Not clearing SQL_LIBRARIES so that more libraries can be specified by…

… command line.

CMakeLists.txt

@@ -58,8 +58,7 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -W -Wall")
 # enable use of "make test"
 enable_testing()
 
-# Find SQL libraries
-set(SQL_LIBRARIES "")
+### Find SQL libraries ###
 
 # Find PostgreSQL client library
 
@@ -70,7 +69,7 @@ if(WITH_POSTGRESQL)
   find_package(PostgreSQL)
 
   if(PostgreSQL_FOUND)
-    set(SQL_LIBRARIES ${SQL_LIBRARIES} ${PostgreSQL_LIBRARIES})
+    set(SQL_LIBRARIES ${PostgreSQL_LIBRARIES} ${SQL_LIBRARIES})
     add_definitions(-DHAVE_POSTGRESQL=1)
     message(STATUS "Found PostgreSQL: ${PostgreSQL_LIBRARIES}")
     include_directories(${PostgreSQL_INCLUDE_DIRS})
@@ -93,7 +92,7 @@ if(WITH_MYSQL)
     add_definitions(-DHAVE_MYSQL=1)
     message(STATUS "Found MySQL: ${MYSQL_LIBRARIES}")
     include_directories(${MYSQL_INCLUDE_DIRS})
-    set(SQL_LIBRARIES ${SQL_LIBRARIES} ${MYSQL_LIBRARIES})
+    set(SQL_LIBRARIES ${MYSQL_LIBRARIES} ${SQL_LIBRARIES})
   else()
     set(MYSQL_FOUND FALSE)
     message(STATUS "Could NOT find MySQL library")
@@ -114,7 +113,7 @@ if(SQLITE3_INCLUDE_DIRS AND SQLITE3_LIBRARIES)
   add_definitions(-DHAVE_SQLITE3=1)
   message(STATUS "Found SQLite3: ${SQLITE3_LIBRARIES}")
   include_directories(${SQLITE3_INCLUDE_DIRS})
-  set(SQL_LIBRARIES ${SQL_LIBRARIES} ${SQLITE3_LIBRARIES})
+  set(SQL_LIBRARIES ${SQLITE3_LIBRARIES} ${SQL_LIBRARIES})
 else()
   set(SQLITE3_FOUND FALSE)
   message(SEND_ERROR "Could NOT find SQLite3 library. It is required!")