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Date Submitted

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0008655

CMake

public

2009-03-02 22:00

2014-06-02 08:37

Reporter

Philip Lowman

Assigned To

Brad King

Priority

normal

Severity

feature

Reproducibility

N/A

Status

closed

Resolution

fixed

Platform

OS Version

Product Version

CMake-2-6

Target Version

Fixed in Version

CMake 2.8.11

Summary

0008655: Optionally disable relinking targets against shared libraries in the Makefile generator

Description

As discussed recently on the CMake mailing list in the thread "Avoiding a relink". The makefile generator automatically causes all targets that depend on a shared library to relink themselves when it the shared library is relinked. This is a good default behavior but is often annoying at times when a user makes a trivial change to an CPP file (implementation) and would prefer not having "make" relink the entire world.

There are workarounds in the form of just making the affected target with "make foo" or "make foo/fast" and running the desired binaries.

Presumably an implementation for this in the Makefile generator would be to make dependents of shared libraries depend on a stamp file so they only relink when CMake says so. The problem is twofold, when should CMake say so, and what should be the interface for enabling this functionality.

Additional Information

CMake could catch:
* changes to header files (trigger relink)
* adding/removing source files (trigger relink)
CMake could not easily catch:
* A user removing a symbol from a shared library (ideally a relink should be triggered so executables depending on said shared library would get a link error).
* Use of "extern" in CPP files.

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Notes
(0030476) Brad King (manager) 2012-08-13 10:36	Sending issues I'm not actively working on to the backlog to await someone with time for them. If an issue you care about is sent to the backlog when you feel it should have been addressed in a different manner, please bring it up on the CMake mailing list for discussion. Sign up for the mailing list here, if you're not already on it: http://www.cmake.org/mailman/listinfo/cmake [^] It's easy to re-activate a bug here if you can find a CMake developer or contributor who has the bandwidth to take it on.

(0034329) Stephen Kelly (developer) 2013-11-02 11:14	Can be controlled with CMAKE_LINK_DEPENDS_NO_SHARED.

(0035993) Robert Maynard (manager) 2014-06-02 08:37	Closing resolved issues that have not been updated in more than 4 months.

Issue History
Date Modified	Username	Field	Change
2009-03-02 22:00	Philip Lowman	New Issue
2009-09-11 17:42	Bill Hoffman	Status	new => assigned
2009-09-11 17:42	Bill Hoffman	Assigned To	=> Brad King
2012-08-13 10:36	Brad King	Status	assigned => backlog
2012-08-13 10:36	Brad King	Note Added: 0030476
2013-11-02 11:14	Stephen Kelly	Note Added: 0034329
2013-11-02 11:14	Stephen Kelly	Status	backlog => resolved
2013-11-02 11:14	Stephen Kelly	Fixed in Version	=> CMake 2.8.11
2013-11-02 11:14	Stephen Kelly	Resolution	open => fixed
2014-06-02 08:37	Robert Maynard	Note Added: 0035993
2014-06-02 08:37	Robert Maynard	Status	resolved => closed