如何在提交之前自动化或促进多平台构建/测试？

Our software is built on linux and windows platforms. Depending on the preference of the developer a contribution is developed and tested on either platform and then committed to our subversion repository. It then turns out that the contribution doesn't build on the other platform, and a fix has to be made. The fix on the other platform may again break the build on the original platform, and so on.Our software is built on linux and windows plat