Passing additional parameters from release-plugin

[Naveen Swamy]

Hello there,

I have a question regarding how to pass extra arguments(such as cflags) from maven release plugin to native-maven-plugin. We use codehaus native-plugin to build jni, I want to pass the cflags during release phase. However I see that I am unable to pass any of the arguments through release plugin. Any experience or pointers would help

this is mvn command which we call through a makefile similar to https://github.com/apache/incubator-mxnet/blob/48d60908a1fa42364a829ac90133d28dd0998219/Makefile#L579

```

scalareleasedryrun:

(cd $(ROOTDIR)/scala-package; \

mvn -X release:prepare -DdryRun=true -DautoVersionSubmodules=true \

-P$(SCALA_PKG_PROFILE),$(SCALA_VERSION_PROFILE) \

-Darguments=-DskipTests -Dcxx="$(CXX)" \

-Dcflags="$(CFLAGS)" -Dldflags="$(LDFLAGS)" \

-Dlddeps="$(LIB_DEP) $(ROOTDIR)/lib/libmxnet.a")

```

The parent pom file is here

https://github.com/apache/incubator-mxnet/blob/master/scala-package/pom.xml

and the pom file to compile native code is here https://github.com/apache/incubator-mxnet/blob/master/scala-package/init-native/osx-x86_64/pom.xml#L59

I see that cflags variable used in the native pom.xml is coming as null

```

[INFO] [INFO] --- native-maven-plugin:1.0-alpha-9:compile (default-compile) @ libmxnet-init-scala-osx-x86_64 ---

[INFO] [DEBUG] Configuring mojo org.codehaus.mojo:native-maven-plugin:1.0-alpha-9:compile from plugin realm ClassRealm[extension>org.codehaus.mojo:native-maven-plugin:1.0-alpha-9, parent: sun.misc.Launcher$AppClassLoader@42a57993]

[INFO] [DEBUG] Configuring mojo 'org.codehaus.mojo:native-maven-plugin:1.0-alpha-9:compile' with basic configurator -->

[INFO] [DEBUG]   (f) compilerEndOptions = [-I../../../include, null]

[INFO] [DEBUG]   (f) compilerOutputDirectory = /Users/wamy/nswamy/deepengine/workspace/incubator-mxnet/scala-package/init-native/osx-x86_64/target/objs

[INFO] [DEBUG]   (f) compilerProvider = generic-classic

[INFO] [DEBUG]   (f) compilerStartOptions = [-std=c++0x]

[INFO] [DEBUG]   (f) dependencyIncludeDirectory = /Users/wamy/nswamy/deepengine/workspace/incubator-mxnet/scala-package/init-native/osx-x86_64/target/native/include

[INFO] [DEBUG]   (f) javahOS = darwin

[INFO] [DEBUG]   (f) jdkIncludePath = /Library/Java/JavaVirtualMachines/jdk1.8.0_171.jdk/Contents/Home/jre/../include

[INFO] [DEBUG]   (f) numberOfConcurrentCompilation = 1

[INFO] [DEBUG]   (f) project = MavenProject: org.apache.mxnet:libmxnet-init-scala-osx-x86_64:1.2.0-SNAPSHOT @ /Users/wamy/nswamy/deepengine/workspace/incubator-mxnet/scala-package/init-native/osx-x86_64/pom.xml

[INFO] [DEBUG]   (s) directory = /Users/wamy/nswamy/deepengine/workspace/incubator-mxnet/scala-package/init-native/src/main/native

[INFO] [DEBUG]   (s) fileNames = [org_apache_mxnet_init_native_c_api.cc]

[INFO] [DEBUG]   (f) sources = [org.codehaus.mojo.natives.NativeSources@1e01b195]

[INFO] [DEBUG]   (f) workingDirectory = /Users/wamy/nswamy/deepengine/workspace/incubator-mxnet/scala-package/init-native/osx-x86_64

```

I have already tried pass with -Darguments, create properties corresponding to the flags, etc., 

Appreciate pointers and advise?

[Dan Tran]

sounds like you need a profile activated at release time. see https://github.com/mojohaus/mojo-parent/blob/master/pom.xml for sample

this way you just  need to do

   mvn -B release:prepare release:perform -Pxxx-release

-Dan

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