From 251dcd2bc5a093186b5d7cea11faec3d7ea235b1 Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Wed, 21 Feb 2024 23:41:16 +0100
Subject: [PATCH] fix missing INTERFACE64 setting for gfortran

---
 cmake/fc.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/cmake/fc.cmake b/cmake/fc.cmake
index 5c30be843..43949917c 100644
--- a/cmake/fc.cmake
+++ b/cmake/fc.cmake
@@ -50,6 +50,9 @@ if (${F_COMPILER} STREQUAL "GFORTRAN" OR ${F_COMPILER} STREQUAL "F95" OR CMAKE_F
       # Don't include -lgfortran, when NO_LAPACK=1 or lsbcc
       set(EXTRALIB "${EXTRALIB} -lgfortran")
     endif ()
+    if (INTERFACE64)
+      set(FCOMMON_OPT "${FCOMMON_OPT} -fdefault-integer-8")
+    endif ()
   endif ()
   if (NO_BINARY_MODE)
     if (MIPS64)