How can I detect the operating system in Perl?

I have Perl on Mac, Windows and Ubuntu. How can I tell from within the script which one is which? Thanks in advance.

Edit: I was asked what I am doing. It is a script, part of our cross-platform build system. The script recurses directories and figures out what files to build. Some files are platform-specific, and thus, on Linux I don't want to build the files ending with _win.cpp, etc.

Answers


Examine the $^O variable which will contain the name of the operating system:

print "$^O\n";

Which prints linux on Linux and MSWin32 on Windows.

You can also refer to this variable by the name $OSNAME if you use the English module:

use English qw' -no_match_vars ';
print "$OSNAME\n";

According to perlport, $^O will be darwin on Mac OS X.


You can also use the Config core module, which can provide the same information (and a lot more):

use Config;

print "$Config{osname}\n";
print "$Config{archname}\n";

Which on my Ubuntu machine prints:

linux
i486-linux-gnu-thread-multi

Note that this information is based on the system that Perl was built, which is not necessarily the system Perl is currently running on (the same is true for $^O and $OSNAME); the OS won't likely be different but some information, like the architecture name, may very well be.


Need Your Help

Android studio not opening Maven Integration Dialog

android plugins android-studio gradle maven-plugin

Upgraded Android Studio to 1.3 and Maven Integration dialog is not opening?

Remove an element from observableArray inside another observableArray in knockout

knockout.js ko.observablearray

After finishing knockout tutorial working with lists and collections I decided to go a little bit further to implement two level nesting with knockout.

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.