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IDProjectCategoryView StatusDate SubmittedLast Update
0010531CMakeCMakepublic2010-04-09 15:212016-06-10 14:31
ReporterMichael Wild 
Assigned ToKitware Robot 
PlatformOSOS Version
Product VersionCMake-2-8 
Target VersionFixed in Version 
Summary0010531: Install-rules for individual components
DescriptionInstalling individual components is currently non-intuitive and tedious. People expect to be able to simply type:

make install-man
make install-bin
make install-shlibs

or similar.
Additional InformationA first implementation of this feature can be found here: [^]

However, the corresponding tests still need to be implemented.
TagsNo tags attached.
Attached Files

- Relationships Relation Graph ] Dependency Graph ]
related to 0011142closedEric NOULARD INSTALL() should have a "make-package-only" option 

-  Notes
Eric NOULARD (developer)
2012-02-02 04:48

May be an alternative implementation could use env var COMPONENT
in the same way DESTDIR is currently used.

This could be used like this:

make COMPONENT=headers install

The sole modification needed would be to add the following code snippet:

# User provided component request
   message(STATUS "User request for component...${COMPONENT}")

at the beginning of all generated "cmake_install.cmake" files.

The main drawback compared to Michael approach are:
  1) You don't get a new install target
     so that it may not be easy to use in an IDE

  2) You can specify non-existing component.
     Which will work but install nothing :-(

I don't know if 1) is important.
2) may be fixed by generating some checking before setting up
Brad King (manager)
2012-02-02 08:17

I think Eric's approach is pretty simple and will work well for Makefile generators. It's not mutually exclusive with having multiple install-XXX targets in the Makefiles either.

One reason I'm hesitant on multiple install-XXX targets (besides cluttering the IDEs) is that there have been numerous feature requests for making the CMake-provided targets like "install" and "clean" into first-class targets. That would allow projects to add their own custom commands and dependencies to such targets. The feature is difficult to define because of the per-directory behavior of such targets in the generated Makefiles. Adding more such targets will only complicate eventual inclusion of the feature.

Furthermore I've always thought of component installations to be a feature used by packagers whose scripts can invoke cmake_install.cmake directly with the proper arguments. A nice end-user interface has never been a priority.
Alexander Broekhuis (reporter)
2012-08-14 03:51

As an addition/alternative to Eric's proposed solution, why not add the COMPONENT or CMAKE_INSTALL_COMPONENT to the generated Makefile, if it is set?

This way the user can:
A) Supply the component on the command line
B) Set it in the CMake files

This allows a user to override the install, but also a possibility to add custom targets by setting the component from cmake.
Eric NOULARD (developer)
2012-08-14 17:18

I don't think it would make much sense to set
"COMPONENT" inside a CMakeLists.txt.

What we could do is to define something like "CMAKE_COMPONENTS_ALL"
in order to mimic what "CPACK_COMPONENTS_ALL" currently do.
see cpack --help-variable CPACK_COMPONENTS_ALL.

CMAKE_COMPONENTS_ALL would contains the list of COMPONENT to be installed
if none are specified.

Note however that defining such a variable in a CMakeLists.txt may be difficult
because COMPONENT are known to CMake **after** INSTALL commands are processed.

Most of the time we won't be able to check whether if the content
of CPACK_COMPONENTS_ALL is valid or not.
Kitware Robot (administrator)
2016-06-10 14:27

Resolving issue as `moved`.

This issue tracker is no longer used. Further discussion of this issue may take place in the current CMake Issues page linked in the banner at the top of this page.

- Issue History
Date Modified Username Field Change
2010-04-09 15:21 Michael Wild New Issue
2010-04-28 09:23 Bill Hoffman Status new => assigned
2010-04-28 09:23 Bill Hoffman Assigned To => Brad King
2012-02-02 04:48 Eric NOULARD Note Added: 0028447
2012-02-02 08:17 Brad King Note Added: 0028450
2012-02-02 08:17 Brad King Assigned To Brad King =>
2012-02-02 08:17 Brad King Status assigned => backlog
2012-08-14 03:51 Alexander Broekhuis Note Added: 0030633
2012-08-14 17:18 Eric NOULARD Note Added: 0030657
2012-11-10 09:47 Eric NOULARD Relationship added related to 0011142
2016-06-10 14:27 Kitware Robot Note Added: 0041680
2016-06-10 14:27 Kitware Robot Status backlog => resolved
2016-06-10 14:27 Kitware Robot Resolution open => moved
2016-06-10 14:27 Kitware Robot Assigned To => Kitware Robot
2016-06-10 14:31 Kitware Robot Status resolved => closed

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