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-rw-r--r--Source/cmAddCustomCommandCommand.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/Source/cmAddCustomCommandCommand.h b/Source/cmAddCustomCommandCommand.h
index c67caa5..6c5e1af 100644
--- a/Source/cmAddCustomCommandCommand.h
+++ b/Source/cmAddCustomCommandCommand.h
@@ -152,6 +152,9 @@ public:
"If any dependency is an OUTPUT of another custom command in the "
"same directory (CMakeLists.txt file) CMake automatically brings the "
"other custom command into the target in which this command is built. "
+ "If DEPENDS is not specified the command will run whenever the OUTPUT "
+ "is missing; if the command does not actually create the OUTPUT then "
+ "the rule will always run. "
"If DEPENDS specifies any target (created by an ADD_* command) "
"a target-level dependency is created to make sure the target is "
"built before any target using this custom command. Additionally, "