1 files changed, 7 insertions, 0 deletions
diff --git a/fortran.sh b/fortran.sh
index 38546b7..f8e2191 100644
--- a/fortran.sh
+++ b/fortran.sh
@@ -1,5 +1,12 @@
 #! /bin/sh
 
+if [[ "${F77}" = "none" && "${F90}" = "none" ]]; then
+    echo 'BEGIN ERROR'
+    echo "Fortran thorn requires that a Fortran compiler is defined, but F77 = '$F77' and F90 = '$F90'.  Aborting."
+    echo 'END ERROR'
+    exit 1
+fi
+
 # Try to use ## for token concatenation.
 # If this works, we likely have an ANSI cpp.