[cmake-developers] [CMake 0015998]: Add variable to cmake in order to decide whether building is for android

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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https://cmake.org/Bug/view.php?id=15998 
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Reported By:                huiyiqun
Assigned To:                
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Project:                    CMake
Issue ID:                   15998
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2016-03-02 00:26 EST
Last Modified:              2016-03-02 00:26 EST
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Summary:                    Add variable to cmake in order to decide whether
building is for android
Description: 
I'm build a cmake project(YouCompleteMe) under Android. Everything works well
except that ld try to link librt wrongly, which has been integrated into Bionic
and not available under Android System.

I have googled for a while to look for a solution to detect android system in
cmake, but there is none.

If I am building a program for Mac OS X, there is a variable APPLE to tell me
that this is a Mac OS X instead of normal BSD. But there is no variable ANDROID
to tell me that this is a Android System instead of normal Linux. In my opinion,
these two scenes are similar.

Of course, I could define a variable to differ Android from normal Linux. but I
guess we need an official way to do this.
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Issue History 
Date Modified    Username       Field                    Change               
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2016-03-02 00:26 huiyiqun       New Issue                                    
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