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Enable backend selection independently of compiler #179

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Enable backend selection independently of compiler #179

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2380496
Add option to select backend implementation
pbartholomew08 May 5, 2025
9e90ef5
Add compiler-specific backend options
pbartholomew08 May 5, 2025
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3 changes: 3 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -7,3 +7,6 @@ set(WITH_2DECOMPFFT ON CACHE BOOL

add_subdirectory(src)
add_subdirectory(tests)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
include(SelectBackend)
25 changes: 25 additions & 0 deletions cmake/SelectBackend.cmake
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@@ -0,0 +1,25 @@
# Defines the backend selection for x3d2.
#
# Currently available backends
# - GPU/CUDAFortran (nvfort only)
# - CPU/OMP (all)

set(X3D2_BACKEND_OPTIONS "OMP/CPU")
if (${CMAKE_Fortran_COMPILER_ID} STREQUAL "PGI" OR
${CMAKE_Fortran_COMPILER_ID} STREQUAL "NVHPC")
set(X3D2_BACKEND_DEFAULT "CUDA/GPU")
list(APPEND X3D2_BACKEND_OPTIONS ${X3D2_BACKEND_DEFAULT})
else()
set(X3D2_BACKEND_DEFAULT "OMP/CPU")
endif()

set(X3D2_BACKEND
${X3D2_BACKEND_DEFAULT}
CACHE
STRING
"Select the backend. Current options are ${X3D2_BACKEND_OPTIONS}")
set_property(CACHE
X3D2_BACKEND
PROPERTY STRINGS
${X3D2_BACKEND_OPTIONS})
message(STATUS "Using ${X3D2_BACKEND} backend")