/matt/openwrt/target/linux/x86'
rm -f /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/localversion
/home/matt/openwrt/scripts/kconfig.pl  + + /home/matt/openwrt/target/linux/generic/config-5.15 /home/matt/openwrt/target/linux/x86/config-5.15 /home/matt/o
awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' /home/matt/openwrt/.config >> /home/matt/openwrt/build_dir/target-x86_64_musl
echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.target
echo "# CONFIG_KALLSYMS_ALL is not set" >> /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.target
echo "CONFIG_KALLSYMS_UNCOMPRESSED=y" >> /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.target
/home/matt/openwrt/scripts/package-metadata.pl kconfig /home/matt/openwrt/tmp/.packageinfo /home/matt/openwrt/.config 5.15 > /home/matt/openwrt/build_dir/t
/home/matt/openwrt/scripts/kconfig.pl 'm+' '+' /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.target /dev/null /home/maconfig.set
mv /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.set /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linu
grep -v INITRAMFS /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.old > /home/matt/openwrt/build_dir/target-x86_64_musl/
echo 'CONFIG_INITRAMFS_SOURCE=""' >> /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.set
echo '# CONFIG_INITRAMFS_FORCE is not set' >> /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.set
rm -rf /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/modules
cmp -s /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.set /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/64_musl/linux-x86_64/linux-5.15.34/.config; cp /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.set /home/matt/openwrt/bu
export MAKEFLAGS= ; [ -d /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/user_headers ] || make -C /home/matt/openwrt/build_dir/ome/matt/openwrt/staging_dir/host/include  -Wall -Wmissing-prototypes -Wstrict-prototypes" CROSS_COMPILE="x86_64-openwrt-linux-musl-" ARCH="x86" KBUILD_HAV/staging_dir/host/lib" KBUILD_HOSTLDLIBS="-L/home/matt/openwrt/staging_dir/host/lib" CONFIG_SHELL="bash" V=''  cmd_syscalls=  KERNELRELEASE=5.15.34 CC="x86
grep '=[ym]' /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.config.set | LC_ALL=C sort | /home/matt/openwrt/staging_dir/host/b
touch /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.configured
rm -f /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/vmlinux /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux
make -C /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34 KCFLAGS="-fmacro-prefix-map=/home/matt/openwrt/build_dir/target-x86_64_mrt-linux-musl-" ARCH="x86" KBUILD_HAVE_NLS=no KBUILD_BUILD_USER="" KBUILD_BUILD_HOST="" KBUILD_BUILD_TIMESTAMP="Tue Apr 19 20:59:50 2022" KBUILD_BUILD_VERScalls=  KERNELRELEASE=5.15.34 CC="x86_64-openwrt-linux-musl-gcc" bzImage modules
make[5]: Entering directory '/home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34'
  CALL    scripts/checksyscalls.sh
  CALL    scripts/atomic/check-atomics.sh
  DESCEND objtool
<stdin>:1:10: fatal error: libelf.h: No such file or directory
compilation terminated.
  CC      /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/arch/x86/special.o
In file included from /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/include/objtool/objtool.h:13,
                 from /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/include/objtool/arch.h:11,
                 from /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/include/objtool/check.h:11,
                 from /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/include/objtool/special.h:10,
                 from arch/x86/special.c:4:
/home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/include/objtool/elf.h:10:10: fatal error: gelf.h: No such file or
   10 | #include <gelf.h>
      |          ^~~~~~~~
compilation terminated.
make[9]: *** [/home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/build/Makefile.build:97: /home/matt/openwrt/build_dir/target
make[8]: *** [/home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/build/Makefile.build:139: arch/x86] Error 2
make[7]: *** [Makefile:56: /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/tools/objtool/objtool-in.o] Error 2
make[6]: *** [Makefile:69: objtool] Error 2
make[5]: *** [Makefile:1371: tools/objtool] Error 2
make[5]: Leaving directory '/home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34'
make[4]: *** [Makefile:23: /home/matt/openwrt/build_dir/target-x86_64_musl/linux-x86_64/linux-5.15.34/.modules] Error 2
make[4]: Leaving directory '/home/matt/openwrt/target/linux/x86'
make[3]: *** [Makefile:11: compile] Error 2
make[3]: Leaving directory '/home/matt/openwrt/target/linux'
time: target/linux/compile#0.89#0.33#1.17
    ERROR: target/linux failed to build.
make[2]: *** [target/Makefile:30: target/linux/compile] Error 1
make[2]: Leaving directory '/home/matt/openwrt'
make[1]: *** [target/Makefile:23: /home/matt/openwrt/staging_dir/target-x86_64_musl/stamp/.target_compile] Error 2
make[1]: Leaving directory '/home/matt/openwrt'
make: *** [/home/matt/openwrt/include/toplevel.mk:230: world] Error 2
2

That would be a missing host (build-)dependency, at least on Debian gelf.h is provided by the libelf-dev package.

3

Thanks @slh that was indeed the problem. I added the libelf-devel package for openSUSE to the build server and kernel 5.15 now compiles without error.

4

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