Packages: Integrate FetchContent and find_package()

Allow FetchContent_MakeAvailable() to try a call to
find_package() first, or redirect a find_package() call to
FetchContent_MakeAvailable(). The user can set variables
to control which of these are allowed or tried by default.

Fixes: #21687

2 files changed, 16 insertions, 0 deletions

diff --git a/Modules/FetchContent/package-config-version.cmake.in b/Modules/FetchContent/package-config-version.cmake.in
new file mode 100644
index 0000000000..7f190944cf
--- /dev/null
+++ b/Modules/FetchContent/package-config-version.cmake.in
@@ -0,0 +1,5 @@
+# Automatically generated by CMake's FetchContent module.
+# Do not edit this file, it will be regenerated every time CMake runs.
+
+# Version not available, assuming it is compatible
+set(PACKAGE_VERSION_COMPATIBLE TRUE)
diff --git a/Modules/FetchContent/package-config.cmake.in b/Modules/FetchContent/package-config.cmake.in
new file mode 100644
index 0000000000..c3b64c907b
--- /dev/null
+++ b/Modules/FetchContent/package-config.cmake.in
@@ -0,0 +1,11 @@
+# Automatically generated by CMake's FetchContent module.
+# Do not edit this file, it will be regenerated every time CMake runs.
+
+# Projects or the dependencies themselves can provide the following files.
+# The files should define any additional commands or variables that the
+# dependency would normally provide but which won't be available globally
+# if the dependency is brought into the build via FetchContent instead.
+# For dependencies that only provide imported targets and no commands,
+# these typically won't be needed.
+include("${CMAKE_CURRENT_LIST_DIR}/@contentNameLower@-extra.cmake" OPTIONAL)
+include("${CMAKE_CURRENT_LIST_DIR}/@contentName@Extra.cmake" OPTIONAL)