1 files changed, 31 insertions, 0 deletions
diff --git a/Tests/RunCMake/add_custom_target/TargetOrder.cmake b/Tests/RunCMake/add_custom_target/TargetOrder.cmake
new file mode 100644
index 0000000..21669c0
--- /dev/null
+++ b/Tests/RunCMake/add_custom_target/TargetOrder.cmake
@@ -0,0 +1,31 @@
+# Add a target that requires step1 to run first but enforces
+# it only by target-level ordering dependency.
+add_custom_command(
+  OUTPUT step2.txt
+  COMMAND ${CMAKE_COMMAND} -E copy step1.txt step2.txt
+  )
+add_custom_target(step2 DEPENDS step2.txt)
+add_dependencies(step2 step1)
+
+# Add a target that requires step1 and step2 to work,
+# only depends on step1 transitively through step2, but
+# also gets a copy of step2's custom command.
+# The Ninja generator in particular must be careful with
+# this case because it needs to compute the proper set of
+# target ordering dependencies for the step2 custom command
+# even though it appears in both the step2 and step3
+# targets due to dependency propagation.
+add_custom_command(
+  OUTPUT step3.txt
+  COMMAND ${CMAKE_COMMAND} -E copy step1.txt step3-1.txt
+  COMMAND ${CMAKE_COMMAND} -E copy step2.txt step3.txt
+  DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/step2.txt
+  )
+add_custom_target(step3 ALL DEPENDS step3.txt)
+add_dependencies(step3 step2)
+
+# We want this target to always run first.  Add it last so
+# that serial builds require dependencies to order it first.
+add_custom_target(step1
+  COMMAND ${CMAKE_COMMAND} -E touch step1.txt
+  )