From 5582180e31668e76115ad6cdcaba6b38fa0210f6 Mon Sep 17 00:00:00 2001
From: Gavin Ridley <gavin.keith.ridley@gmail.com>
Date: Wed, 5 Oct 2022 17:45:51 -0400
Subject: [PATCH] Can now print build info

---
 CMakeLists.txt          | 13 ++++++++++
 include/openmc/output.h |  3 +++
 src/initialize.cpp      |  4 +++
 src/output.cpp          | 56 +++++++++++++++++++++++++++++++++++++++++
 4 files changed, 76 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 521b46cfc..ad1478de8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -482,6 +482,19 @@ if (OPENMC_USE_MPI)
   target_link_libraries(libopenmc MPI::MPI_CXX)
 endif()
 
+#===============================================================================
+# Log build info that this executable can report later
+#===============================================================================
+target_compile_definitions(libopenmc PRIVATE BUILD_TYPE=${CMAKE_BUILD_TYPE})
+target_compile_definitions(libopenmc PRIVATE COMPILER_ID=${CMAKE_CXX_COMPILER_ID})
+target_compile_definitions(libopenmc PRIVATE COMPILER_VERSION=${CMAKE_CXX_COMPILER_VERSION})
+if (OPENMC_ENABLE_PROFILE)
+    target_compile_definitions(libopenmc PRIVATE PROFILINGBUILD)
+endif()
+if (OPENMC_ENABLE_COVERAGE)
+    target_compile_definitions(libopenmc PRIVATE COVERAGEBUILD)
+endif()
+
 #===============================================================================
 # openmc executable
 #===============================================================================
diff --git a/include/openmc/output.h b/include/openmc/output.h
index 2ebe2711f..cf5b49607 100644
--- a/include/openmc/output.h
+++ b/include/openmc/output.h
@@ -40,6 +40,9 @@ void print_usage();
 //! Display current version and copright/license information
 void print_version();
 
+//! Display compile flags employed, etc
+void print_build_info();
+
 //! Display header listing what physical values will displayed
 void print_columns();
 
diff --git a/src/initialize.cpp b/src/initialize.cpp
index 9c20a1f3c..e2503bc6e 100644
--- a/src/initialize.cpp
+++ b/src/initialize.cpp
@@ -262,6 +262,10 @@ int parse_command_line(int argc, char* argv[])
         print_version();
         return OPENMC_E_UNASSIGNED;
 
+      } else if (arg == "-b" || arg == "--build-info") {
+        print_build_info();
+        return OPENMC_E_UNASSIGNED;
+
       } else if (arg == "-t" || arg == "--track") {
         settings::write_all_tracks = true;
 
diff --git a/src/output.cpp b/src/output.cpp
index 56fea4db9..5daf652dc 100644
--- a/src/output.cpp
+++ b/src/output.cpp
@@ -325,6 +325,7 @@ void print_usage()
       "max_tracks)\n"
       "  -e, --event            Run using event-based parallelism\n"
       "  -v, --version          Show version information\n"
+      "  -b, --build-info       Show compile options\n"
       "  -h, --help             Show this message\n");
   }
 }
@@ -347,6 +348,61 @@ void print_version()
 
 //==============================================================================
 
+void print_build_info()
+{
+  const std::string n("no");
+  const std::string y("yes");
+
+  std::string mpi(n);
+  std::string phdf5(n);
+  std::string dagmc(n);
+  std::string libmesh(n);
+  std::string png(n);
+  std::string profiling(n);
+  std::string coverage(n);
+
+#ifdef PHDF5
+  phdf5 = y;
+#endif
+#ifdef OPENMC_MPI
+  mpi = y;
+#endif
+#ifdef DAGMC
+  dagmc = y;
+#endif
+#ifdef LIBMESH
+  libmesh = y;
+#endif
+#ifdef USE_LIBPNG
+  png = y;
+#endif
+#ifdef PROFILINGBUILD
+  profiling = y;
+#endif
+#ifdef COVERAGEBUILD
+  coverage = y;
+#endif
+
+  // Wraps macro variables in quotes
+#define STRINGIFY(x) STRINGIFY2(x)
+#define STRINGIFY2(x) #x
+
+  if (mpi::master) {
+    fmt::print("Build type:            {}\n", STRINGIFY(BUILD_TYPE));
+    fmt::print("Compiler ID:           {} {}\n", STRINGIFY(COMPILER_ID),
+      STRINGIFY(COMPILER_VERSION));
+    fmt::print("MPI enabled:           {}\n", mpi);
+    fmt::print("Parallel HDF5 enabled: {}\n", phdf5);
+    fmt::print("PNG support:           {}\n", png);
+    fmt::print("DAGMC support:         {}\n", dagmc);
+    fmt::print("libMesh support:       {}\n", libmesh);
+    fmt::print("Coverage testing:      {}\n", coverage);
+    fmt::print("Profiling flags:       {}\n", profiling);
+  }
+}
+
+//==============================================================================
+
 void print_columns()
 {
   if (settings::entropy_on) {