[Creating objdir /syzkaller/managers/main/kernel/obj/syzkaller/managers/main/kernel/amd64.amd64...]
--- kernel-toolchain ---
make[1]: "/syzkaller/managers/main/kernel/Makefile.inc1" line 341: SYSTEM_COMPILER: libclang will be built for bootstrapping a cross-compiler.
make[1]: "/syzkaller/managers/main/kernel/Makefile.inc1" line 346: SYSTEM_LINKER: libclang will be built for bootstrapping a cross-linker.
make[1]: "/syzkaller/managers/main/kernel/Makefile.inc1" line 454: The src.conf WITHOUT_CLEAN option can now be used instead of NO_CLEAN.
make[1]: "/syzkaller/managers/main/kernel/Makefile.inc1" line 2522: Missing dependency operator
make[1]: "/syzkaller/managers/main/kernel/Makefile.inc1" line 2524: if-less endif
make[1]: Fatal errors encountered -- cannot continue
make[1]: stopped in /syzkaller/managers/main/kernel
*** [kernel-toolchain] Error code 1

make: stopped in /syzkaller/managers/main/kernel
1 error

make: stopped in /syzkaller/managers/main/kernel