sanity check of pkg conf added

Author: robamu

RTEMSConfig.cmake

@@ -40,7 +40,6 @@
 
 function(rtems_general_config TARGET_NAME RTEMS_PREFIX RTEMS_BSP_PAIR)
 
-	message(STATUS ${RTEMS_CONFIG_DIR})
 	if(NOT RTEMS_CONFIG_DIR) 
 		message(STATUS 
 			"RTEMS_CONFIG_DIR not set. Assuming  the CMake support was "

RTEMSGeneric.cmake

@@ -39,8 +39,20 @@ if (${NUM_EXTRA_RTEMS_ARGS} EQUAL 1)
 	set(RTEMS_PATH ${EXTRA_RTEMS_ARGS})
 endif()
 
+if(NOT RTEMS_PREFIX)
+	status(WARNING "No RTEMS prefix supplied!")
+endif()
+
+
 set(RTEMS_PREFIX ${RTEMS_PREFIX} CACHE FILEPATH "RTEMS prefix")
+get_filename_component(RTEMS_PREFIX "${RTEMS_PREFIX}" ABSOLUTE)
+set(RTEMS_PREFIX_ABS ${RTEMS_PREFIX} CACHE FILEPATH 
+	"RTEMS prefix (absolute path)"
+)
+	
 set(RTEMS_BSP ${RTEMS_BSP} CACHE STRING "RTEMS BSP pair")
+
+
 option(RTEMS_VERBOSE "Verbose output for the RTEMS CMake support" FALSE)
 
 set(RTEMS_INSTALL 

RTEMSHardware.cmake

@@ -53,7 +53,22 @@ if(${RTEMS_SCAN_PKG_CONFIG})
 	set(ENV{PKG_CONFIG_PATH} "$ENV{PKG_CONFIG_PATH}:${RTEMS_PKG_FILE_PATH}")
 	pkg_check_modules(RTEMS_BSP_CONFIG "${RTEMS_PKG_MODULE_NAME}")
 
+	pkg_get_variable(RTEMS_BSP_CONFIG_PREFIX 
+		"${RTEMS_PKG_MODULE_NAME}" "prefix"
+	)
+	if(NOT "${RTEMS_BSP_CONFIG_PREFIX}" MATCHES "${RTEMS_PREFIX_ABS}")
+		message(WARNING 
+			"Specified RTEMS prefix and prefix read from "
+			"pkgconfig are different!"
+		)
+		message(WARNING 
+			"Consider adapting the pkg-config file manually if "
+			"the toolchain has moved and the build fails."
+		)
+	endif()
+	
 	if(${RTEMS_VERBOSE})
+		message(STATUS "PKG prefix: ${RTEMS_BSP_CONFIG_PREFIX}")
 		message(STATUS "PKG configuration file found: ${RTEMS_BSP_CONFIG_FOUND}")
 		message(STATUS "Libraries: ${RTEMS_BSP_CONFIG_LIBRARIES}")
 		message(STATUS "Link libraries: ${_RTEMS_BSP_CONFIGLINK_LIBRARIES}")