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IDProjectCategoryView StatusDate SubmittedLast Update
0015405CMakeCMakepublic2015-02-13 10:492016-06-10 14:31
ReporterCrumblingStatue 
Assigned ToKitware Robot 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionmoved 
Platformx86_64OSLinuxOS Version
Product VersionCMake 3.1.3 
Target VersionFixed in Version 
Summary0015405: Undefined behavior when introducing CMAKE_EXTRA_GENERATOR over a plain generator
DescriptionIf I generate a CodeBlocks build over a plain one, the generated .cbp file is missing entries that are present when generating a CodeBlocks build in a clean directory.

The question is, is it valid to introduce extra generators over a plain one, and this is a bug with the CodeBlocks generator, or is it invalid, in which case it should fail with a descriptive error message instead of silently generating incorrect results.
Steps To Reproduce
Additional Information
TagsNo tags attached.
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Attached Filesdiff cbp.diff (1,911) 2015-02-14 04:08
https://public.kitware.com/Bug/file/5384/cbp.diff
Issue History
Date ModifiedUsernameFieldChange
2015-02-13 10:49CrumblingStatueNew Issue
2015-02-13 13:08David ColeNote Added: 0037971
2015-02-13 13:27Nils GladitzNote Added: 0037972
2015-02-13 16:32Alex NeundorfNote Added: 0037973
2015-02-13 16:33Alex NeundorfNote Added: 0037974
2015-02-14 04:08CrumblingStatueFile Added: cbp.diff
2015-02-14 04:10CrumblingStatueNote Added: 0037977
2016-06-10 14:29Kitware RobotNote Added: 0042715
2016-06-10 14:29Kitware RobotStatusnew => resolved
2016-06-10 14:29Kitware RobotResolutionopen => moved
2016-06-10 14:29Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0037971)
David Cole   
2015-02-13 13:08   
It's certainly unexpected, isn't it? If you change generators, the expectation is that you will start with a clean build tree...
(0037972)
Nils Gladitz   
2015-02-13 13:27   
CMake fails if CMAKE_GENERATOR changes but currently allows CMAKE_EXTRA_GENERATOR to change.

The questions is if this is an oversight or if it is intentional / by design.
(0037973)
Alex Neundorf   
2015-02-13 16:32   
It's an oversight.
(0037974)
Alex Neundorf   
2015-02-13 16:33   
OTOH I'm not quite sure what should go wrong.

So after generating a project you added -DCMAKE_EXTRA_GENERATOR=CodeBlocks, and then got a cbp file where some things were missing ?
I never tried that.
(0037977)
CrumblingStatue   
2015-02-14 04:10   
Actually, -DCMAKE_EXTRA_GENERATOR=CodeBlocks over a plain build works correctly.

The way I did instead is to generate -G 'CodeBlocks - Unix Makefiles` over a plain `Unix Makefiles` build.

I attached a diff that shows the missing includes in that case.
(0042715)
Kitware Robot   
2016-06-10 14:29   
Resolving issue as `moved`.

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