1 files changed, 50 insertions, 0 deletions
diff --git a/Modules/CheckFortranFunctionExists.cmake b/Modules/CheckFortranFunctionExists.cmake
new file mode 100644
index 0000000..4106a06
--- /dev/null
+++ b/Modules/CheckFortranFunctionExists.cmake
@@ -0,0 +1,50 @@
+# - Check if the Fortran function exists.
+# CHECK_FORTRAN_FUNCTION_EXISTS(FUNCTION VARIABLE)
+# - macro which checks if the Fortran function exists
+#  FUNCTION - the name of the Fortran function
+#  VARIABLE - variable to store the result
+#
+# The following variables may be set before calling this macro to
+# modify the way the check is run:
+#
+#  CMAKE_REQUIRED_LIBRARIES = list of libraries to link
+#
+
+macro(CHECK_FORTRAN_FUNCTION_EXISTS FUNCTION VARIABLE)
+  if(NOT DEFINED ${VARIABLE})
+    message(STATUS "Looking for Fortran ${FUNCTION}")
+    if(CMAKE_REQUIRED_LIBRARIES)
+      set(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES
+        "-DLINK_LIBRARIES:STRING=${CMAKE_REQUIRED_LIBRARIES}")
+    else(CMAKE_REQUIRED_LIBRARIES)
+      set(CHECK_FUNCTION_EXISTS_ADD_LIBRARIES)
+    endif(CMAKE_REQUIRED_LIBRARIES)
+    FILE(WRITE
+    ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompiler.f
+    "
+      program TESTFortran
+      external ${FUNCTION}
+      end
+    "
+    )
+    try_compile(${VARIABLE}
+    ${CMAKE_BINARY_DIR}
+    ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/testFortranCompiler.f
+    CMAKE_FLAGS "${CHECK_FUNCTION_EXISTS_ADD_LIBRARIES}"
+    OUTPUT_VARIABLE OUTPUT
+    )
+    if(${VARIABLE})
+      set(${VARIABLE} 1 CACHE INTERNAL "Have Fortran function ${FUNCTION}")
+      message(STATUS "Looking for Fortran ${FUNCTION} - found")
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log 
+        "Determining if the Fortran ${FUNCTION} exists passed with the following output:\n"
+        "${OUTPUT}\n\n")
+    else(${VARIABLE})
+      message(STATUS "Looking for Fortran ${FUNCTION} - not found")
+      set(${VARIABLE} "" CACHE INTERNAL "Have Fortran function ${FUNCTION}")
+      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log 
+        "Determining if the Fortran ${FUNCTION} exists failed with the following output:\n"
+        "${OUTPUT}\n\n")
+    endif(${VARIABLE})
+  endif(NOT DEFINED ${VARIABLE})
+endmacro(CHECK_FORTRAN_FUNCTION_EXISTS)