Merge pull request ceph#12008 from linuxbox2/civet-copy-target

cmake: produce civetweb.h, again

ok, w/upstream acks, merging--jenkins build did succeed (this is a build-only change)

src/rgw/CMakeLists.txt

@@ -17,6 +17,13 @@ install(TARGETS
   DESTINATION bin)
 endif(WITH_TESTS)
 
+add_custom_target(civetweb_h
+  COMMAND ${CMAKE_COMMAND} -E make_directory
+  "${CMAKE_BINARY_DIR}/src/include/civetweb"
+  COMMAND ${CMAKE_COMMAND} -E copy_if_different
+  "${CMAKE_SOURCE_DIR}/src/civetweb/include/civetweb.h"
+  "${CMAKE_BINARY_DIR}/src/include/civetweb"
+  COMMENT "keep civetweb.h up-to-date")
 
 set(rgw_a_srcs
   rgw_acl.cc
@@ -96,16 +103,12 @@ set(rgw_a_srcs
 
 add_library(rgw_a STATIC ${rgw_a_srcs})
 
+add_dependencies(rgw_a civetweb_h)
+
 target_include_directories(rgw_a PUBLIC
   "../Beast/include"
   ${FCGI_INCLUDE_DIR})
 
-# we want to include civetweb.h as "civetweb/civetweb.h".  Make it so.
-file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/src/include/civetweb")
-file(COPY
-  "${CMAKE_SOURCE_DIR}/src/civetweb/include/civetweb.h"
-  DESTINATION "${CMAKE_BINARY_DIR}/src/include/civetweb")
-
 target_link_libraries(rgw_a librados cls_lock_client cls_rgw_client cls_refcount_client
   cls_log_client cls_statelog_client cls_timeindex_client cls_version_client
   cls_replica_log_client cls_user_client common common_utf8 global