[R] Can't get R to recognize Java for rJava installation

[Milan Bouchet-Valat]

Le jeudi 12 avril 2012 à 13:41 -0700, Waichler, Scott R a écrit :
> Hi, I am unable to install the package rJava.  I tried doing what the output suggests, but it doesn't help.  How can I get R to find/recognize my Java installation?  I am running R-2.15.0.
> 
> waichler at snow> sudo R CMD javareconf
> Java interpreter : /usr/bin/java
> Java version     : 1.6.0_22
> Java home path   : /usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre
> Java compiler    : /usr/bin/javac
> Java headers gen.:
> Java archive tool: /usr/bin/jar
> Java library path: $(JAVA_HOME)/lib/i386/client:$(JAVA_HOME)/lib/i386:$(JAVA_HOME)/../lib/i386:/usr/java/packages/lib/i386:/lib:/usr/lib
> JNI linker flags : -L$(JAVA_HOME)/lib/i386/client -L$(JAVA_HOME)/lib/i386 -L$(JAVA_HOME)/../lib/i386 -L/usr/java/packages/lib/i386 -L/lib -L/usr/lib -ljvm
> JNI cpp flags    :
> 
> Updating Java configuration in /usr/lib/R
> Done.
> 
> > install.packages(c("rJava"), dependencies = T, repos = "http://cran.fhcrc.org")
> . . . 
> checking whether siglongjmp is declared... yes
> checking Java support in R... present:
> interpreter : '/usr/bin/java'
> archiver    : '/usr/bin/jar'
> compiler    : '/usr/bin/javac'
> header prep.: ''
> cpp flags   : ''
> java libs   : '-L/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre/lib/i386/client -L/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre/lib/i386 -L/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0/jre/../lib/i386 -L/usr/java/packages/lib/i386 -L/lib -L/usr/lib -ljvm'
> configure: error: One or more Java configuration variables are not set.
> Make sure R is configured with full Java support (including JDK). Run
> R CMD javareconf
> as root to add Java support to R.
> 
> If you don't have root privileges, run
> R CMD javareconf -e
> to set all Java-related variables and then install rJava.
> 
> ERROR: configuration failed for package ÆrJavaÇ
> * removing Æ/usr/lib/R/library/rJavaÇ
It looks like you need "Java headers gen." to be set. Here on my box
(Fedora 16) it is:
Java headers gen.: /usr/bin/javah

So I guess you need to find out what package provides this file on your
distribution (which you did not mention). First check the file is
currently not present.


Cheers