[vcpkg] Halide builds but CMake imports fail

[kwsp]

I'm using VCPKG to build Halide. It builds correctly and outputs the following usage

[cmake] The package halide provides CMake targets:
[cmake] 
[cmake]     set(CMAKE_CXX_STANDARD 17)
[cmake]     set(CMAKE_CXX_STANDARD_REQUIRED YES)
[cmake]     set(CMAKE_CXX_EXTENSIONS NO)
[cmake] 
[cmake]     find_package(Halide REQUIRED)
[cmake] 
[cmake]     # JIT mode:
[cmake]     add_executable(my_halide_app main.cpp)
[cmake]     target_link_libraries(my_halide_app PRIVATE Halide::Halide)
[cmake] 
[cmake]     # AOT mode:
[cmake]     add_executable(my_generators my_generators.cpp)
[cmake]     target_link_libraries(my_generators PRIVATE Halide::Generator)
[cmake]     add_halide_library(my_first_generator FROM my_generators)
[cmake]     add_halide_library(my_second_generator FROM my_generators
[cmake]         PARAMS parallel=false scale=3.0 rotation=ccw output.type=uint16)
[cmake]     add_halide_library(my_second_generator_2 FROM my_generators
[cmake]         GENERATOR my_second_generator
[cmake]         PARAMS scale=9.0 rotation=ccw output.type=float32)
[cmake]     add_halide_library(my_second_generator_3 FROM my_generators
[cmake]         GENERATOR my_second_generator
[cmake]         PARAMS parallel=false output.type=float64)
[cmake] 
[cmake] For more information see:
[cmake]     https://github.com/halide/Halide/blob//README_cmake.md

However, the next part of CMake configure fails

[cmake] -- Running vcpkg install - done
[cmake] CMake Error at build/clang/vcpkg_installed/arm64-osx/share/HalideHelpers/Halide-Interfaces.cmake:127 (message):
[cmake]   The imported target "Halide::Adams2019" references the file
[cmake] 
[cmake]      "/Users/tnie/code/cpp/HalideTutorial/build/clang/vcpkg_installed/arm64-osx/tools/halide/libautoschedule_adams2019.so"
[cmake] 
[cmake]   but this file does not exist.  Possible reasons include:
[cmake] 
[cmake]   * The file was deleted, renamed, or moved to another location.
[cmake] 
[cmake]   * An install or uninstall procedure did not complete successfully.
[cmake] 
[cmake]   * The installation package was faulty and contained
[cmake] 
[cmake]      "/Users/tnie/code/cpp/HalideTutorial/build/clang/vcpkg_installed/arm64-osx/share/HalideHelpers/Halide-Interfaces.cmake"
[cmake] 
[cmake]   but not all the files it references.
[cmake] 
[cmake] Call Stack (most recent call first):
[cmake]   build/clang/vcpkg_installed/arm64-osx/share/HalideHelpers/HalideHelpersConfig.cmake:5 (include)
[cmake]   /Users/tnie/vcpkg/scripts/buildsystems/vcpkg.cmake:859 (_find_package)
[cmake]   /opt/homebrew/Cellar/cmake/3.30.0/share/cmake/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
[cmake]   build/clang/vcpkg_installed/arm64-osx/share/halide/HalideConfig.cmake:59 (find_dependency)
[cmake]   /Users/tnie/vcpkg/scripts/buildsystems/vcpkg.cmake:859 (_find_package)
[cmake]   src/CMakeLists.txt:6 (find_package)
[cmake] 

Looks like Halide's CMake script is trying to find the dynamic libraries

build/clang/vcpkg_installed/arm64-osx/tools/halide/libautoschedule_adams2019.so

but they are actually here:

~ fd -I libautoschedule_adams2019.so
clang/vcpkg_installed/arm64-osx/bin/libautoschedule_adams2019.so
clang/vcpkg_installed/arm64-osx/debug/bin/libautoschedule_adams2019.so

This is not just a problem with the version of Halide port currently in the VCPKG repo (v17.0.1), since I created my own VCPKG port of Halide by bundling the prebuilt v18.0.0 binaries and got the same error on mac.

The same repo builds on Windows. I wonder if CMake on mac handles paths differently.

Repo to reproduce failure on mac but success on Windows: https://github.com/kwsp/HalideTutorial
By default this uses the Halide port in VCPKG. To try v18.0.0 on mac, change halide to halide-prebuilt in vcpkg.json

[alexreinking]

I wasn't the last person to update the vcpkg port for Halide, unfortunately. Please open an issue with the vcpkg maintainers.

[alexreinking]

@yurybura might be interested in this issue.