libdwarf cannot find when using vcpkg, and ibdw has become a rerequisite for libdwarf?

[yhyu13]

ubuntu 20.04 x64

vcpkg.json

{
    "dependencies": [  
        "spdlog",
        "mimalloc",
        "magic-enum",
        "boost",
        "libdwarf"
    ],
    "builtin-baseline": "53bef8994c541b6561884a8395ea35715ece75db"
}

find_package(libdwarf CONFIG REQUIRED)
# Also requires one of: libbfd (gnu binutils), libdwarf, libdw (elfutils)
FetchContent_Declare(
    backward
    GIT_REPOSITORY https://github.com/yhyu13/backward-cpp
    GIT_TAG 51f0700452cf71c57d43c2d028277b24cde32502  # or a version tag, such as v1.6
    GIT_SHALLOW 1 # optional ( --depth=1 )
    SYSTEM          # optional, the Backward include directory will be treated as system directory
)
FetchContent_MakeAvailable(backward)

Cmake output

-- 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: LIBELF_LIBRARY LIBELF_INCLUDE_DIR) 

My main targe could find and link with libdwarf, but it seems backward.cpp cannot?

[yhyu13]

I am not even sure where to to start debugging this problem, any kindly guide on where to start, thanks!

Edit:
ok, I added ``--debug-output ``` to cmake as here https://stackoverflow.com/questions/57999508/verbose-output-for-cmake-command

[yhyu13]

Ok, somehow on my ubuntu, I have to install both these packages to make backward detect libdwarf and libdw

sudo apt-get install libdwarf-dev -y
 sudo apt-get install libdw-dev -y

The vcpkg libwarf does not seems to be added to where cmake find_path can find?

[yhyu13]

Ok, somehow cmake could find the libdwarf installed by vcpkg after installing libdw by sudo apt-get install libdw-dev -y

It seems to me there is problem in the cmake config for backward on finding these libs?

-- Found libdw: /usr/lib/x86_64-linux-gnu/libdw.so  
-- Could NOT find libbfd (missing: LIBBFD_LIBRARY LIBBFD_INCLUDE_DIR) 
-- Found libdwarf: /home/hangyu5/Documents/Gitrepo-My/HLVM-Engine/Engine/Source/Common/cmake-build-debug-cmake28clang16/vcpkg_installed/x64-linux/debug/lib/libdwarf.a

Notice libdw is from system path, and libdwarf is from vcpkg path

[yhyu13]

(maybe final update)

Here is the vcpkg.json that would allow backward in cmake to find both libdw and libdwarf

{
    "dependencies": [  
        "libdwarf",
        "elfutils"
    ],
    "builtin-baseline": "53bef8994c541b6561884a8395ea35715ece75db"
}

And elfutils actually requires some apt prerequisites:

sudo apt-get install flex bison autoconf autopoint -y

My output when configuration:

-- Found libdw: /home/hangyu5/Documents/Gitrepo-My/HLVM-Engine/Engine/Source/Common/cmake-build-debug-cmake28clang16/vcpkg_installed/x64-linux/debug/lib/libdw.a  
-- Could NOT find libbfd (missing: LIBBFD_LIBRARY LIBBFD_INCLUDE_DIR) 
-- Found libdwarf: /home/hangyu5/Documents/Gitrepo-My/HLVM-Engine/Engine/Source/Common/cmake-build-debug-cmake28clang16/vcpkg_installed/x64-linux/debug/lib/libdwarf.a  
-- Found Backward: $<BUILD_INTERFACE:/home/hangyu5/Documents/Gitrepo-My/HLVM-Engine/Engine/Source/Common/cmake-build-debug-cmake28clang16/_deps/backward-src>;$<INSTALL_INTERFACE:include> 

notice both libdw and libdwarf comes from vcpkg installed location. (Certainly you need to remove previous apt install llibdw dev and libdwarf dev)

[yhyu13]

I will keep this issue open as libdw has become a rerequisite for libdwarf? It is a must?