minimal example. working?

Author: sbryngelson

CMakeLists.txt

@@ -391,9 +391,10 @@ HANDLE_SOURCES(syscheck OFF)
 #  * FFTW     (optional) Should be linked with an FFTW-like library (fftw/cufftw),
 #             depending on whether OpenACC is enabled and which compiler is
 #             being used.
+#  * LAPACK   (optional) Should be linked with LAPACK.
 
 function(MFC_SETUP_TARGET)
-    cmake_parse_arguments(ARGS "OpenACC;MPI;SILO;HDF5;FFTW" "TARGET" "SOURCES" ${ARGN})
+    cmake_parse_arguments(ARGS "OpenACC;MPI;SILO;HDF5;FFTW;LAPACK" "TARGET" "SOURCES" ${ARGN})
 
     add_executable(${ARGS_TARGET} ${ARGS_SOURCES})
     set(IPO_TARGETS ${ARGS_TARGET})
@@ -461,6 +462,11 @@ function(MFC_SETUP_TARGET)
             endif()
         endif()
 
+        if (ARGS_LAPACK)
+            find_package(LAPACK REQUIRED)
+            target_link_libraries(${a_target} PRIVATE LAPACK::LAPACK)
+        endif()
+
         if (MFC_OpenACC AND ARGS_OpenACC)
             find_package(OpenACC)
 
@@ -552,7 +558,7 @@ endif()
 if (MFC_POST_PROCESS)
     MFC_SETUP_TARGET(TARGET  post_process
                      SOURCES "${post_process_SRCs}"
-                     MPI SILO HDF5 FFTW)
+                     MPI SILO HDF5 FFTW LAPACK)
 
     # -O0 is in response to https://github.com/MFlowCode/MFC-develop/issues/95
     target_compile_options(post_process PRIVATE -O0)

toolchain/cmake/regular/FindLAPACK.cmake

@@ -0,0 +1,70 @@
+# Attempt to find LAPACK (Linear Algebra PACKage)
+# URL:  https://www.netlib.org/lapack/
+# DOCS: https://cmake.org/cmake/help/latest/command/find_library.html
+#       https://cmake.org/cmake/help/latest/module/FindPackageHandleStandardArgs.html
+
+include(FindPackageHandleStandardArgs)
+
+# Special handling for Cray systems which have optimized math libraries
+if (CMAKE_Fortran_COMPILER_ID STREQUAL "Cray")
+    # On Cray systems, LAPACK is typically provided by the cray-libsci package
+    find_library(LAPACK_LIBRARY
+        NAMES sci_cray sci_gnu sci_intel sci_pgi sci
+        NAMES_PER_DIR
+    )
+    set(BLAS_LIBRARY "")  # BLAS is included in the sci library
+else()
+    # Find LAPACK library for other compilers
+    find_library(LAPACK_LIBRARY
+        NAMES         lapack
+        PATH_SUFFIXES lapack
+        NAMES_PER_DIR
+    )
+
+    # Find BLAS library (required by LAPACK)
+    find_library(BLAS_LIBRARY
+        NAMES         blas openblas
+        PATH_SUFFIXES blas
+        NAMES_PER_DIR
+    )
+
+    # Some LAPACK implementations include BLAS
+    if (NOT BLAS_LIBRARY)
+        set(BLAS_LIBRARY "")
+    endif()
+endif()
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(
+    LAPACK
+    REQUIRED_VARS
+        LAPACK_LIBRARY
+)
+
+if (LAPACK_FOUND AND NOT TARGET LAPACK::LAPACK)
+    set(LAPACK_LIBRARIES "${LAPACK_LIBRARY}")
+    if (BLAS_LIBRARY)
+        list(APPEND LAPACK_LIBRARIES "${BLAS_LIBRARY}")
+    endif()
+
+    add_library(LAPACK::LAPACK INTERFACE IMPORTED)
+
+    set_target_properties(LAPACK::LAPACK PROPERTIES
+        INTERFACE_LINK_LIBRARIES "${LAPACK_LIBRARIES}"
+    )
+    
+    # Add math library for linking (commonly needed)
+    if (UNIX AND NOT APPLE)
+        set_property(TARGET LAPACK::LAPACK APPEND PROPERTY
+            INTERFACE_LINK_LIBRARIES "m")
+    endif()
+    
+    # Add compiler-specific libraries
+    if (CMAKE_Fortran_COMPILER_ID STREQUAL "GNU")
+        set_property(TARGET LAPACK::LAPACK APPEND PROPERTY
+            INTERFACE_LINK_LIBRARIES "gfortran")
+    elseif (CMAKE_Fortran_COMPILER_ID STREQUAL "NVHPC" OR CMAKE_Fortran_COMPILER_ID STREQUAL "PGI")
+        # NVHPC/PGI may need additional libraries
+        set_property(TARGET LAPACK::LAPACK APPEND PROPERTY
+            INTERFACE_LINK_LIBRARIES "pgf90rtl")
+    endif()
+endif() 

