Export _JAVA_OPTIONS for all

Makefile

@@ -21,6 +21,14 @@ ROUTER ?= rwroute
 # Make /usr/bin/time only print out wall-clock time in seconds
 export TIME=Wall-clock time (sec): %e
 
+ifdef GITHUB_ACTIONS
+	_JAVA_OPTIONS = "-Xms6g -Xmx6g"
+else
+	# Unless _JAVA_OPTIONS is set, sets the initial and maximum heap size of the JVM to be ~32GB
+	_JAVA_OPTIONS ?= "-Xms32736m -Xmx32736m"
+endif
+export _JAVA_OPTIONS
+
 # Default recipe: route and score all given download-benchmarks
 .PHONY: run-$(ROUTER)
 run-$(ROUTER): score-$(ROUTER)
@@ -75,12 +83,11 @@ distclean: clean
 #### BEGIN ROUTER RECIPES
 
 ## RWROUTE
-# _JAVA_OPTIONS="-Xms32736m -Xmx32736m" sets the initial and maximum heap size of the JVM to be ~32GB
 # /usr/bin/time is used to measure the wall clock time
 # Gradle is used to invoke the PartialRouterPhysNetlist class' main method with arguments
 # $< (%_unrouted.phys) and $@ (%_rwroute.phys), and redirecting all output into %_rwroute.phys.log
 %_rwroute.phys: %_unrouted.phys | compile-java
-	(_JAVA_OPTIONS="-Xms6g -Xmx6g" /usr/bin/time ./gradlew -Dmain=com.xilinx.fpga24_routing_contest.PartialRouterPhysNetlist :run --args='$< $@') 2>&1 > $@.log
+	(/usr/bin/time ./gradlew -Dmain=com.xilinx.fpga24_routing_contest.PartialRouterPhysNetlist :run --args='$< $@') 2>&1 > $@.log
 
 ## NXROUTE-POC
 %_nxroute-poc.phys: %_unrouted.phys xcvu3p.device | nxroute-deps fpga-interchange-schema/interchange/capnp/java.capnp