Specifically, for the OBJECT library feature, I figured out what
version of CMake introduced it like this:
gitk -- Tests/ObjectLibrary/CMakeLists.txt
leads to finding this first commit of that file: 69d3d183 [1]
gitk 69d3d183
leads to b87d7a60 [2] (4 parent commits up) which introduced the
feature itself. Then,
git describe --contains b87d7a60
yields:
v2.8.8~29^2~15
So.... OBJECT libraries were introduced in CMake v2.8.8. Also, in all
the gitk views for these commits, it tells you "Follows: v2.8.7" and
"Precedes: v2.8.8".
You could therefore write code like:
if (${CMAKE_VERSION} VERSION_LESS 2.8.8)
# avoid OBJECT libraries
else()
# ok to use OBJECT libraries
endif()
HTH,
David C.
[1] http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=69d3d183
[2] http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=b87d7a60
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