Merge pull request #2 from amoskvin/autodetect-backend-dir

Auto-detect cups backend directory correctly

CMakeLists.txt

@@ -12,19 +12,24 @@ add_definitions(-DMINOR_VERSION=\"${MINOR_VERSION}\")
 add_definitions(-DPATCH_VERSION=\"${PATCH_VERSION}\")
 add_definitions(-DFULL_VERSION=\"${FULL_VERSION}\")
 
+find_program(CUPS_CONFIG_EXECUTABLE NAMES cups-config)
+if (CUPS_CONFIG_EXECUTABLE)
+    exec_program(${CUPS_CONFIG_EXECUTABLE} ARGS --serverbin OUTPUT_VARIABLE CUPS_SERVERBIN)
+    set(DEF_CUPS_BACKEND_DIR "${CUPS_SERVERBIN}/backend")
+else(CUPS_CONFIG_EXECUTABLE)
+    message(FATAL_ERROR "Can't find cups-config. Are CUPS development packages installed?")
+endif(CUPS_CONFIG_EXECUTABLE)
 
 # Linux ***************************************
 if (${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
 
-  set(DEF_CUPS_BACKEND_DIR /usr/lib/cups/backend)
   set(DEF_CUPS_PPD_DIR /usr/share/ppd/boomaga)
   set(DEF_DBUS_MACINE_ID_DIR /var/lib/dbus)
   set(DEF_DBUS_SERVICE_DIR ${CMAKE_INSTALL_PREFIX}/share/dbus-1/services)
 
 # FreeBSD *************************************
 elseif(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
 
-  set(DEF_CUPS_BACKEND_DIR /usr/local/libexec/cups/backend)
   set(DEF_CUPS_PPD_DIR /usr/local/share/cups/model)
   set(DEF_DBUS_MACINE_ID_DIR /var/db/dbus)
   set(DEF_DBUS_SERVICE_DIR ${CMAKE_INSTALL_PREFIX}/share/dbus-1/services)
@@ -81,10 +86,9 @@ install(FILES boomaga.1.gz  DESTINATION share/man/man1)
 message(STATUS "*****************************************************")
 message(STATUS "* boomaga ver. ${FULL_VERSION}")
 message(STATUS "*")
-message(STATUS "* You can change next directories using cmake options like.")
-message(STATUS "*   cmake -DCUPS_BACKEND_DIR=your_path")
+message(STATUS "* You can change the following directories using cmake options like:")
+message(STATUS "*   cmake -DCUPS_PPD_DIR=your_path")
 message(STATUS "*")
-message(STATUS "* CUPS_BACKEND_DIR   = ${CUPS_BACKEND_DIR}")
 message(STATUS "* CUPS_PPD_DIR       = ${CUPS_PPD_DIR}")
 message(STATUS "* DBUS_MACINE_ID_DIR = ${DBUS_MACINE_ID_DIR}")
 message(STATUS "* DBUS_SERVICE_DIR   = ${DBUS_SERVICE_DIR}")