Initial attempt to check if library exists

Modules/CheckLibraryExists.cmake

@@ -0,0 +1,27 @@
+#
+# Check if the function exists.
+#
+# CHECK_LIBRARY_EXISTS - macro which checks if the function exists
+# FUNCTION - the name of the function
+# VARIABLE - variable to store the result
+#
+
+MACRO(CHECK_LIBRARY_EXISTS LIBRARY FUNCTION LOCATION VARIABLE)
+  SET(CHECK_LIBRARY_EXISTS_LIBRARY ${LIBRARY})
+  SET(CHECK_LIBRARY_EXISTS_FUNCTION ${FUNCTION})
+  SET(CHECK_LIBRARY_EXISTS_LOCATION ${LOCATION})
+  SET(CHECK_LIBRARY_EXISTS_VARIABLE ${VARIABLE})
+  SET(CHECK_LIBRARY_EXISTS_SOURCE ${CMAKE_ROOT}/Modules/CheckFunctionExists.c)
+  CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CheckLibraryExists.lists.in
+                 ${PROJECT_BINARY_DIR}/CMakeTmp/CheckLibraryExists/CMakeLists.txt
+                 IMMEDIATE)
+  TRY_COMPILE(${VARIABLE}
+             ${PROJECT_BINARY_DIR}/CMakeTmp/CheckLibraryExists
+             ${PROJECT_BINARY_DIR}/CMakeTmp/CheckLibraryExists
+             CHECK_LIBRARY_EXISTS OUTPUT_VARIABLE OUTPUT)
+  IF(NOT ${VARIABLE})
+    WRITE_FILE(${PROJECT_BINARY_DIR}/CMakeError.log 
+      "Determining if the function ${FUNCTION} exists failed with the following output:\n"
+      "${OUTPUT}\n")
+  ENDIF(NOT ${VARIABLE})
+ENDMACRO(CHECK_LIBRARY_EXISTS)

Modules/CheckLibraryExists.lists.in

@@ -0,0 +1,8 @@
+PROJECT(CHECK_LIBRARY_EXISTS)
+
+
+ADD_DEFINITIONS(-DCHECK_FUNCTION_EXISTS=${CHECK_LIBRARY_EXISTS_FUNCTION})
+LINK_DIRECTORIES(${CHECK_LIBRARY_EXISTS_LOCATION})
+ADD_EXECUTABLE(CheckLibraryExists ${CHECK_LIBRARY_EXISTS_SOURCE})
+TARGET_LINK_LIBRARIES(CheckLibraryExists ${CHECK_LIBRARY_EXISTS_LIBRARY})
+