使用nar插件创建so而不是dylib

Question

现在我在Mac上有了pljava构建。pljava使用maven和maven纳尔插件来构建。这个maven的构建目前正在创建一个dylib，而不是一个.so。看起来，postgres想要一个.so。这是打开postgres跟踪的输出：

2014-09-26 10:12:59 EDT STATEMENT:  CREATE FUNCTION sqlj.java_call_handler() RETURNS language_handler AS 'pljava' LANGUAGE C
2014-09-26 10:12:59 EDT DEBUG:  bind <unnamed> to <unnamed>
2014-09-26 10:12:59 EDT LOG:  execute <unnamed>: CREATE FUNCTION sqlj.java_call_handler() RETURNS language_handler AS 'pljava' LANGUAGE C
2014-09-26 10:12:59 EDT DEBUG:  ProcessUtility
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/PostgreSQL/9.1/lib/postgresql/pljava"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/PostgreSQL/9.1/lib/pljava"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/PostgreSQL/9.1/share/pljava/pljava"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home/jre/lib/pljava"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home/jre/lib/server/pljava"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/PostgreSQL/9.1/lib/postgresql/pljava.so"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/PostgreSQL/9.1/lib/pljava.so"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/PostgreSQL/9.1/share/pljava/pljava.so"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home/jre/lib/pljava.so"
2014-09-26 10:12:59 EDT DEBUG:  find_in_dynamic_libpath: trying "/Library/Java/JavaVirtualMachines/jdk1.7.0_60.jdk/Contents/Home/jre/lib/server/pljava.so"
2014-09-26 10:12:59 EDT ERROR:  could not access file "pljava": No such file or directory

因此，我的问题是--如何使maven nar输出成为.so文件而不是.dylib？如果我使用“共享”类型，就会创建一个dylib，如果我使用"plugin“类型，就会创建一个.bundle，如果我使用”静态“类型，链接就会失败。

Answer 1

我解决了我的问题。使用"plugin“类型可以创建正确的文件类型。迈尔斯对这个问题的回答帮助我解决了这个问题：

What are the differences between .so and .dylib on osx?

Mac建议对可加载模块进行.bundle扩展，但是移植的应用程序(如PostgreSQL)仍然希望使用.so。在我将文件名更改为pljava.so之后，PostgreSQL成功地加载了模块。