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-rw-r--r--Modules/CheckFortranFunctionExists.cmake2
1 files changed, 2 insertions, 0 deletions
diff --git a/Modules/CheckFortranFunctionExists.cmake b/Modules/CheckFortranFunctionExists.cmake
index 5fc740a..f3ced93 100644
--- a/Modules/CheckFortranFunctionExists.cmake
+++ b/Modules/CheckFortranFunctionExists.cmake
@@ -24,6 +24,8 @@
#
# CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+include_guard(GLOBAL)
+
macro(CHECK_FORTRAN_FUNCTION_EXISTS FUNCTION VARIABLE)
if(NOT DEFINED ${VARIABLE})
message(STATUS "Looking for Fortran ${FUNCTION}")