The byte code generated by the compiler is totally independent from the JVM that will be used to run it. So I think the point is not «How to compile using the right JDK?» but «How to run with using the right JVM?» Am I wrong? If so, this can't be done at compile time, so it can't be done via maven, unless you use antrun maven's plugin to create a ant task to launch your program.
2012/6/13 Gilles Sadowski <gil...@harfang.homelinux.org> > Hello. > > > > > With maven, you can configure the compiler to compile in the version you > > want. > > > > Add this to the pom.xml and set the arguments as you which. > > > > <build> > > <pluginManagement> > > <plugin> > > <groupId>org.apache.maven.plugins</groupId> > > <artifactId>maven-compiler-plugin</artifactId> > > <version>2.4</version> > > <configuration> > > <encoding>UTF-8</encoding> > > <source>1.6</source> > > <target>1.6</target> > > <compilerArguments> > > <Xlint:-unchecked /> > > </compilerArguments> > > </configuration> > > </plugin> > > > > See http://maven.apache.org/plugins/maven-compiler-plugin/ for more > > informations. > > I had seen that, but that cannot be the whole story (unless there is some > maven magic involved); indeed, how can maven differentiate > java-6-openjdk-amd64 > from > java-6-sun > (since both are Java 1.6)? > > I was thinking that there should be some environment variable(s) whose > setting would somehow activate the above configuration. > > > Regards, > Gilles > > > > > > > 2012/6/13 Gilles Sadowski <gil...@harfang.homelinux.org> > > > > > On Wed, Jun 13, 2012 at 12:48:31PM +0200, Jochen Wiedmann wrote: > > > > Yes, that switch is called PATH (environment variable). > > > > > > Do you mean that I should change the PATH variable just to build > Commons > > > Math? > > > I surely hope that there is a more flexible way. > > > > > > With "ant", all that's needed is to define JAVA_HOME (another > environment > > > variable, but specific to the task at hand). > > > > > > > On Wed, Jun 13, 2012 at 12:19 PM, Gilles Sadowski > > > > <gil...@harfang.homelinux.org> wrote: > > > > > Hello. > > > > > > > > > > Are there command-line switches that will select a specific JDK? > > > > > I.e. I have several of them installed: > > > > > > > > > > $ ls -l /usr/lib/jvm > > > > > total 36 > > > > > lrwxrwxrwx 1 root root 24 Dec 17 11:04 default-java -> > > > java-1.6.0-openjdk-amd64 > > > > > lrwxrwxrwx 1 root root 18 Jan 5 18:27 java-1.5.0-gcj -> > > > java-1.5.0-gcj-4.6 > > > > > drwxr-xr-x 6 root root 4096 Jan 18 15:04 java-1.5.0-gcj-4.4 > > > > > drwxr-xr-x 6 root root 4096 Mar 7 17:33 java-1.5.0-gcj-4.6 > > > > > lrwxrwxrwx 1 root root 23 Aug 11 2010 java-1.5.0-sun -> > > > java-1.5.0-sun-1.5.0.22 > > > > > drwxr-xr-x 10 root root 4096 Aug 11 2010 java-1.5.0-sun-1.5.0.22 > > > > > lrwxrwxrwx 1 root root 20 Dec 16 18:51 java-1.6.0-openjdk-amd64 > -> > > > java-6-openjdk-amd64 > > > > > lrwxrwxrwx 1 root root 20 May 3 14:00 java-1.7.0-openjdk-amd64 > -> > > > java-7-openjdk-amd64 > > > > > drwxr-xr-x 3 root root 4096 Jan 18 15:38 java-6-openjdk > > > > > drwxr-xr-x 7 root root 4096 Mar 7 17:29 java-6-openjdk-amd64 > > > > > drwxr-xr-x 3 root root 4096 Jan 18 15:38 java-6-openjdk-common > > > > > lrwxrwxrwx 1 root root 19 Jun 9 2011 java-6-sun -> > > > java-6-sun-1.6.0.26 > > > > > drwxr-xr-x 8 root root 4096 Jan 18 15:47 java-6-sun-1.6.0.26 > > > > > drwxr-xr-x 7 root root 4096 Jun 5 17:12 java-7-openjdk-amd64 > > > > > drwxr-xr-x 3 root root 4096 Jun 5 17:12 java-7-openjdk-common > > > > > lrwxrwxrwx 1 root root 12 Jan 5 18:27 java-gcj -> java-gcj-4.6 > > > > > lrwxrwxrwx 1 root root 18 Apr 29 2010 java-gcj-4.4 -> > > > java-1.5.0-gcj-4.4 > > > > > lrwxrwxrwx 1 root root 18 Nov 14 2011 java-gcj-4.6 -> > > > java-1.5.0-gcj-4.6 > > > > > > > > > > and I'd like to be able to say something like > > > > > -D...=/usr/lib/jvm/java-7-openjdk-amd64 > > > > > so that maven will use the corresponding compiler and JVM. > > > > > > > > > > Does the default configuration already cares for this? If so, which > > > are the > > > > > command-lins options? > > > > > > > > > > If not, I guess that this should be defined in a "profile" in > > > > > "settings.xml". If so, could someone post such a profile? > > > > > > > > > > > > > > > Thanks, > > > > > Gilles > > > > > > > > > > > --------------------------------------------------------------------- > > > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > > > For additional commands, e-mail: dev-h...@commons.apache.org > > > > > > > > > > > > -- > > Xavier DETANT > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org > > -- Xavier DETANT
