On August 31, we celebrated the 20th anniversary of CMake. We recently had a virtual interview with Bill Hoffman, Kitware CTO and founder, and original creator of CMake, to ask him five questions as he reflected on this milestone.
When CMake was first created, did you envision it would become what it is today?
We always joked at the start that the goal was world domination. However, the depth of market penetration with over 50% of all C++ projects using CMake has exceeded expectations. None of this would have been possible without the active open source developer community that has arisen around CMake with major contributors coming from all over the world. In addition I want to thank Dr. Terry Yoo who was at NLM when he funded the initial CMake work as part of the Insight Toolkit.
Looking back, what is the biggest impact you think CMake has made on the software industry?
It is hard to judge the impact of an open source project like CMake. We know that it is widely used and allows C++ developers to focus on the projects they are implementing instead of how to build them. One amazing thing to see is the number of job postings that list CMake as a job requirement. I have been approached by people at conferences that thank me for making their PhD thesis work easier because of CMake. It’s a very humbling experience!
One of the main features of CMake is the ability for different C++ libraries to easily be assembled together. This has allowed both commercial applications and advanced researchers to more quickly and robustly advance technology in everything from stock trading to self-driving cars.
Kitware’s own open source offerings, VTK, ITK, ParaView, 3DSlicer, and KWIVER, have benefited tremendously from CMake in areas including cross-platform support and automated testing. When the popular KDE desktop adopted CMake, it created a fantastic partnership between the KDE developers and CMake developers. One of the most surprising adoptions of CMake came from Microsoft’s Visual Studio. I never would have imagined that CMake would be delivered as part of Visual Studio as it currently is.
CMake will continue to fill the niche in the C++ ecosystem providing cross-platform build capabilities. It is impossible to predict the future but I hope CMake will be in use as long as C++ is still in use.
I just want to thank all of the CMake users and developers who have kept the project growing and thriving for the last 20 years. Without you, CMake would not be what it is today!
For a trip down memory lane, check out this post from August 31, 2000, when Bill first introduced CMake to the ITK community.
Cmake Interview Questions and Answers 2019 | Cmake Interview Questions | Wisdom Jobs
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A CMake Generator is responsible for writing the input documents for a local build device. Exactly one of the CMake Generators have to be selected for a build tree to decide what local build system is to be used. Optionally one of the Extra Generators may be selected as a variant of a number of the Command-Line Build Tool Generators to supply task files for an auxiliary IDE.
This means that there is a CMakeCache.Txt document in the source tree,probably as part of an existing in-supply build. If CMake is given the course to a directory with a CMakeCache.Txt file, it assumes the directory is a build tree. Therefore if one runs “cmake ../mysrc” to construct out-of-supply however there may be a mysrc/CMakeCache.Txt record then cmake will deal with mysrc because the construct tree. This is a aspect-effect of the characteristic that allows “cmake .” to be used to regenerate a build tree. The behavior will not be changed due to the fact mixing in-source and out-of-source builds is not secure besides (configured headers may be determined in the incorrect area).
CMake does no longer presently aid convenience libraries. A “convenience” library, as GNU libtool calls it, is an archive of items to be blended into other libraries. Other libraries “link” to the convenience library, but the convenience library does now not export any symbols; GNU libtool never installs the benefit library; no packages ever hyperlink to the benefit library. This does no longer suggest that a undertaking using convenience libraries can’t be transformed to CMake. Instead the source files may be indexed in each goal that needs them. They will be constructed for every target separately the use of all of the preprocessor definitions and flags configured for that target.
Not immediately. The cost of this assets isn’t always stored within the task files. It is saved in more documents created through the IDE whilst an answer is loaded (VS .NET 2003 makes use of a hidden .Suo file subsequent to the .Sln answer document). The layout of those files is not known to CMake and can’t be generated. In some versions of VS the documents are binary and now not human readable. However, for Visual Studio versions as a minimum 2005 and more recent, Ryan Pavlik maintains CMake modules that could create these documents: main script, additionally calls for this listing.
CMake construct settings are saved in the CMake cache similar to a project’s construct tree. They are called CMake “cache entries” and have no relation to your command shell’s surroundings variables. Use a CMake GUI (CMakeSetup on Windows or ccmake on UNIX) or the wizard mode (cmake -i) to edit cache entries. Initial values may also be designated for a build by using the -D command line argument to cmake while it’s miles first run to supply a new construct tree.
It is hard to judge the impact of an open source project like CMake. We know that it is widely used and allows C++ developers to focus on the projects they are implementing instead of how to build them. One amazing thing to see is the number of job postings that list CMake as a job requirement. I have been approached by people at conferences that thank me for making their PhD thesis work easier because of CMake. It’s a very humbling experience!
CMake will continue to fill the niche in the C++ ecosystem providing cross-platform build capabilities. It is impossible to predict the future but I hope CMake will be in use as long as C++ is still in use.
Kitware’s own open source offerings, VTK, ITK, ParaView, 3DSlicer, and KWIVER, have benefited tremendously from CMake in areas including cross-platform support and automated testing. When the popular KDE desktop adopted CMake, it created a fantastic partnership between the KDE developers and CMake developers. One of the most surprising adoptions of CMake came from Microsoft’s Visual Studio. I never would have imagined that CMake would be delivered as part of Visual Studio as it currently is.
Looking back, what is the biggest impact you think CMake has made on the software industry?
One of the main features of CMake is the ability for different C++ libraries to easily be assembled together. This has allowed both commercial applications and advanced researchers to more quickly and robustly advance technology in everything from stock trading to self-driving cars.
Set up NDK Compile the version of the chain , If not set , Use the latest .
use cmake Cross compilation is quite simple , Basically, it can be written at one time , The purpose of running every time .
Set to true, Each… Will be used api level Obsolete header file in , Instead of using a unified header file . The default is false, Use a unified header file .
There are two ways to cross compile Android platform , First, use. ndk compile , The other is to compile with your own tool chain , I feel like I can only ndk compile , On the other hand, I wont introduce , Because I wont .
It wont just stay in the official tutorial . As an Android Developer , There is really no linux c Program development experience , I hope the big guys will forgive me . The tutorial is in macos Next finish , Most of the linux Ive also tested , If there are special instructions, I will mark them out . This tutorial is based on cmake-3.10.2, At the same time, I think you have installed cmake.
FAQ
For what purpose CMake is used?
What is CMake build system?
CMake is a meta build system that uses scripts called CMakeLists to generate build files for a specific environment (for example, makefiles on Unix machines). When you create a new CMake project in CLion, a CMakeLists. txt file is automatically generated under the project root.
