For instance my cross-compiler for MinGW32 has its binaries called imingw32msvc-gcc , imingw32msvc-ld , imingw32msvc-as , etc. Here is how we could build amhello The --host and --build options are usually all we need for cross-compiling. Owing to this, a lot of beginners get thrown off guard when enlisted to cross-compile modules. In this article we will discuss some general principles and methods to adopted in different projects to get an idea of what to expect and what to provide in a project.
Hopefully, this will in someday help you cross-compile without breaking a sweat. Before we get into the specifics, we will take a detour and explain cross-compilation for the beginners. Those of you who are already familiar with the basics, feel free to skip the intro section. It is the process of building an executable from source with a suitable compiler cross-compiler in one machine that can be directly executed in another.
That is, the build and host machines are not of the same architecture more on these terms later. In other words, it is compilation of sources in one architecture that can be run on another with a suitable compiler. Predominantly, cross-compilation is used in the embedded world it is used elsewhere as well where the host platform where the application will run is severely limited in resources.
These limitations in the host system preclude the possibility of having a compiler on-board and ergo, the need for cross-compilation. It depends on a lot of things. There are other factors such as, assumptions made on endianness , alignment or word size , that can cause serious breakage in functionality when cross compiled.
Going into the details on each of those topics and how exactly they surface is beyond the scope of this article, but Wikipedia has some nice write-ups if you are so inclined. With that said, there are still a vast majority of small projects, that with little effort can be cross compiled successfully. Partly, due to the complexity in requirement of the system you are trying to cross-compile.
The biggest hurdle in cross compilation is meeting all dependencies of a given software package. This also ensures all dependencies of that package is met: which is actually the most tricky part. When cross compiling, the task of dependency resolution is left to us.
You will soon come to the realization that curl depends on openssl and zlib and more depending on your need. Openssl in turn depends on pcre and some more packages.
Now you have to cross compile three or more other packages to compile curl. Now that we have covered the basics, let us jump into the actual topic. You might be surprised at the number of ways in which you can get something cross-compiled.
As explained above, its just a matter of exporting a bunch of variables to your shells environment and then initiating the compilation process. In the following sections we will see some of the popular methods.
Active 2 years, 3 months ago. Viewed 33k times. Improve this question. Add a comment. Active Oldest Votes. Common examples include many embedded systems, but also typical game consoles. Improve this answer. Nicole And the systems have different architectures. Most smart phones use cross-compilation to the ARM architecture. A cross-compiler is compiles the source code from one architecture to another architecture.
For example: hello. This you are compiling on the host pc for a target board e. In this example arm-cortexa8-linux-gnueabihf-gcc is called the 'cross compiler'. Dillon Chaffey Dillon Chaffey 1 1 gold badge 2 2 silver badges 3 3 bronze badges.
In a strict sense, it is the compilation of code on one host that is intended to run on another. Alex Balashov Alex Balashov 3, 4 4 gold badges 23 23 silver badges 34 34 bronze badges. Sandeep Ranjan Sandeep Ranjan 12 12 silver badges 31 31 bronze badges. Sign up or log in Sign up using Google.
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