twrp

[kamal@kamal ~]$ cd ~/omni
[kamal@kamal omni]$ source build/envsetup.sh
including device/huawei/generic_a15/vendorsetup.sh
[kamal@kamal omni]$ lunch

You're building on Linux

Lunch menu... pick a combo:
     1. aosp_arm-eng
     2. aosp_arm64-eng
     3. aosp_mips-eng
     4. aosp_mips64-eng
     5. aosp_x86-eng
     6. aosp_x86_64-eng
     7. omni_generic_a15-eng

Which would you like? [aosp_arm-eng] 7
WARNING: device/huawei/generic_a15/omni.dependencies file not found

============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=7.1.2
TARGET_PRODUCT=omni_generic_a15
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm64
TARGET_ARCH_VARIANT=armv8-a
TARGET_CPU_VARIANT=generic
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-4.10.13-1-ARCH-x86_64-with-glibc2.2.5
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=NHG47N
OUT_DIR=/home/kamal/omni/out
============================================
[kamal@kamal omni]$ mka recoveryimage
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=7.1.2
TARGET_PRODUCT=omni_generic_a15
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm64
TARGET_ARCH_VARIANT=armv8-a
TARGET_CPU_VARIANT=generic
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-4.10.13-1-ARCH-x86_64-with-glibc2.2.5
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=NHG47N
OUT_DIR=/home/kamal/omni/out
============================================
Using 'prebuilts/ninja/linux-x86/ninja' binary on 'linux-x86'
Running kati to generate build-omni_generic_a15.ninja...
$(shell build/tools/findleaves.py --prune=/home/kamal/omni/out --prune=.repo --prune=.git . Android.mk) was changed, regenerating...
============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=7.1.2
TARGET_PRODUCT=omni_generic_a15
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_BUILD_APPS=
TARGET_ARCH=arm64
TARGET_ARCH_VARIANT=armv8-a
TARGET_CPU_VARIANT=generic
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-4.10.13-1-ARCH-x86_64-with-glibc2.2.5
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=NHG47N
OUT_DIR=/home/kamal/omni/out
============================================
including ./bionic/Android.mk ...
including ./bootable/recovery/Android.mk ...
/bin/bash: line 0: test: -ge: unary operator expected
/bin/bash: line 0: test: -ge: unary operator expected
including ./build/libs/host/Android.mk ...
including ./build/target/board/Android.mk ...
including ./build/target/product/security/Android.mk ...
including ./build/tools/Android.mk ...
including ./device/huawei/generic_a15/Android.mk ...
including ./device/qcom/common/Android.mk ...
including ./device/qcom/sepolicy/Android.mk ...
including ./external/bison/Android.mk ...
including ./external/boringssl/Android.mk ...
including ./external/bouncycastle/Android.mk ...
including ./external/busybox/Android.mk ...
including ./external/clang/Android.mk ...
including ./external/compiler-rt/Android.mk ...
including ./external/conscrypt/Android.mk ...
including ./external/e2fsprogs/Android.mk ...
including ./external/exfat/Android.mk ...
including ./external/f2fs-tools/Android.mk ...
including ./external/fec/Android.mk ...
including ./external/freetype/Android.mk ...
including ./external/fuse/Android.mk ...
including ./external/gptfdisk/Android.mk ...
including ./external/icu/Android.mk ...
including ./external/jemalloc/Android.mk ...
including ./external/libcap/Android.mk ...
including ./external/libcxx/Android.mk ...
including ./external/libcxxabi/Android.mk ...
including ./external/libdrm/Android.mk ...
including ./external/liblzf/Android.mk ...
including ./external/libnl/Android.mk ...
including ./external/libpng/Android.mk ...
including ./external/libselinux/Android.mk ...
including ./external/libunwind/Android.mk ...
including ./external/libunwind_llvm/Android.mk ...
including ./external/llvm/Android.mk ...
including ./external/ltrace/Android.mk ...
including ./external/lz4/Android.mk ...
including ./external/lzma/C/Android.mk ...
including ./external/lzma/Java/Tukaani/Android.mk ...
including ./external/lzma/xz-embedded/Android.mk ...
including ./external/minijail/Android.mk ...
including ./external/mksh/Android.mk ...
including ./external/ntfs-3g/Android.mk ...
including ./external/pcre/Android.mk ...
including ./external/protobuf/Android.mk ...
including ./external/safe-iop/Android.mk ...
including ./external/scrypt/Android.mk ...
including ./external/selinux/Android.mk ...
including ./external/squashfs-tools/Android.mk ...
including ./external/strace/Android.mk ...
including ./external/toybox/Android.mk ...
including ./external/zlib/Android.mk ...
including ./frameworks/native/cmds/atrace/Android.mk ...
including ./frameworks/native/cmds/bugreport/Android.mk ...
including ./frameworks/native/cmds/bugreportz/Android.mk ...
including ./frameworks/native/cmds/cmd/Android.mk ...
including ./frameworks/native/cmds/dumpstate/Android.mk ...
