From the javac docs: -source Specifies the version of source code accepted. -target Generate class files that target a specified version of the VM. Class files will run on the specified target and on later versions, but not on earlier versions of the VM. In your example: -source 1.5 and -target 1.6 This would be … Read more
Compatibility notes for various versions: Java 1.4 Java 5 Java 6 Java 7 Java 8 The first major hiccup I remember was the introduction of assert in Java 1.4. It affected a lot of JUnit code.
The abstract from P1008, the proposal that led to the change: C++ currently allows some types with user-declared constructors to be initialized via aggregate initialization, bypassing those constructors. The result is code that is surprising, confusing, and buggy. This paper proposes a fix that makes initialization semantics in C++ safer, more uniform,and easier to teach. … Read more
The man pages of gcc on Mac OS X say that they’re synonymous: -mmacosx-version-min=version The earliest version of MacOS X that this executable will run on is version. Typical values of version include 10.1, 10.2, and 10.3.9. This value can also be set with the MACOSX_DEPLOYMENT_TARGET environment variable. If both the command-line option is specified … Read more
VS2012 projects are mostly* backwards compatible with VS2010 SP1. The projects will undergo a conversion/migration process like in all previous VS versions, but this one is friendly towards VS2010. You should be able to make changes to your projects/references/code files and open them again in VS2010 without issues. I say mostly because there are some … Read more
In general, no. The backwards compatibility means that you can run Java 7 program on Java 8 runtime, not the other way around. There are several reasons for that: Bytecode is versioned and JVM checks if it supports the version it finds in .class files. Some language constructs cannot be expressed in previous versions of … Read more
The frameworks are designed to be backwards-compatible; if you have a program written in .NET 2.0, you can run it in the 4.0 runtime, because none of the frameworks ever remove functionality that a prior version had (which is why we still have the non-generic collections like ArrayList, even though they’re deprecated in favor of … Read more
Does the C++03 standard mandate that std::vector must have a constructor defined as above, i.e. with a default argument? In particular is there a guarantee that the entries of the vector object get copied instead of default constructed? Yes, the specified behavior is that x is copied n times so that the container is initialized … Read more
There are already two compilers that support C++ modules clang: http://clang.llvm.org/docs/Modules.html MS VS 2015: http://blogs.msdn.com/b/vcblog/archive/2015/12/03/c-modules-in-vs-2015-update-1.aspx The Microsoft approach appears to be the one gaining the most traction, mainly because Microsoft are throwing a lot more resources at their implementation than any of the clang folk currently. See https://llvm.org/bugs/buglist.cgi?list_id=100798&query_format=advanced&component=Modules&product=clang for what I mean, there are some … Read more
Updating this answer as Lollipop OS is officially released with support libraries, which you can use inside your project to provide compatibility to older versions. Support library: v7 appcompat library This library adds support for the Action Bar user interface design pattern. This library includes support for material design user interface implementations. If you are … Read more