Using Apache Maven to control GCC

Hitesh Shah posted a fix to https://issues.apache.org/jira/browse/MAPREDUCE-3922 that illustrates how Maven can pass compiler flags to GCC:

From the first line of the patch, we see how to tell Maven to create a Maven-internal property P and then enable access to set that P from the shell by using -DP. In this case, the patch adds the ability to set a Maven-internal property called container-executor.additional_cflags, from the shell by using -Dcontainer-executor.additional_cflags. For example, we can do:

mvn clean install package -DskipTests -Dtar -Dcontainer-executor.additional_cflags="-m32"  -Pdist,native 

The second line of the patch changes the pom.xml at the value stored at the XPath:

/project/profiles/profile[id='native']/build/plugins/plugin[artifactId='make-maven-plugin']/configuration/configureEnvironment/property/[name='CFLAGS']/value

so that Maven will look up the value of the Maven property ${container-executor.additional_cflags} and the value to the CFLAGS (the command-line arguments that will be passed to GCC).

For example, if we do:

mvn clean install package -DskipTests -Dtar -Dcontainer-executor.additional_cflags="-m32"  -Pdist,native 

Then the container-executor binary will be created with GCC using the -m32 flag, (which will generate a 32-bit binary).

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