Re: Not able to pass multiple arguments to javac

> I doubt those message come from javac. They were printed by maven when
> I ran it with -X option. Tell me what is the option that is *not*
> supported by javac. AFAIK, all the options that I want to pass are
> very much supported by javac. Check out the documentation [1] of javac
> that comes with Sun JDK 6.
>
> More over, JDK 6 compiler allows to provide plugins to javac. In order
> to configure the plugin user may have to pass options that are *not*
> meant for javac itself, instead they are meant for the javac plugin.
> Such options will never be supported by maven-javac-plugin, hence
> compilerArgument is the only way to use them. In case of Sun JDK, any
> javac option starting -A is passed onto the plugin. An example is
> available at [2]. I actually faced all my maven issues while
> developing that plugin.
>
> My observation is that when multiple compilerArgument is used, only
> the last one is considered.
>
> Thanks,
> Sahoo
>
> [1] http://java.sun.com/javase/6/docs/technotes/tools/solaris/javac.html
> [2]
> http://weblogs.java.net/blog/ss141213/archive/2007/11/a_javac_plugin_1.html 
>
> nicklist@... wrote:
>> The fault message you see is actually from javac itself. You're
>> trying to add options that are not supported by javac. All javac
>> options are "supported" by the mojo, it simply passes them to javac.
>>
>> Why would you want to add options to javac which are not supported by
>> javac?
>>
>> With regards,
>>
>> Nick Stolwijk
>>
>>
>> -----Original Message-----
>> From: Sanjeeb.Sahoo@... on behalf of Sahoo
>> Sent: Mon 11/26/2007 5:12 PM
>> To: Maven Users List
>> Subject: Re: Not able to pass multiple arguments to javac
>>  
>> Yes, I knew that approach, but the options I actually want to pass
>> are not supported by the mojo. nowarn and verbose were just used as
>> examples; I want to pass -proc:none and -implicit. They are not
>> supported by javac. There are many such options which are not
>> supported by the mojo. I thought compilerArgument is the way to use
>> them. But, it is *not* working.
>>
>> Thanks,
>> Sahoo
>>
>> Jeff Jensen wrote:
>>  
>>> Try this approach:
>>>
>>>         <configuration>
>>>           <fork>true</fork>
>>>           <maxmem>1024m</maxmem>
>>>           <showDeprecation>true</showDeprecation>
>>>           <showWarnings>true</showWarnings>
>>>           ....etc...
>>>         </configuration>
>>>
>>> To know element names to use, use the Name found in the Optional
>>> Parameters
>>> section of this page:
>>>  
>>> http://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html
>>>
>>>
>>>      
>>>> -----Original Message-----
>>>> From: Sanjeeb.Sahoo@... [mailto:Sanjeeb.Sahoo@...] On
>>>> Behalf Of
>>>>          
>>> Sahoo
>>>      
>>>> Sent: Monday, November 26, 2007 8:25 AM
>>>> To: Maven Users List
>>>> Subject: Re: Not able to pass multiple arguments to javac
>>>>
>>>> Ignore my earlier email. The suggestion actually does *not* work.
>>>> When I
>>>> run with -X option, it shows only the last compilerArgument. See the
>>>> following output:
>>>>
>>>> [DEBUG] Configuring mojo
>>>> 'org.apache.maven.plugins:maven-compiler-plugin:2.0.2:compile' -->
>>>> [DEBUG]   (f) basedir = /tmp/my-app
>>>> [DEBUG]   (f) buildDirectory = /tmp/my-app/target
>>>> [DEBUG]   (f) classpathElements = [/tmp/my-app/target/classes]
>>>> [DEBUG]   (f) compileSourceRoots = [/tmp/my-app/src/main/java]
>>>> [DEBUG]   (f) compilerArgument = -verbose
>>>> [DEBUG]   (f) compilerId = javac
>>>> [DEBUG]   (f) debug = true
>>>> [DEBUG]   (f) failOnError = true
>>>> [DEBUG]   (f) fork = false
>>>> [DEBUG]   (f) optimize = false
>>>> [DEBUG]   (f) outputDirectory = /tmp/my-app/target/classes
>>>> [DEBUG]   (f) outputFileName = my-app-1.0-SNAPSHOT
>>>> [DEBUG]   (f) projectArtifact =
>>>> com.mycompany.app:my-app:jar:1.0-SNAPSHOT
>>>> [DEBUG]   (f) showDeprecation = false
>>>> [DEBUG]   (f) showWarnings = false
>>>> [DEBUG]   (f) staleMillis = 0
>>>> [DEBUG]   (f) verbose = false
>>>> [DEBUG] -- end configuration --
>>>>
>>>> Thanks,
>>>> Sahoo
>>>>
>>>> Sahoo wrote:
>>>>          
>>>>> Thanks, that works.
>>>>>
>>>>> Sahoo
>>>>>
>>>>> Wayne Fay wrote:
>>>>>              
>>>>>> Try this, Sahoo:
>>>>>>
>>>>>> <plugin>
>>>>>>    <groupId>org.apache.maven.plugins</groupId>
>>>>>>    <artifactId>maven-compiler-plugin</artifactId>
>>>>>>    <configuration>
>>>>>>        <compilerArgument>-nowarn</compilerArgument>
>>>>>>        <compilerArgument>-verbose</compilerArgument>
>>>>>>    </configuration>
>>>>>> </plugin>
>>>>>>
>>>>>> On 11/22/07, Sahoo <Sahoo@...> wrote:
>>>>>>
>>>>>>                  
>>>>>>> As suggested in [1], I tried configuring maven-compiler-plugin like
>>>>>>> this:
>>>>>>>
>>>>>>>          <compilerArgument>-nowarn -verbose</compilerArgument>
>>>>>>>
>>>>>>> But it causes compilation failure. Details given below:
>>>>>>>
>>>>>>> Failure executing javac, but could not parse the error:
>>>>>>> javac: invalid flag: -nowarn -verbose
>>>>>>>
>>>>>>> How can I pass multiple arguments to javac?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Sahoo
>>>>>>> [1]
>>>>>>> http://maven.apache.org/plugins/maven-compiler-plugin/examples/pass- 
>>>>>>>
>>>>>>>                      
>>>> compiler-arguments.html
>>>>          
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>>>>>>>
>>>>>>>                      
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>>>>>>
>>>>>>                  
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