Overhaul CMake build rules for AMD and UMFPACK.

Avoid manually preprocessing the source files. Some compiler flags can
easily be missed which can lead to compilation issues with the
preprocessed sources (see ElmerCSC#578).

Instead, use object libraries to build the same source files with
different flags.

Potentially fixes the build issues described in ElmerCSC#578.

umfpack/src/amd/CMakeLists.txt

@@ -1,73 +1,30 @@
-INCLUDE_DIRECTORIES(include)
-SET(UMFPACK_AMD_ORIG_SOURCES
-	amd_aat.c
-	amd_1.c
-	amd_2.c
-	amd_dump.c
-	amd_postorder.c
-	amd_post_tree.c
-	amd_defaults.c
-	amd_order.c
-	amd_control.c
-	amd_info.c
-	amd_valid.c
-	amd_preprocess.c
+set(UMFPACK_AMD_SOURCES
+  amd_aat.c
+  amd_1.c
+  amd_2.c
+  amd_dump.c
+  amd_postorder.c
+  amd_post_tree.c
+  amd_defaults.c
+  amd_order.c
+  amd_control.c
+  amd_info.c
+  amd_valid.c
+  amd_preprocess.c
 )
-SET(UMFPACK_AMD_CPP_SOURCES
-	amd_i_aat.c
-	amd_i_1.c
-	amd_i_2.c
-	amd_i_dump.c
-	amd_i_postorder.c
-	amd_i_post_tree.c
-	amd_i_defaults.c
-	amd_i_order.c
-	amd_i_control.c
-	amd_i_info.c
-	amd_i_valid.c
-	amd_i_preprocess.c
-	amd_l_aat.c
-	amd_l_1.c
-	amd_l_2.c
-	amd_l_dump.c
-	amd_l_postorder.c
-	amd_l_post_tree.c
-	amd_l_defaults.c
-	amd_l_order.c
-	amd_l_control.c
-	amd_l_info.c
-	amd_l_valid.c
-	amd_l_preprocess.c
-)
-
-SET(UMFMODIFIER_i_FLAGS -DDINT)
-SET(UMFMODIFIER_l_FLAGS -DDLONG)
-
-SET(UMFPACK_AMD_INCLUDES -I${CMAKE_CURRENT_SOURCE_DIR}/include -I${PROJECT_BINARY_DIR})
-FOREACH(outfileName ${UMFPACK_AMD_CPP_SOURCES})
-  STRING(REGEX REPLACE "^amd_([a-z]*)_.*" "\\1" umfModifier "${outfileName}")
-  STRING(REGEX REPLACE "^amd_${umfModifier}_([a-zA-Z0-9_]*)\\.c" "\\1" stem "${outfileName}")
-  SET(infileName "amd_${stem}.c")
-
-  SET(flags ${UMFMODIFIER_${umfModifier}_FLAGS} -DNBLAS -E)
-
-  ADD_CUSTOM_COMMAND(
-    OUTPUT ${outfileName}
-    COMMAND ${CMAKE_C_COMPILER}
-    ARGS ${UMFPACK_AMD_INCLUDES} ${flags} ${CMAKE_CURRENT_SOURCE_DIR}/${infileName} > ${outfileName}
-    DEPENDS ${infileName}
-  )
-
-ENDFOREACH(outfileName)
-ADD_CUSTOM_TARGET(umfpack_amd_srcs DEPENDS ${UMFPACK_AMD_ORIG_SOURCES})
 
-ADD_LIBRARY(amd STATIC amd_internal.h ${UMFPACK_AMD_CPP_SOURCES})
-ADD_LIBRARY(amdf77 STATIC amd.f amdbar.f)
+add_library(amd_i OBJECT ${UMFPACK_AMD_SOURCES})
+target_include_directories(amd_i PRIVATE include)
+target_compile_definitions(amd_i PRIVATE NBLAS DINT)
 
-INSTALL(TARGETS amd amdf77 DESTINATION ${ELMER_INSTALL_LIB_DIR})
+add_library(amd_l OBJECT ${UMFPACK_AMD_SOURCES})
+target_include_directories(amd_l PRIVATE include)
+target_compile_definitions(amd_l PRIVATE NBLAS DLONG)
 
-IF(WIN32)
-  INSTALL(TARGETS amd amdf77 ARCHIVE DESTINATION ${ELMER_INSTALL_LIB_DIR}
-    RUNTIME DESTINATION ${ELMER_INSTALL_LIB_DIR})
-ENDIF()
+add_library(amd STATIC $<TARGET_OBJECTS:amd_i> $<TARGET_OBJECTS:amd_l>)
+add_library(amdf77 STATIC amd.f amdbar.f)
 
+install(TARGETS amd amdf77
+  ARCHIVE DESTINATION ${ELMER_INSTALL_LIB_DIR}
+  RUNTIME DESTINATION ${ELMER_INSTALL_BIN_DIR}
+  LIBRARY DESTINATION ${ELMER_INSTALL_LIB_DIR})