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-rw-r--r--cmake/opentrack-hier.cmake2
1 files changed, 2 insertions, 0 deletions
diff --git a/cmake/opentrack-hier.cmake b/cmake/opentrack-hier.cmake
index 734ba183..2b3159b4 100644
--- a/cmake/opentrack-hier.cmake
+++ b/cmake/opentrack-hier.cmake
@@ -7,6 +7,8 @@
# TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
+include_guard(GLOBAL)
+
set(opentrack-install-rpath "")
if(APPLE)
set(opentrack-hier-pfx ".")