make: *** No targets specified and no makefile found. Stop.

[sandip1604]

System: Ubuntu 18.04 LTS

I am trying to build depthai-core on my system and upon running CMake --build build , I am getting the following message:

make: *** No targets specified and no makefile found. Stop.

My output of the cmake -H. -Bbuild is attached below

-- The CXX compiler identification is GNU 7.5.0
-- The C compiler identification is GNU 7.5.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Setting build type to 'Debug' as none was specified.
-- Found Git: /usr/bin/git (found version "2.17.1") 
-- [hunter] Calculating Toolchain-SHA1
-- [hunter] Calculating Config-SHA1
-- [hunter] HUNTER_ROOT: /home/sandip/.hunter
-- [hunter] [ Hunter-ID: 062a19a | Toolchain-ID: 8671a89 | Config-ID: 2127330 ]
-- [hunter] NLOHMANN_JSON_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: 3.9.1)
-- [hunter] XLINK_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: luxonis-2021.3-develop)
-- [hunter] BZIP2_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: 1.0.8-p0)
-- [hunter] FP16_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: luxonis-0.0.0)
-- [hunter] LIBARCHIVE-LUXONIS_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: 3.4.2-p2)
-- [hunter] SPDLOG_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: 1.8.2)
-- [hunter] ZLIB_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: 1.2.11-p1)
-- [hunter] BACKWARD_ROOT: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install (ver.: 1.6)
CMake Error at /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install/lib/cmake/ZLIB/ZLIBConfig.cmake:36 (add_library):
  add_library cannot create ALIAS target "ZLIB::ZLIB" because target
  "ZLIB::zlib" is IMPORTED.
Call Stack (most recent call first):
  cmake/depthaiDependencies.cmake:34 (find_package)
  CMakeLists.txt:118 (include)


