Added CMake config files.

This will simplify linking against the lib, both from the build-tree and
install-tree from other CMake projects.

CMakes find_package command uses these configs to locate the exported
targets for the library.

* Also changed so that all CMake options for the project are prepended
  with JANSSON_ so that there is no ambiguity when including this as a
  subdirectory in another CMake project.

2 files changed, 28 insertions, 0 deletions

diff --git a/cmake/JanssonConfig.cmake.in b/cmake/JanssonConfig.cmake.in
new file mode 100644
index 0000000..21af0ff
--- /dev/null
+++ b/cmake/JanssonConfig.cmake.in
@@ -0,0 +1,17 @@
+# - Config file for the Libevent package
+# It defines the following variables
+#  LIBEVENT_INCLUDE_DIRS - include directories for FooBar
+#  LIBEVENT_LIBRARIES    - libraries to link against
+
+# Get the path of the current file.
+get_filename_component(JANSSON_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
+
+# Set the include directories.
+set(JANSSON_INCLUDE_DIRS "@JANSSON__INCLUDE_DIRS@")
+
+# Include the project Targets file, this contains definitions for IMPORTED targets.
+include(${JANSSON_CMAKE_DIR}/JanssonTargets.cmake)
+
+# IMPORTED targets from LibeventTargets.cmake
+set(JANSSON_LIBRARIES event event_core event_extras)
+
diff --git a/cmake/JanssonConfigVersion.cmake.in b/cmake/JanssonConfigVersion.cmake.in
new file mode 100644
index 0000000..83b0d74
--- /dev/null
+++ b/cmake/JanssonConfigVersion.cmake.in
@@ -0,0 +1,11 @@
+set(PACKAGE_VERSION "@JANSSON_DISPLAY_VERSION@")
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}")
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if ("${PACKAGE_VERSION}" VERSION_EQUAL "${PACKAGE_FIND_VERSION}")
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()