openssl-sys doesn't automatically detect openssl after installing via vcpkg on Windows

[eureka-cpu]

Hello, I'm not very familiar with development on Windows, and I'm trying to build a project that requires openssl-sys. I've installed openssl via vcpkg as described in the docs, but I'm getting this error. It's likely this is not a bug but rather the docs are a tad incomplete in getting the automatic detection route working. I've also tried installing the package manually and assigning the path with the OPENSSL_DIR environment variable, but openssl-sys claims that the lib directory given is insufficient. I've uninstalled that, but I'm happy to re-install and paste the error if that's the correct way to go about it. Any help is appreciated.

   Compiling openssl-sys v0.9.96
error: failed to run custom build command for `openssl-sys v0.9.96`

Caused by:
  process didn't exit successfully: `C:\Users\obrch\Code\versatus\target\debug\build\openssl-sys-789dd0cb3f81db9a\build-script-main` (exit code: 101)
  --- stdout
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_LIB_DIR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_LIB_DIR
  OPENSSL_LIB_DIR unset
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_INCLUDE_DIR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_INCLUDE_DIR
  OPENSSL_INCLUDE_DIR unset
  cargo:rerun-if-env-changed=X86_64_PC_WINDOWS_MSVC_OPENSSL_DIR
  X86_64_PC_WINDOWS_MSVC_OPENSSL_DIR unset
  cargo:rerun-if-env-changed=OPENSSL_DIR
  OPENSSL_DIR unset
  note: vcpkg did not find openssl: Could not find library in Vcpkg tree package openssl is not installed for vcpkg triplet x64-windows-static-md

  --- stderr
  thread 'main' panicked at C:\Users\obrch\.cargo\registry\src\index.crates.io-6f17d22bba15001f\openssl-sys-0.9.96\build\find_normal.rs:190:5:


  Could not find directory of OpenSSL installation, and this `-sys` crate cannot
  proceed without this knowledge. If OpenSSL is installed and this crate had
  trouble finding it,  you can set the `OPENSSL_DIR` environment variable for the
  compilation process.

  Make sure you also have the development packages of openssl installed.
  For example, `libssl-dev` on Ubuntu or `openssl-devel` on Fedora.

  If you're in a situation where you think the directory *should* be found
  automatically, please open a bug at https://github.com/sfackler/rust-openssl
  and include information about your system as well as this message.

  $HOST = x86_64-pc-windows-msvc
  $TARGET = x86_64-pc-windows-msvc
  openssl-sys = 0.9.96


  It looks like you're compiling for MSVC but we couldn't detect an OpenSSL
  installation. If there isn't one installed then you can try the rust-openssl
  README for more information about how to download precompiled binaries of
  OpenSSL:

  https://github.com/sfackler/rust-openssl#windows

PS C:\Users\obrch\Code\vcpkg> .\vcpkg install openssl
warning: In the September 2023 release, the default triplet for vcpkg libraries changed from x86-windows to the detected host triplet (x64-windows). For the old behavior, add --triplet x86-windows . To suppress this message, add --triplet x64-windows .
Computing installation plan...
The following packages are already installed:
    openssl:x64-windows -> 3.1.4#1
openssl:x64-windows is already installed
Total install time: 74.2 us
The package openssl is compatible with built-in CMake targets:

    find_package(OpenSSL REQUIRED)
    target_link_libraries(main PRIVATE OpenSSL::SSL OpenSSL::Crypto)

[eureka-cpu]

Also the #windows link just takes me to the GitHub repository, not any Windows specific help doc, it may be outdated as well.

[sfackler]

note: vcpkg did not find openssl: Could not find library in Vcpkg tree package openssl is not installed for vcpkg triplet x64-windows-static-md

openssl-sys looks for the statically linked target by default. See https://docs.rs/vcpkg/latest/vcpkg/#static-vs-dynamic-linking for more information.