Suitesparse cmake

Author: Ahdhn

CMakeLists.txt

@@ -8,12 +8,13 @@ project(RXMesh
 set(RX_USE_POLYSCOPE "ON" CACHE BOOL "Enable Ployscope for visualization")
 set(RX_BUILD_TESTS "ON" CACHE BOOL "Build RXMesh unit test")
 set(RX_BUILD_APPS "ON" CACHE BOOL "Build RXMesh applications")
+set(RX_USE_SUITESPARSE "ON" CACHE BOOL "Use SuiteSparse for benchmark")
+
+message(STATUS "Polyscope is ${RX_USE_POLYSCOPE}")
+message(STATUS "Build RXMesh unit test is ${RX_BUILD_TESTS}")
+message(STATUS "Build RXMesh applications is ${RX_BUILD_APPS}")
+message(STATUS "SuiteSparse is ${RX_USE_SUITESPARSE}")
 
-if(${RX_USE_POLYSCOPE})
-	message(STATUS "Polyscope is enabled")
-else()
-	message(STATUS "Polyscope is disabled")
-endif()
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CUDA_STANDARD 17)
@@ -168,6 +169,11 @@ target_compile_options(RXMesh INTERFACE
 include("cmake/metis.cmake")
 target_link_libraries(RXMesh INTERFACE metis)	
 
+#SuiteSparse
+if(${RX_USE_SUITESPARSE})
+	include("cmake/suitesparse.cmake")
+	target_compile_definitions(RXMesh INTERFACE USE_SUITESPARSE)
+endif()
 target_link_libraries(RXMesh INTERFACE glm::glm)
 if(${RX_USE_POLYSCOPE})
 	target_link_libraries(RXMesh INTERFACE polyscope)	

apps/MCF/CMakeLists.txt

@@ -33,5 +33,7 @@ target_link_libraries( MCF
     PRIVATE RXMesh
     PRIVATE gtest_main
 )
-
+if (${RX_USE_SUITESPARSE})  
+  target_link_libraries(MCF PRIVATE SuiteSparse::CHOLMOD)
+endif()
 #gtest_discover_tests( MCF )

cmake/suitesparse.cmake

@@ -0,0 +1,73 @@
+if (${RX_USE_SUITESPARSE})
+  include(FetchContent)
+
+  # ===========================================================
+  # 1.  BLAS  (try system first, else build OpenBLAS)
+  # ===========================================================
+  set(BLA_VENDOR OpenBLAS)
+  find_package(BLAS QUIET COMPONENTS CBLAS)
+
+  if (NOT BLAS_FOUND)
+    message(STATUS "No BLAS on the system – building OpenBLAS")
+
+    FetchContent_Declare(
+      openblas
+      GIT_REPOSITORY https://github.com/xianyi/OpenBLAS.git
+      GIT_TAG        v0.3.27
+    )
+    # We need the LAPACK symbols for SuiteSparse
+    set(BUILD_WITHOUT_LAPACK OFF CACHE BOOL "" FORCE)
+    FetchContent_MakeAvailable(openblas)
+	
+    # 1) Pick the real OpenBLAS target (may be an alias)
+	set(_blas_target "")
+	if(TARGET openblas)
+		# openblas is usually an ALIAS → follow it
+		get_property(_aliased TARGET openblas PROPERTY ALIASED_TARGET)
+		if(_aliased)
+			set(_blas_target ${_aliased})      # real imported library
+		else()
+			set(_blas_target openblas)         # openblas *is* the real one
+		endif()
+	elseif(TARGET OpenBLAS::OpenBLAS)
+		set(_blas_target OpenBLAS::OpenBLAS) # MinGW / some Linux builds
+	else()
+		message(FATAL_ERROR "OpenBLAS was built but exported no usable target")
+	endif()
+
+	# 2)  Provide a canonical BLAS::BLAS, but only once
+	if(NOT TARGET BLAS::BLAS)
+		add_library(BLAS::BLAS ALIAS ${_blas_target})
+	endif()
+
+	# 3) LAPACK shim (SuiteSparse needs it)
+	if(NOT TARGET LAPACK::LAPACK)
+		add_library(LAPACK::LAPACK ALIAS ${_blas_target})
+	endif()
+	
+
+	# 4) Legacy cache variables so FindBLAS/LAPACK are satisfied
+	set(BLAS_LIBRARIES   BLAS::BLAS    CACHE STRING "" FORCE)
+	set(BLAS_FOUND       TRUE              CACHE BOOL   "" FORCE)	
+	set(LAPACK_LIBRARIES LAPACK::LAPACK CACHE STRING "" FORCE)
+	set(LAPACK_FOUND     TRUE              CACHE BOOL   "" FORCE)
+	set(LAPACK_LIBRARIES ${BLAS_LIBRARIES} CACHE STRING "" FORCE)
+	set(LAPACK_FOUND     TRUE              CACHE BOOL   "" FORCE)	
+  endif()
+  
+  # ===========================================================
+  # 3.  Fetch & build SuiteSparse
+  # ===========================================================
+  set(WITH_FORTRAN              OFF CACHE BOOL "" FORCE)
+  set(WITH_CUDA                 ON  CACHE BOOL "" FORCE)
+  set(WITH_PARTITION            ON  CACHE BOOL "" FORCE)
+  set(WITH_DEMOS                OFF CACHE BOOL "" FORCE)
+  set(SuiteSparse_ENABLE_LAPACK ON  CACHE BOOL "" FORCE)
+
+  FetchContent_Declare(
+    suitesparse
+    GIT_REPOSITORY https://github.com/sergiud/SuiteSparse.git
+    GIT_TAG        cmake
+  )
+  FetchContent_MakeAvailable(suitesparse)
+endif()