Corrected MPI detection

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd890b53a6872ddba80ff0d01296af193e1f25a6..237fb4765d731bf93aaca00fcbd76de72dccb559 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -60,9 +60,13 @@ list (APPEND CMAKE_MODULE_PATH "${SOLVERLAB_SOURCE_DIR}/cmake_files")
 #############################
 # Detection of MPI + MPI4PY #
 #############################
-if   ( DEFINED MPI_ROOT_DIR )
-  set(MPI_HOME    ${MPI_ROOT_DIR})
-endif( DEFINED MPI_ROOT_DIR )
+if   ( DEFINED ENV{MPI_ROOT_DIR} OR DEFINED MPI_ROOT_DIR )
+  if   ( DEFINED  ENV{MPI_ROOT_DIR} )
+    set(MPI_HOME $ENV{MPI_ROOT_DIR})
+  else ( DEFINED  ENV{MPI_ROOT_DIR} )
+    set(MPI_HOME    ${MPI_ROOT_DIR})
+  endif( DEFINED  ENV{MPI_ROOT_DIR} )
+endif( DEFINED ENV{MPI_ROOT_DIR} OR DEFINED MPI_ROOT_DIR )
 
 # Definition of SOLVERLAB_WITH_MPI
 if(    DEFINED ENV{MPI_HOME} OR MPI_HOME )