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-rw-r--r--Source/cmConfigureFileCommand.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/Source/cmConfigureFileCommand.h b/Source/cmConfigureFileCommand.h
index 58ce10a..da93ec9 100644
--- a/Source/cmConfigureFileCommand.h
+++ b/Source/cmConfigureFileCommand.h
@@ -66,8 +66,11 @@ public:
"values referenced in the file content. "
"If <input> is a relative path it is evaluated with respect to "
"the current source directory. "
+ "The <input> must be a file, not a directory. "
"If <output> is a relative path it is evaluated with respect to "
"the current binary directory. "
+ "If <output> names an existing directory the input file is placed "
+ "in that directory with its original name. "
"\n"
"This command replaces any variables in the input file referenced as "
"${VAR} or @VAR@ with their values as determined by CMake. If a "