#2474: cmake: fix cmake warning with version > 3.12

ci/build_cpp.sh

@@ -172,7 +172,7 @@ cmake -G "${CMAKE_GENERATOR:-Ninja}" \
       -Dvt_tests_num_nodes="${VT_TESTS_NUM_NODES:-}" \
       -Dvt_external_fmt="${VT_EXTERNAL_FMT:-0}" \
       -Dfmt_DIR="${FMT_DIR}" \
-      -DLIBUNWIND_ROOT="${LIBUNWIND_ROOT:-/usr}" \
+      -Dlibunwind_ROOT="${LIBUNWIND_ROOT:-/usr}" \
       -Dvt_no_color_enabled="${VT_NO_COLOR_ENABLED:-0}" \
       -DCMAKE_CXX_STANDARD="${CMAKE_CXX_STANDARD:-17}" \
       -DBUILD_SHARED_LIBS="${BUILD_SHARED_LIBS:-0}" \

cmake-modules/Findlibunwind.cmake

@@ -1,42 +1,42 @@
 
-# Users can pass LIBUNWIND_ROOT, LIBUNWIND_INCLUDE_DIR, and LIBUNWIND_LIBRARY as CMake variables.
-# If LIBUNWIND_ROOT is provided, the INCLUDE_DIR and LIBRARY variables may be omitted.
+# Users can pass libunwind_ROOT, libunwind_INCLUDE_DIR, and libunwind_LIBRARY as CMake variables.
+# If libunwind_ROOT is provided, the INCLUDE_DIR and LIBRARY variables may be omitted.
 #
-# LIBUNWIND_FOUND, LIBUNWIND_INCLUDE_DIRS, and LIBUNWIND_LIBRARIES are outputs
+# libunwind_FOUND, libunwind_INCLUDE_DIRS, and libunwind_LIBRARIES are outputs
 
-if(LIBUNWIND_ROOT)
-    set(LIBUNWIND_INCLUDE_DIR ${LIBUNWIND_INCLUDE_DIR};${LIBUNWIND_ROOT}/include)
-    set(LIBUNWIND_LIBRARY ${LIBUNWIND_LIBRARY};${LIBUNWIND_ROOT}/lib64;${LIBUNWIND_ROOT}/lib)
+if(libunwind_ROOT)
+    set(libunwind_INCLUDE_DIR ${libunwind_INCLUDE_DIR};${libunwind_ROOT}/include)
+    set(libunwind_LIBRARY ${libunwind_LIBRARY};${libunwind_ROOT}/lib64;${libunwind_ROOT}/lib)
 endif()
 
 # First, check only in the hinted paths
-find_path(LIBUNWIND_INCLUDE_DIRS NAMES libunwind.h
+find_path(libunwind_INCLUDE_DIRS NAMES libunwind.h
     DOC "The libunwind include directory"
-    HINTS ${LIBUNWIND_INCLUDE_DIR}
+    HINTS ${libunwind_INCLUDE_DIR}
     NO_DEFAULT_PATH
 )
-find_library(LIBUNWIND_LIBRARIES NAMES unwind
+find_library(libunwind_LIBRARIES NAMES unwind
     DOC "The libunwind library"
-    HINTS ${LIBUNWIND_LIBRARY}
+    HINTS ${libunwind_LIBRARY}
     NO_DEFAULT_PATH
 )
 
 # If that fails, check in CMake's default paths
-find_path(LIBUNWIND_INCLUDE_DIRS NAMES libunwind.h
+find_path(libunwind_INCLUDE_DIRS NAMES libunwind.h
     DOC "The libunwind include directory"
 )
-find_library(LIBUNWIND_LIBRARIES NAMES unwind
+find_library(libunwind_LIBRARIES NAMES unwind
     DOC "The libunwind library"
 )
 
 include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
-FIND_PACKAGE_HANDLE_STANDARD_ARGS(LIBUNWIND
-                                  REQUIRED_VARS LIBUNWIND_LIBRARIES LIBUNWIND_INCLUDE_DIRS)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(libunwind
+                                  REQUIRED_VARS libunwind_LIBRARIES libunwind_INCLUDE_DIRS)
 
-if(LIBUNWIND_FOUND)
+if(libunwind_FOUND)
   if(NOT TARGET libunwind)
     add_library(libunwind UNKNOWN IMPORTED)
-    set_target_properties(libunwind PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${LIBUNWIND_INCLUDE_DIRS}")
-    set_property(TARGET libunwind APPEND PROPERTY IMPORTED_LOCATION "${LIBUNWIND_LIBRARY}")
+    set_target_properties(libunwind PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${libunwind_INCLUDE_DIRS}")
+    set_property(TARGET libunwind APPEND PROPERTY IMPORTED_LOCATION "${libunwind_LIBRARY}")
   endif()
 endif()

cmake/link_vt.cmake

@@ -109,7 +109,7 @@ function(link_target_with_vt)
       endif()
       if (NOT DEFINED APPLE)
         target_link_libraries(
-          ${ARG_TARGET} PUBLIC ${ARG_BUILD_TYPE} ${LIBUNWIND_LIBRARIES}
+          ${ARG_TARGET} PUBLIC ${ARG_BUILD_TYPE} ${libunwind_LIBRARIES}
         )
       endif()
     endif()

cmake/load_libunwind.cmake

@@ -1,11 +1,11 @@
 set(vt_feature_cmake_libunwind "0")
 
-if(NOT DEFINED LIBUNWIND_ROOT)
-    set(LIBUNWIND_ROOT "/usr")
+if(NOT DEFINED libunwind_ROOT)
+    set(libunwind_ROOT "/usr")
 endif()
 
 find_package(libunwind)
 
-if(LIBUNWIND_FOUND)
+if(libunwind_FOUND)
     set(vt_feature_cmake_libunwind "1")
 endif()