Introduce a variable to identify in-source build
authorTeemu Murtola <teemu.murtola@gmail.com>
Sun, 21 Sep 2014 11:11:48 +0000 (14:11 +0300)
committerTeemu Murtola <teemu.murtola@gmail.com>
Sun, 21 Sep 2014 11:11:48 +0000 (14:11 +0300)
This makes it easier to find all conditionals that test for it (in case
someone may want to fix those), and makes the CMake code easier to read.

Change-Id: Ic7df20cd9829080005d021e101c4559143bb3cc1


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