Use - instead of to allow that SITE is not set.

tools/modelsim/set_modelsim

@@ -32,10 +32,10 @@
 export TOOLSET=${1:-}
 echo "Make Modelsim and Altera library simulation settings for RadioHDL with :"
 echo "  - Tool setting: ${TOOLSET}"
-echo "  - Site setting: ${SITE}"
+echo "  - Site setting: ${SITE-}"
 
 # Select tool version
-if [ "${SITE}" = "USN" ]; then
+if [ "${SITE-}" = "USN" ]; then
   if [ "${TOOLSET}" = "unb1" ]; then
     . ${RADIOHDL}/tools/quartus/quartus_version.sh 11.1sp2
     . ${RADIOHDL}/tools/modelsim/modelsim_version.sh 6.6d
@@ -58,8 +58,8 @@ else  # default site
   else
     echo "error: unknown tool setting: ${TOOLSET} (choose 'unb1' or 'unb2')"
     exit 1
-  fi # "${TOOLSET}" 
-fi # "${SITE}"
+  fi
+fi
 
 
 

tools/quartus/set_quartus

@@ -32,10 +32,10 @@
 TOOLSET=${1:-}
 echo "Make Quartus settings for RadioHDL with :"
 echo "  - Tool setting: ${TOOLSET}"
-echo "  - Site setting: ${SITE}"
+echo "  - Site setting: ${SITE-}"
 
 # Select tool version
-if [ "${SITE}" = "USN" ]; then
+if [ "${SITE-}" = "USN" ]; then
   if [ "${TOOLSET}" = "unb1" ]; then
     . ${RADIOHDL}/tools/quartus/quartus_version.sh 11.1sp2
   elif [ "${TOOLSET}" = "unb2" ]; then
@@ -53,7 +53,7 @@ else # default site
     echo "error: unknown tool setting: ${TOOLSET} (choose 'unb1' or 'unb2')"
     exit 1
   fi
-fi # "${SITE}"
+fi
 
 # Tool settings
 . ${RADIOHDL}/tools/quartus/quartus_generic.sh