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-rw-r--r--Modules/ExternalProject.cmake5
1 files changed, 4 insertions, 1 deletions
diff --git a/Modules/ExternalProject.cmake b/Modules/ExternalProject.cmake
index 325fbc3..c3fd3c6 100644
--- a/Modules/ExternalProject.cmake
+++ b/Modules/ExternalProject.cmake
@@ -174,7 +174,10 @@ Create custom targets to build projects in external trees
Install step options are:
``INSTALL_DIR <dir>``
- Installation prefix
+ Installation prefix to be placed in the ``<INSTALL_DIR>`` placeholder.
+ This does not actually configure the external project to install to
+ the given prefix. That must be done by passing appropriate arguments
+ to the external project configuration step, e.g. using ``<INSTALL_DIR>``.
``INSTALL_COMMAND <cmd>...``
Command to drive installation of the external project after it has been
built. This only happens at the *build* time of the calling project.