Merge pull request #2425 from paulromano/cmake-mpi-message

Improve error message when parallel HDF5 is found but MPI not enabled
openmc-dev · Mar 16, 2023 · 691f44f · 691f44f
2 parents e24aa7b + a23a6c5
commit 691f44f
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -156,9 +156,9 @@ endif()
 find_package(HDF5 REQUIRED COMPONENTS C HL)
 if(HDF5_IS_PARALLEL)
   if(NOT OPENMC_USE_MPI)
-    message(FATAL_ERROR "Parallel HDF5 was detected, but the detected compiler,\
-     ${CMAKE_CXX_COMPILER}, does not support MPI. An MPI-capable compiler must \
-     be used with parallel HDF5.")
+    message(FATAL_ERROR "Parallel HDF5 was detected, but MPI was not enabled.\
+      To use parallel HDF5, OpenMC needs to be built with MPI support by passing\
+      -DOPENMC_USE_MPI=ON when calling cmake.")
   endif()
   message(STATUS "Using parallel HDF5")
 endif()