+JAVA_HOME=/usr/lib/jvm/default-java
+SYSTEM= $(shell uname | awk '{print tolower($$0)}')
+JAVAH?=javah
+CC?=gcc
+CFLAGS?=-O3 -g -flto -Wall -Werror -Wextra -pedantic -fPIC
+CFLAGS+=-I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/$(SYSTEM)
+LDFLAGS?=-shared