-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - not found
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE  
-- Could NOT find libdw (missing: LIBDW_LIBRARY LIBDW_INCLUDE_DIR) 
-- Could NOT find libbfd (missing: LIBBFD_LIBRARY LIBBFD_INCLUDE_DIR) 
-- Could NOT find libdwarf (missing: LIBDWARF_LIBRARY LIBDWARF_INCLUDE_DIR LIBELF_LIBRARY LIBELF_INCLUDE_DIR) 
-- Found Backward: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install/lib/backward  
-- Found nlohmann_json: /home/sandip/.hunter/_Base/062a19a/8671a89/2127330/Install/lib/cmake/nlohmann_json/nlohmann_jsonConfig.cmake (found version "3.9.1") 
-- Performing Test FLAG_-Wall
-- Performing Test FLAG_-Wall - Success
-- Performing Test FLAG_-Wextra
-- Performing Test FLAG_-Wextra - Success
-- Performing Test FLAG_-Woverloaded-virtual
-- Performing Test FLAG_-Woverloaded-virtual - Success
-- Performing Test FLAG_-Wformat=2
-- Performing Test FLAG_-Wformat=2 - Success
-- Performing Test FLAG_-Wmisleading-indentation
-- Performing Test FLAG_-Wmisleading-indentation - Success
-- Performing Test FLAG_-Wduplicated-cond
-- Performing Test FLAG_-Wduplicated-cond - Success
-- Performing Test FLAG_-Wduplicated-branches
-- Performing Test FLAG_-Wduplicated-branches - Success
-- Performing Test FLAG_-Wnull-dereference
-- Performing Test FLAG_-Wnull-dereference - Success
-- Performing Test FLAG_-Wdouble-promotion
-- Performing Test FLAG_-Wdouble-promotion - Success
-- Performing Test FLAG_-Wsign-compare
-- Performing Test FLAG_-Wsign-compare - Success
-- Performing Test FLAG_-Wtype-limits
-- Performing Test FLAG_-Wtype-limits - Success
-- Performing Test FLAG_-Werror=self-assign-field
-- Performing Test FLAG_-Werror=self-assign-field - Failed
-- Performing Test FLAG_-Werror=unused-lambda-capture
-- Performing Test FLAG_-Werror=unused-lambda-capture - Failed
-- Performing Test FLAG_-Werror=return-type
-- Performing Test FLAG_-Werror=return-type - Success
-- Performing Test FLAG_-Werror=non-virtual-dtor
-- Performing Test FLAG_-Werror=non-virtual-dtor - Success
-- Performing Test FLAG_-Werror=sign-compare
-- Performing Test FLAG_-Werror=sign-compare - Success
-- Performing Test FLAG_-Werror=reorder
-- Performing Test FLAG_-Werror=reorder - Success
-- Performing Test FLAG_-Werror=switch-enum
-- Performing Test FLAG_-Werror=switch-enum - Success
-- Compiling depthai-core resources in PATCH_ONLY mode
-- Downloading Depthai device side binaries from server...
-- Downloading depthai and patch
-- commit: 99f9c588547e828663bb42e89f816d184d8dcff5
-- depthai-shared between device and host MATCH!. (device: 99f9c588547e828663bb42e89f816d184d8dcff5, host: 99f9c588547e828663bb42e89f816d184d8dcff5
-- Downloading and checking depthai-device-fwp.tar.xz
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-- Downloading depthai bootloader
-- folder: /home/sandip/depthai-core/build/resources
-- maturity: release
-- commit_version_arg: 0.0.15
-- bootloader shared commit: 126f344155346836a6a2d67b0993c161b6b48729
-- depthai-bootloader-shared between device and host MATCH!. (device: 126f344155346836a6a2d67b0993c161b6b48729, host: 126f344155346836a6a2d67b0993c161b6b48729
-- Downloading and checking depthai-bootloader-fwp.tar.xz
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-- LIST OF RESOURCE COMPILED FILES: /home/sandip/depthai-core/build/resources/depthai-device-fwp-2021725697c9b570383b0597951a9d7b162e6182.tar.xz;/home/sandip/depthai-core/build/resources/depthai-bootloader-fwp-0.0.15.tar.xz
-- Check for working incbin assembly directive
-- Check for working incbin assembly directive - works
-- ClangFormat: clang-format not found! Target 'clangformat' not available...
-- OpenCV or required libraries (opencv_core;opencv_imgproc) not found. OpenCV Support disabled
-- BUILD_DATETIME: 2021-10-23 03:19:31 +0000, BUILD_COMMIT: d520c26b9f631c5476f12259c5f7a3f0f25dd0b0, BUILD_COMMIT_DATETIME: 2021-10-21 12:54:34 +0200
-- Configuring incomplete, errors occurred!
See also "/home/sandip/depthai-core/build/CMakeFiles/CMakeOutput.log".
See also "/home/sandip/depthai-core/build/CMakeFiles/CMakeError.log".

[sandip1604]

Here is my CMakeError.lo CMakeError.log g

[themarpe]

Hi @sandip1604

Seems like ZLib dependency uses a CMake feature which is available in version 3.11 or later. Ubuntu 18.04 comes with 3.10.2 by default

Not sure if there is any updates to be made from ZLib / Hunter (package manager) to be made to make this more backward compatible. For quickest workaround, I'd suggest updating CMake on your system, using a good walkthrough (installing to /usr/local/ and updating paths seems to do it). Note, uninstalling CMake on the system might want to uninstall some additional things as well so preferably don't uninstall it

[themarpe]

Added a minimal version CMake test into CI, and resolved the Ubuntu 18.04 issue as well https://github.com/luxonis/depthai-core/pull/237

[themarpe]

@sandip1604 Resolved and merged into latest develop

[sandip1604]

@themarpe I am using the cmake version higher than 3.11 now but it still throws the same error !. I think I read somewhere in the docs that hunter requires 3.4 and above. not sure but could be a conflict.

[themarpe]

@sandip1604 Please double check that:

1. Your new CMake is actually being used (maybe use full path instead of the command name only), and check cmake --version
2. Try compiling latest develop branch which has this issue resolved - should also work with older CMake.
3. Try removing hunter cache: https://github.com/luxonis/depthai-core#hunter (rm -r ~/.hunter)

The same issue shouldn't happen with newer CMake versions, so most likely some environment configuration issue