force legacy standard for gfortran

[unres.git] / source / unres / src_MIN / CMakeLists.txt

diff --git a/source/unres/src_MIN/CMakeLists.txt b/source/unres/src_MIN/CMakeLists.txt
index ba79e61..37a2683 100644 (file)
--- a/source/unres/src_MIN/CMakeLists.txt
+++ b/source/unres/src_MIN/CMakeLists.txt
@@ -125,10 +125,10 @@ if (Fortran_COMPILER_NAME STREQUAL "ifort")
   set(FFLAGS2 "-w -g -00 ")
   set(FFLAGS3 "-g -w -ipo " )
 elseif (Fortran_COMPILER_NAME STREQUAL "gfortran")
-  set(FFLAGS0 "-O" ) 
-  set(FFLAGS1 "-g -C" ) 
-  set(FFLAGS2 "-g -O0 ")
-  set(FFLAGS3 "-O3" )
+  set(FFLAGS0 "-std=legacy -O " ) 
+  set(FFLAGS1 "-std=legacy -g -C" ) 
+  set(FFLAGS2 "-std=legacy -g -O0 ")
+  set(FFLAGS3 "-std=legacy -O3" )
 endif (Fortran_COMPILER_NAME STREQUAL "ifort")