marco@marco-pc:~/hadk$ make -j4 hybris-hal
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=8.1.0
TARGET_PRODUCT=lineage_whyred
TARGET_BUILD_VARIANT=userdebug
TARGET_BUILD_TYPE=release
TARGET_ARCH=arm64
TARGET_ARCH_VARIANT=armv8-a
TARGET_CPU_VARIANT=kryo
TARGET_2ND_ARCH=arm
TARGET_2ND_ARCH_VARIANT=armv7-a-neon
TARGET_2ND_CPU_VARIANT=cortex-a53
HOST_ARCH=x86_64
HOST_2ND_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-4.18.0-13-generic-x86_64-with-Ubuntu-18.10-cosmic
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=OPM2.171019.029.B1
OUT_DIR=/home/marco/hadk/out
============================================
ninja: no work to do.
ninja: no work to do.
No need to regenerate ninja file
ninja: error: 'libsf_compat_layer', needed by 'hybris-hal', missing and no known rule to make it
15:05:50 ninja failed with: exit status 1

#### failed to build some targets (10 seconds) ####