From 6d08e41ae2fd04c0a7d962b97617cf54c650eda3 Mon Sep 17 00:00:00 2001
From: William Vinnicombe <william.vinnicombe@raspberrypi.com>
Date: Thu, 22 Aug 2024 12:15:46 +0100
Subject: [PATCH] Add find_package compatible install

---
 CMakeLists.txt                  | 27 +++++++++++++++++++++++++++
 cmake/pico-sdk-config.cmake     |  6 ++++++
 cmake/pico_toolchain_file.cmake | 17 +++++++++++++++++
 3 files changed, 50 insertions(+)
 create mode 100644 cmake/pico-sdk-config.cmake
 create mode 100644 cmake/pico_toolchain_file.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ecb515e5..31ddd9636 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,4 +68,31 @@ if (NOT TARGET _pico_sdk_inclusion_marker)
     if (NOT PICO_SDK_TOP_LEVEL_PROJECT)
         pico_promote_common_scope_vars()
     endif()
+
+    if (PICO_SDK_TOP_LEVEL_PROJECT)
+        # Create a ConfigVersion.cmake file
+        include(CMakePackageConfigHelpers)
+        write_basic_package_version_file(
+            ${CMAKE_BINARY_DIR}/pico-sdk-config-version.cmake
+            VERSION ${PICO_SDK_VERSION_STRING}
+            COMPATIBILITY SameMajorVersion
+            ARCH_INDEPENDENT
+        )
+
+        # Temporarily copy that file into source tree
+        install(CODE "file(COPY ${CMAKE_BINARY_DIR}/pico-sdk-config-version.cmake DESTINATION ${CMAKE_CURRENT_LIST_DIR}/cmake/)")
+
+        # Install entire pico-sdk directory
+        get_filename_component(binDir ${CMAKE_BINARY_DIR} NAME)
+        install(DIRECTORY ${CMAKE_CURRENT_LIST_DIR}
+            TYPE LIB
+            PATTERN "${binDir}*" EXCLUDE
+            PATTERN "*.git*" EXCLUDE
+            PATTERN "*.github*" EXCLUDE
+            PATTERN "*.vscode*" EXCLUDE
+            PATTERN "test*" EXCLUDE)
+
+        # Delete temp file
+        install(CODE "file(REMOVE ${CMAKE_CURRENT_LIST_DIR}/cmake/pico-sdk-config-version.cmake)")
+    endif()
 endif()
diff --git a/cmake/pico-sdk-config.cmake b/cmake/pico-sdk-config.cmake
new file mode 100644
index 000000000..5980224cd
--- /dev/null
+++ b/cmake/pico-sdk-config.cmake
@@ -0,0 +1,6 @@
+
+if (DEFINED PICO_SDK_PATH)
+    pico_sdk_init()
+else()
+    message(FATAL_ERROR "Must use the toolchain file at ${CMAKE_CURRENT_LIST_DIR}/pico_toolchain_file.cmake, else pico-sdk project will not build")
+endif()
diff --git a/cmake/pico_toolchain_file.cmake b/cmake/pico_toolchain_file.cmake
new file mode 100644
index 000000000..d5ecd2c18
--- /dev/null
+++ b/cmake/pico_toolchain_file.cmake
@@ -0,0 +1,17 @@
+set(CMAKE_SYSTEM_NAME PICO)
+
+if (NOT DEFINED PICO_PREVIOUS_CMAKE_TOOLCHAIN_FILE)
+    unset(CMAKE_TOOLCHAIN_FILE CACHE)
+else()
+    set(CMAKE_TOOLCHAIN_FILE ${PICO_PREVIOUS_CMAKE_TOOLCHAIN_FILE})
+endif()
+
+if (${PROJECT_NAME} MATCHES "CMAKE_TRY_COMPILE")
+    # Don't log toolchain searches when testing compiler
+    set(CMAKE_MESSAGE_LOG_LEVEL ERROR)
+endif()
+include(${CMAKE_CURRENT_LIST_DIR}/../pico_sdk_init.cmake)
+
+message("Toolchain file now ${CMAKE_TOOLCHAIN_FILE}")
+set(CMAKE_TOOLCHAIN_FILE "${CMAKE_TOOLCHAIN_FILE}" CACHE FILEPATH "")
+include(${CMAKE_TOOLCHAIN_FILE})