Port to rapids-cmake.

- Add export sets
- Add install rules
- Remove manual CPM import, port to rapids_cpm_*, etc
- Organize CMake code into cmake/*.cmake files.
- NVBench is now a shared library.

CMakeLists.txt

@@ -1,66 +1,28 @@
-# 3.18.3 is needed for a  MSVC + NVCC + C++17 bugfix.
-cmake_minimum_required(VERSION 3.18.3)
+# 3.20.1 required for rapids-cmake
+cmake_minimum_required(VERSION 3.20.1)
 
-# CXX to work around issues with CUDA-only CMake projects.
-project(NVBench CUDA CXX)
+include(cmake/NVBenchRapidsCMake.cmake)
+nvbench_load_rapids_cmake()
 
-option(NVBench_ENABLE_TESTING "Build NVBench testing suite." OFF)
-option(NVBench_ENABLE_EXAMPLES "Build NVBench examples." OFF)
+project(NVBench
+  LANGUAGES CUDA CXX # CXX to work around issues with CUDA-only CMake projects.
+  VERSION 0.1.0
+)
 
-# Setup some vars for CPM packages:
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/")
+nvbench_init_rapids_cmake()
+
+include(cmake/NVBenchConfigTarget.cmake)
+include(cmake/NVBenchDependencies.cmake)
+include(cmake/NVBenchExports.cmake)
+include(cmake/NVBenchInstallRules.cmake)
+
+message(STATUS "NVBench CUDA architectures: ${CMAKE_CUDA_ARCHITECTURES}")
 
-# NVBench requires C++17.
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CUDA_STANDARD 17)
 
-# TODO this probably should use GNUInstallDirs or something.
-set(NVBench_LIBRARY_OUTPUT_DIR "${CMAKE_BINARY_DIR}/lib")
-set(NVBench_EXECUTABLE_OUTPUT_DIR "${CMAKE_BINARY_DIR}/bin")
-
-include(CPM)
-
-CPMAddPackage(
-  NAME fmt
-  GITHUB_REPOSITORY fmtlib/fmt
-  GIT_TAG 7.1.3
-)
-
-# Following recipe from
-# http://github.com/cpm-cmake/CPM.cmake/blob/master/examples/json/CMakeLists.txt
-# Download the zips because the repo takes an excessively long time to clone.
-CPMAddPackage(
-  NAME nlohmann_json
-
-  # I'm waiting for https://github.com/nlohmann/json/issues/2676 to be fixed,
-  # leave this in to simplify testing patches as they come out. Update the
-  # `nvbench_json` target too when switching branches.
-  # Development version:
-#  VERSION develop
-#  URL https://github.com/nlohmann/json/archive/refs/heads/develop.zip
-#  OPTIONS JSON_MultipleHeaders ON
-
-  # Latest release headers:
-  VERSION 3.9.1
-  URL https://github.com/nlohmann/json/releases/download/v3.9.1/include.zip
-  URL_HASH SHA256=6bea5877b1541d353bd77bdfbdb2696333ae5ed8f9e8cc22df657192218cad91
-  PATCH_COMMAND
-    # Work around compiler bug in nvcc 11.0, see NVIDIA/NVBench#18
-    ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/cmake/patches/nlohmann_json.hpp" "./include/nlohmann/json.hpp"
-)
-
-# Development branch:
-#add_library(nvbench_json INTERFACE)
-#target_link_libraries(nvbench_json INTERFACE nlohmann_json)
-
-# Release headers
-add_library(nvbench_json INTERFACE)
-target_include_directories(nvbench_json SYSTEM INTERFACE
-  "${nlohmann_json_SOURCE_DIR}/include"
-)
-
-# Builds all NVBench targets (libs, tests, examples, etc).
-add_custom_target(nvbench.all)
+option(NVBench_ENABLE_TESTING "Build NVBench testing suite." OFF)
+option(NVBench_ENABLE_EXAMPLES "Build NVBench examples." OFF)
 
 add_subdirectory(nvbench)
 
@@ -75,3 +37,5 @@ endif()
 if (NVBench_ENABLE_TESTING)
   add_subdirectory(testing)
 endif()
+
+nvbench_generate_exports()