Prepare the project for json-glib.

This required writing a special CMake find module.

cmake/FindJsonGlib.cmake

@@ -0,0 +1,58 @@
+# - Find json-glib
+# This module looks for json-glib.
+# This module defines the following values:
+#    JSON_GLIB_FOUND
+#    JSON_GLIB_INCLUDE_DIRS
+#    JSON_GLIB_LIBRARIES
+
+#=============================================================================
+# Copyright Přemysl Janouch 2010
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#     * Redistributions of source code must retain the above copyright
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright
+#       notice, this list of conditions and the following disclaimer in the
+#       documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+# OF SUCH DAMAGE.
+#=============================================================================
+
+find_path (JSON_GLIB_INCLUDE_DIR json-glib/json-glib.h
+	PATH_SUFFIXES json-glib-1.0)
+
+find_path (JSON_GLIB_INCLUDE_DIR_GOBJECT glib-object.h
+	PATH_SUFFIXES glib-2.0)
+
+find_path (JSON_GLIB_INCLUDE_DIR_GLIBCONFIG glibconfig.h
+	PATHS /usr/lib
+	PATH_SUFFIXES glib-2.0/include)
+
+find_library (JSON_GLIB_LIBRARIES json-glib-1.0)
+
+include (FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS (JSON_GLIB DEFAULT_MSG JSON_GLIB_LIBRARIES
+	JSON_GLIB_INCLUDE_DIR JSON_GLIB_INCLUDE_DIR_GOBJECT JSON_GLIB_INCLUDE_DIR_GLIBCONFIG)
+
+set (JSON_GLIB_INCLUDE_DIRS
+	${JSON_GLIB_INCLUDE_DIR}
+	${JSON_GLIB_INCLUDE_DIR_GOBJECT}
+	${JSON_GLIB_INCLUDE_DIR_GLIBCONFIG})
+
+unset (JSON_GLIB_INCLUDE_DIR CACHE)
+unset (JSON_GLIB_INCLUDE_DIR_GOBJECT CACHE)
+unset (JSON_GLIB_INCLUDE_DIR_GLIBCONFIG CACHE)
+mark_as_advanced (JSON_GLIB_LIBRARIES JSON_GLIB_INCLUDE_DIRS)
+