對我來說，確保包含JDK安裝是一件簡單的事情(我只有JRE)。 我的openJDK輸出看起來像：

Java interpreter : /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java

Java version : 1.8.0_191

Java home path : /usr/lib/jvm/java-8-openjdk-amd64/jre

Java compiler : not present

Java headers gen.:

Java archive tool:

trying to compile and link a JNI program

detected JNI cpp flags :

detected JNI linker flags : -L$(JAVA_HOME)/lib/amd64/server -ljvm

gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG -fpic -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g -c conftest.c -o conftest.o

conftest.c:1:17: fatal error: jni.h: No such file or directory

compilation terminated.

/usr/lib/R/etc/Makeconf:159: recipe for target 'conftest.o' failed

make: *** [conftest.o] Error 1

Unable to compile a JNI program

JAVA_HOME : /usr/lib/jvm/java-8-openjdk-amd64/jre

Java library path:

JNI cpp flags :

JNI linker flags :

Updating Java configuration in /usr/lib/R

Done.

實際上，我的$JAVA_HOME中沒有openJDK文件。非常簡單的補救措施：

sudo apt-get install openjdk-8-jre openjdk-8-jdk

(請注意，這是專門為安裝openJDK而設計的，而不是從Oracle安裝的)

事后一切順利：

Java interpreter : /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java

Java version : 1.8.0_191

Java home path : /usr/lib/jvm/java-8-openjdk-amd64/jre

Java compiler : /usr/lib/jvm/java-8-openjdk-amd64/jre/../bin/javac

Java headers gen.: /usr/lib/jvm/java-8-openjdk-amd64/jre/../bin/javah

Java archive tool: /usr/lib/jvm/java-8-openjdk-amd64/jre/../bin/jar

trying to compile and link a JNI program

detected JNI cpp flags : -I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/linux

detected JNI linker flags : -L$(JAVA_HOME)/lib/amd64/server -ljvm

gcc -std=gnu99 -I/usr/share/R/include -DNDEBUG -I/usr/lib/jvm/java-8-openjdk-amd64/jre/../include -I/usr/lib/jvm/java-8-openjdk-amd64/jre/../include/linux -fpic -g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g -c conftest.c -o conftest.o

g++ -shared -L/usr/lib/R/lib -Wl,-Bsymbolic-functions -Wl,-z,relro -o conftest.so conftest.o -L/usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server -ljvm -L/usr/lib/R/lib -lR

JAVA_HOME : /usr/lib/jvm/java-8-openjdk-amd64/jre

Java library path: $(JAVA_HOME)/lib/amd64/server

JNI cpp flags : -I$(JAVA_HOME)/../include -I$(JAVA_HOME)/../include/linux

JNI linker flags : -L$(JAVA_HOME)/lib/amd64/server -ljvm

Updating Java configuration in /usr/lib/R

Done.

總結

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