toolchain/dependencies/CMakeLists.txt

@@ -21,6 +21,7 @@ include(ExternalProject)
 option(MFC_FFTW    "Build the FFTW3 dependency" OFF)
 option(MFC_HDF5    "Build the HDF5  dependency" OFF)
 option(MFC_SILO    "Build the SILO  dependency" OFF)
+option(MFC_LAPACK  "Build the LAPACK dependency" OFF)
 option(MFC_HIPFORT "Build the HIPFORT dependency" OFF)
 
 
@@ -98,6 +99,32 @@ if (MFC_SILO)
     endif()
 endif()
 
+# LAPACK
+if (MFC_LAPACK)
+    find_package(LAPACK QUIET)
+    if (LAPACK_FOUND)
+        message(STATUS "LAPACK found.")
+        add_custom_target(lapack)
+    else()
+        # Use reference LAPACK from netlib
+        find_package(Git REQUIRED)
+        
+        ExternalProject_Add(lapack
+            GIT_REPOSITORY "https://github.com/Reference-LAPACK/lapack"
+            GIT_TAG        v3.12.0
+            GIT_SHALLOW    ON
+            GIT_PROGRESS   ON
+            CMAKE_ARGS     -DBUILD_SHARED_LIBS=OFF
+                           -DBUILD_TESTING=OFF
+                           -DCBLAS=OFF
+                           -DLAPACKE=OFF
+                           -DBUILD_DEPRECATED=OFF
+                           "-DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}"
+                           "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+        )
+    endif()
+endif()
+
 # HIPFORT
 if (MFC_HIPFORT)
     if (CMAKE_Fortran_COMPILER_ID STREQUAL "Cray")

toolchain/mfc/build.py

@@ -184,14 +184,15 @@ def install(self, case: input.MFCInputFile):
 FFTW          = MFCTarget('fftw',          ['-DMFC_FFTW=ON'],          True,  False, False, MFCTarget.Dependencies([], [], []), -1)
 HDF5          = MFCTarget('hdf5',          ['-DMFC_HDF5=ON'],          True,  False, False, MFCTarget.Dependencies([], [], []), -1)
 SILO          = MFCTarget('silo',          ['-DMFC_SILO=ON'],          True,  False, False, MFCTarget.Dependencies([HDF5], [], []), -1)
+LAPACK        = MFCTarget('lapack',        ['-DMFC_LAPACK=ON'],        True,  False, False, MFCTarget.Dependencies([], [], []), -1)
 HIPFORT       = MFCTarget('hipfort',       ['-DMFC_HIPFORT=ON'],       True,  False, False, MFCTarget.Dependencies([], [], []), -1)
 PRE_PROCESS   = MFCTarget('pre_process',   ['-DMFC_PRE_PROCESS=ON'],   False, True,  False, MFCTarget.Dependencies([], [], []), 0)
 SIMULATION    = MFCTarget('simulation',    ['-DMFC_SIMULATION=ON'],    False, True,  False, MFCTarget.Dependencies([], [FFTW], [HIPFORT]), 1)
-POST_PROCESS  = MFCTarget('post_process',  ['-DMFC_POST_PROCESS=ON'],  False, True,  False, MFCTarget.Dependencies([FFTW, HDF5, SILO], [], []), 2)
+POST_PROCESS  = MFCTarget('post_process',  ['-DMFC_POST_PROCESS=ON'],  False, True,  False, MFCTarget.Dependencies([FFTW, HDF5, SILO, LAPACK], [], []), 2)
 SYSCHECK      = MFCTarget('syscheck',      ['-DMFC_SYSCHECK=ON'],      False, False, True,  MFCTarget.Dependencies([], [], [HIPFORT]), -1)
 DOCUMENTATION = MFCTarget('documentation', ['-DMFC_DOCUMENTATION=ON'], False, False, False, MFCTarget.Dependencies([], [], []), -1)
 
-TARGETS = { FFTW, HDF5, SILO, HIPFORT, PRE_PROCESS, SIMULATION, POST_PROCESS, SYSCHECK, DOCUMENTATION }
+TARGETS = { FFTW, HDF5, SILO, LAPACK, HIPFORT, PRE_PROCESS, SIMULATION, POST_PROCESS, SYSCHECK, DOCUMENTATION }
 
 DEFAULT_TARGETS    = { target for target in TARGETS if target.isDefault }
 REQUIRED_TARGETS   = { target for target in TARGETS if target.isRequired }