Foundation.System.Info

get the operating system on which the program is running.

Either return the known OS or a strict String of the OS name.

This function uses the base's os function.

Enumeration of the known GHC supported architecture.

get the machine architecture on which the program is running

Either return the known architecture or a Strict String of the architecture name.

This function uses the base's arch function.

returns the number of CPUs the machine has

endianness of the current architecture

get the compiler name

get the compilerName from base package but convert it into a strict String

The version of compilerName with which the program was compiled or is being interpreted.

Example

ghci> compilerVersion
Version {versionBranch = [8,8], versionTags = []}

A Version represents the version of a software entity.

An instance of Eq is provided, which implements exact equality modulo reordering of the tags in the versionTags field.

An instance of Ord is also provided, which gives lexicographic ordering on the versionBranch fields (i.e. 2.1 > 2.0, 1.2.3 > 1.2.2, etc.). This is expected to be sufficient for many uses, but note that you may need to use a more specific ordering for your versioning scheme. For example, some versioning schemes may include pre-releases which have tags "pre1", "pre2", and so on, and these would need to be taken into account when determining ordering. In some cases, date ordering may be more appropriate, so the application would have to look for date tags in the versionTags field and compare those. The bottom line is, don't always assume that compare and other Ord operations are the right thing for every Version.

Similarly, concrete representations of versions may differ. One possible concrete representation is provided (see showVersion and parseVersion), but depending on the application a different concrete representation may be more appropriate.