Fixing PETSC detection on ubuntu

CMakeLists.txt

@@ -46,6 +46,12 @@ endif()
 
 find_package(Boost 1.68.0 COMPONENTS unit_test_framework iostreams program_options)
 find_package(MPI)
+
+if (MPI_FOUND)
+	set(ENV{CXX} mpic++)
+	set(ENV{CC} mpicc}
+endif()
+
 find_package(PETSc)
 find_package(HDF5)
 find_package(Eigen3)

configure

@@ -532,9 +532,9 @@ fi
 cd build
 
 ## remove enerything
-echo "Calling cmake ../. $conf_options"
+echo "Calling CXX=mpic++ CC=mpicc cmake ../. $conf_options"
 rm ../error_code
-cmake ../. $conf_options
+CXX=mpic++ CC=mpicc cmake ../. $conf_options
 if [ $? != 0 ]; then
 	#ok something went wrong the install script analyze the return code to potentially fix the problem automatically
 	# Read the error code and exit with that