Per #2948, updating script to work with two versions of ecbuild, ecki…

…t, and atlas

internal/scripts/installation/compile_MET_all.sh

@@ -640,7 +640,11 @@ if  [ $COMPILE_ECKIT -eq 1 ]; then
 
   # Need to obtain ecbuild before installing eckit
 
-  vrs="3.7.0"
+  if [[ ${MET_CXX_STANDARD} -le 14 ]]; then
+      vrs="3.5.0"
+  else
+      vrs="3.7.0"
+  fi
 
   echo  
   echo "Compiling ECBUILD at `date`"
@@ -652,9 +656,13 @@ if  [ $COMPILE_ECKIT -eq 1 ]; then
   run_cmd "mkdir build; cd build"
   run_cmd "cmake ../ -DCMAKE_INSTALL_PREFIX=${LIB_DIR} > $(pwd)/ecbuild.cmake.log 2>&1"
   run_cmd "make ${MAKE_ARGS} install > $(pwd)/ecbuild.make_install.log 2>&1"
-
-  vrs="1.24.4"
 
+  if [[ ${MET_CXX_STANDARD} -le 14 ]]; then
+      vrs="1.20.2"
+  else
+      vrs="1.24.4"
+  fi
+
   echo
   echo "Compiling ECKIT at `date`"
   mkdir -p ${LIB_DIR}/eckit
@@ -671,7 +679,11 @@ fi
 # Compile ATLAS
 if [ $COMPILE_ATLAS -eq 1 ]; then
 
-  vrs="0.35.0"
+  if [[ ${MET_CXX_STANDARD} -le 14 ]]; then  
+      vrs="0.30.0"
+  else
+      vrs="0.35.0"
+  fi
 
   echo
   echo "Compiling ATLAS at `date`"