Solve compilation issue with NVCC on some PowerPC machines

host-configs/TOTAL/pangea3-gcc8.4.1-openmpi-4.1.2.cmake

@@ -108,4 +108,7 @@ set(ENABLE_PETSC OFF CACHE BOOL "")
 set(ENABLE_HYPRE ON CACHE BOOL "")
 set(ENABLE_HYPRE_DEVICE "CUDA" CACHE BOOL "")
 
+# activate workaround for fmt formatter
+set(ENABLE_FMT_CONST_FORMATTER_WORKAROUND ON CACHE BOOL "")
+
 include( ${CMAKE_CURRENT_LIST_DIR}/../tpls.cmake )

src/cmake/GeosxConfig.cmake

@@ -4,6 +4,7 @@ set( PREPROCESSOR_DEFINES ARRAY_BOUNDS_CHECK
                           CUDA
                           CUDA_NVTOOLSEXT
                           HIP
+			  FMT_CONST_FORMATTER_WORKAROUND
                           FORTRAN_MANGLE_NO_UNDERSCORE
                           FPE
                           HYPRE

src/coreComponents/common/GeosxConfig.hpp.in

@@ -41,6 +41,9 @@
 /// Enables use of HIP (CMake option ENABLE_HIP)
 #cmakedefine GEOS_USE_HIP
 
+/// Workaround for FMT compilation issue on some NVCC/PowerPC machines (CMake option ENABLE_FMT_CONST_FORMATTER_WORKAROUND)
+#cmakedefine GEOS_USE_FMT_CONST_FORMATTER_WORKAROUND
+
 /// Enables use of PVTPackage (CMake option ENABLE_PVTPackage)
 #cmakedefine GEOSX_USE_PVTPackage
 

src/coreComponents/dataRepository/DataContext.hpp

@@ -223,4 +223,26 @@ struct GEOS_FMT_NS::formatter< geos::dataRepository::DataContext > : GEOS_FMT_NS
   }
 };
 
+// The following workaround is needed to fix compilation with NVCC on some PowerPC machines.
+// The issue causes the following assertion error message:
+// "Cannot format an argument. To make type T formattable provide a formatter<T> specialization"
+// The standard definition of the has_const_formatter check of fmt fails due to a compiler bug, see the issue below:
+// https://github.com/fmtlib/fmt/issues/2746
+// The workaround was originally implemented in fmt:
+// https://github.com/fmtlib/fmt/commit/70de324aa801eaf52e94c402d526a3849797c620
+// but later removed:
+// https://github.com/fmtlib/fmt/commit/466e0650ec2d153d255a40ec230eb77d7f1c3334
+// This workaround provides a specialization of the const formatter check for the DataContext object.
+// The formatter is defined within this file, and therefore the check is not needed.
+// The scope of the check override is as small as possible to solve the current issue.
+#ifdef GEOS_USE_FMT_CONST_FORMATTER_WORKAROUND
+template<>
+constexpr auto GEOS_FMT_NS::detail::has_const_formatter< geos::dataRepository::DataContext, GEOS_FMT_NS::format_context >() -> bool
+{
+  return true;
+}
+#endif
+// End of the workaround for fmt compilation issues
+
+
 #endif /* GEOS_DATAREPOSITORY_DATACONTEXT_HPP_ */