For 1.1 release we need geos 3.0.0 or later so make sure the user has…

… it.

GEOS 3 is required by PAL, simplify method of QgsGeometry and probably also spatialite.


git-svn-id: http://svn.osgeo.org/qgis/trunk@10562 c8812cc2-4d05-0410-92ff-de0c093fc19c

cmake/FindGEOS.cmake

@@ -53,7 +53,18 @@ ELSE(WIN32)
       )
     #MESSAGE("DBG GEOS_CONFIG ${GEOS_CONFIG}")
 
-    IF (GEOS_CONFIG) 
+    IF (GEOS_CONFIG)
+
+      EXEC_PROGRAM(${GEOS_CONFIG}
+        ARGS --version
+        OUTPUT_VARIABLE GEOS_VERSION)
+      STRING(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\1" GEOS_VERSION_MAJOR "${GEOS_VERSION}")
+      STRING(REGEX REPLACE "([0-9]+)\\.([0-9]+)\\.([0-9]+)" "\\2" GEOS_VERSION_MINOR "${GEOS_VERSION}")
+
+      IF (GEOS_VERSION_MAJOR LESS 3)
+          MESSAGE (FATAL_ERROR "GEOS version is too old (${GEOS_VERSION}). Use 3.0.0 or higher.")
+      ENDIF (GEOS_VERSION_MAJOR LESS 3)
+
       # set INCLUDE_DIR to prefix+include
       EXEC_PROGRAM(${GEOS_CONFIG}
         ARGS --prefix