Merge pull request #41 from INMOST-DEV/petsc-fix

fix for newer PETSc versions compare

cmake_find/FindPETSc.cmake

@@ -26,6 +26,7 @@ set(PETSC_VALID_COMPONENTS
   C
   CXX)
 
+
 if(NOT PETSc_FIND_COMPONENTS)
   set(PETSC_LANGUAGE_BINDINGS "C")
 else()
@@ -269,6 +270,7 @@ show :
     set(_PETSC_TEST_SOURCE "
 static const char help[] = \"PETSc test program.\";
 #include <petscts.h>
+#include <petscsys.h>
 int main(int argc,char *argv[]) {
   PetscErrorCode ierr;
   TS ts;
@@ -292,7 +294,11 @@ int main(int argc,char *argv[]) {
   find_path (PETSC_INCLUDE_DIR petscts.h HINTS "${PETSC_DIR}" PATH_SUFFIXES include NO_DEFAULT_PATH)
   find_path (PETSC_INCLUDE_CONF petscconf.h HINTS "${PETSC_DIR}" PATH_SUFFIXES "${PETSC_ARCH}/include" "bmake/${PETSC_ARCH}" NO_DEFAULT_PATH)
   mark_as_advanced (PETSC_INCLUDE_DIR PETSC_INCLUDE_CONF)
+  if (USE_MPI)
+  	set (petsc_includes_minimal ${PETSC_INCLUDE_CONF} ${PETSC_INCLUDE_DIR} ${MPI_INCLUDE_PATH})
+  else()
   	set (petsc_includes_minimal ${PETSC_INCLUDE_CONF} ${PETSC_INCLUDE_DIR})
+  endif()
 
   #message(STATUS "petsc_includes_minimal")
   #foreach(D ${petsc_includes_minimal})