including ./frameworks/native/cmds/dumpsys/Android.mk ...
including ./frameworks/native/cmds/flatland/Android.mk ...
including ./frameworks/native/cmds/installd/Android.mk ...
including ./frameworks/native/cmds/ip-up-vpn/Android.mk ...
including ./frameworks/native/cmds/rawbu/Android.mk ...
including ./frameworks/native/cmds/service/Android.mk ...
including ./frameworks/native/cmds/servicemanager/Android.mk ...
including ./frameworks/native/libs/binder/Android.mk ...
including ./frameworks/native/libs/diskusage/Android.mk ...
including ./frameworks/native/libs/gui/Android.mk ...
including ./frameworks/native/libs/input/Android.mk ...
including ./frameworks/native/libs/ui/Android.mk ...
including ./frameworks/native/opengl/libagl/Android.mk ...
including ./frameworks/native/opengl/libs/Android.mk ...
including ./frameworks/native/opengl/tests/Android.mk ...
including ./frameworks/native/services/batteryservice/Android.mk ...
including ./frameworks/native/services/inputflinger/Android.mk ...
including ./frameworks/native/services/powermanager/Android.mk ...
including ./frameworks/native/services/sensorservice/Android.mk ...
including ./frameworks/native/services/surfaceflinger/Android.mk ...
including ./frameworks/native/vulkan/Android.mk ...
including ./hardware/libhardware/Android.mk ...
including ./hardware/qcom/keymaster/Android.mk ...
including ./libcore/Android.mk ...
including ./libnativehelper/Android.mk ...
including ./prebuilts/clang/host/linux-x86/Android.mk ...
including ./prebuilts/misc/Android.mk ...
including ./prebuilts/ndk/Android.mk ...
including ./prebuilts/sdk/Android.mk ...
including ./system/core/Android.mk ...
including ./system/extras/Android.mk ...
including ./system/gatekeeper/Android.mk ...
including ./system/keymaster/Android.mk ...
including ./system/netd/Android.mk ...
including ./system/security/keystore-engine/Android.mk ...
including ./system/security/keystore/Android.mk ...
including ./system/security/softkeymaster/Android.mk ...
including ./system/sepolicy/Android.mk ...
including ./vendor/omni/Android.mk ...
No private recovery resources for TARGET_DEVICE generic_a15
build/core/tasks/kernel.mk:109: ***************************************************************
build/core/tasks/kernel.mk:110: * Using prebuilt kernel binary instead of source              *
build/core/tasks/kernel.mk:111: * THIS IS DEPRECATED, AND WILL BE DISCONTINUED                *
build/core/tasks/kernel.mk:112: * Please configure your device to download the kernel         *
build/core/tasks/kernel.mk:113: * source repository to kernel/huawei/generic_a15
build/core/tasks/kernel.mk:114: * See http://forum.xda-developers.com/wiki/ROM/Integrated_Kernel_Build
build/core/tasks/kernel.mk:115: * for more information                                        *
build/core/tasks/kernel.mk:116: ***************************************************************
build/core/base_rules.mk:319: warning: overriding commands for target `/home/kamal/omni/out/target/product/generic_a15/root/res/images/charger/battery_fail.png'
build/core/base_rules.mk:319: warning: ignoring old commands for target `/home/kamal/omni/out/target/product/generic_a15/root/res/images/charger/battery_fail.png'
build/core/base_rules.mk:319: warning: overriding commands for target `/home/kamal/omni/out/target/product/generic_a15/root/res/images/charger/battery_scale.png'
build/core/base_rules.mk:319: warning: ignoring old commands for target `/home/kamal/omni/out/target/product/generic_a15/root/res/images/charger/battery_scale.png'
build/core/Makefile:1112: warning: overriding commands for target `/home/kamal/omni/out/target/product/generic_a15/ramdisk-recovery.cpio'
build/core/Makefile:1068: warning: ignoring old commands for target `/home/kamal/omni/out/target/product/generic_a15/ramdisk-recovery.cpio'
build/core/Makefile:1118: warning: overriding commands for target `/home/kamal/omni/out/target/product/generic_a15/ramdisk-recovery.img'
build/core/Makefile:1074: warning: ignoring old commands for target `/home/kamal/omni/out/target/product/generic_a15/ramdisk-recovery.img'
build/core/Makefile:1124: warning: overriding commands for target `/home/kamal/omni/out/target/product/generic_a15/recovery.img'
build/core/Makefile:1079: warning: ignoring old commands for target `/home/kamal/omni/out/target/product/generic_a15/recovery.img'
build/core/tasks/kernel.mk:294: warning: overriding commands for target `/home/kamal/omni/out/target/product/generic_a15/kernel'
build/core/Makefile:34: warning: ignoring old commands for target `/home/kamal/omni/out/target/product/generic_a15/kernel'
Starting build with ninja
ninja: Entering directory `.'
ninja: error: 'device/generic/goldfish/fstab.goldfish', needed by '/home/kamal/omni/out/target/product/generic_a15/root/fstab.goldfish', missing and no known rule to make it
make: *** [build/core/ninja.mk:158: ninja_wrapper] Error 1