Add a comment why we can't load targets multiple times

Xtuden-com · Nov 4, 2019 · 67665eb · 67665eb
1 parent 070c5d5
commit 67665eb
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/cpp/ArrowConfig.cmake.in b/cpp/ArrowConfig.cmake.in
@@ -35,6 +35,8 @@ set(PLASMA_STORE_SERVER "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_BINDIR@/plasma-st
 
 include("${CMAKE_CURRENT_LIST_DIR}/ArrowOptions.cmake")
 
+# Load targets only once. If we load targets multiple times, CMake reports
+# already existent target error.
 if(NOT (TARGET arrow_shared OR TARGET arrow_static))
  include("${CMAKE_CURRENT_LIST_DIR}/ArrowTargets.cmake")
 endif()