trying to fix missing petsc libs, second try

CMakeLists.txt

@@ -44,7 +44,7 @@ option(ENABLE_NETGEN "Enable Netgen mesh generator" ON)
 option(ENABLE_OCC "Enable Open CASCADE geometrical models" ON)
 option(ENABLE_OSMESA "Use OSMesa for offscreen rendering" OFF)
 option(ENABLE_PARSER "Build the GEO file parser" ON)
-option(ENABLE_PETSC "Enable PETSc linear algebra solvers" OFF)
+option(ENABLE_PETSC "Enable PETSc linear algebra solvers" ON)
 option(ENABLE_PLUGINS "Build the post-processing plugins" ON)
 option(ENABLE_POST "Build the post-processing module" ON)
 option(ENABLE_QT "Build QT GUI" OFF)
@@ -632,15 +632,20 @@ if(ENABLE_PETSC)
     set(PETSC_LIBS_REQUIRED petscksp petscdm petscmat petscvec petsc)
     find_all_libraries(PETSC_LIBS PETSC_LIBS_REQUIRED 
                        ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib "")
-    # petsc 3.1 create only one library (libpetsc)
+    # petsc 3.1 creates only one library (libpetsc)
     if(NOT PETSC_LIBS)
       find_library(PETSC_LIBS petsc PATHS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/lib)
     endif(NOT PETSC_LIBS)
-    string(REGEX MATCH "PACKAGES_LIBS = [^\n\r]*" PETSC_PACKAGES_LIBS
-           ${PETSC_VARIABLES})
-    string(REPLACE "PACKAGES_LIBS = " "" PETSC_PACKAGES_LIBS
-           ${PETSC_PACKAGES_LIBS})
-    list(APPEND EXTERNAL_LIBRARIES ${PETSC_LIBS} "${PETSC_PACKAGES_LIBS}")
+    list(APPEND EXTERNAL_LIBRARIES ${PETSC_LIBS})
+    # find additional libraries to link with
+    string(REGEX MATCH "PACKAGES_LIBS = [^\n\r]*" PLIBS ${PETSC_VARIABLES})
+    string(REPLACE "PACKAGES_LIBS = " "" PLIBS ${PLIBS})
+    string(STRIP ${PLIBS} PLIBS)
+    list(APPEND EXTERNAL_LIBRARIES "${PLIBS}")
+    string(REGEX MATCH "PCC_LINKER_LIBS = [^\n\r]*" LLIBS ${PETSC_VARIABLES})
+    string(REPLACE "PCC_LINKER_LIBS = " "" LLIBS ${LLIBS})
+    string(STRIP ${LLIBS} LLIBS)
+    list(APPEND EXTERNAL_LIBRARIES "${LLIBS}")
   endif(EXISTS ${ENV_PETSC_DIR}/${ENV_PETSC_ARCH}/conf/petscvariables)
 endif(ENABLE_PETSC)