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| ID | Project | Category | View Status | Date Submitted | Last Update | ||||
| 0012458 | CMake | CMake | public | 2011-09-14 19:27 | 2012-04-02 10:10 | ||||
| Reporter | Stephen Kelly | ||||||||
| Assigned To | David Cole | ||||||||
| Priority | normal | Severity | minor | Reproducibility | always | ||||
| Status | closed | Resolution | no change required | ||||||
| Platform | OS | OS Version | |||||||
| Product Version | CMake 2.8.5 | ||||||||
| Target Version | CMake 2.8.7 | Fixed in Version | CMake 2.8.7 | ||||||
| Summary | 0012458: cmake_minimum_required clears policies | ||||||||
| Description | The attached project contains the line cmake_policy(SET CMP0017 NEW) but also warns about the policy not being set: $ cmake .. CMake Warning (dev) at /usr/share/cmake-2.8/Modules/FeatureSummary.cmake:112 (INCLUDE): File /usr/share/cmake-2.8/Modules/FeatureSummary.cmake includes /home/stephen/dev/src/playground/cmakebugs/CMakeParseArguments.cmake (found via CMAKE_MODULE_PATH) which shadows /usr/share/cmake-2.8/Modules/CMakeParseArguments.cmake. This may cause errors later on . Policy CMP0017 is not set: Prefer files from the CMake module directory when including from there. Run "cmake --help-policy CMP0017" for policy details. Use the cmake_policy command to set the policy and suppress this warning. Call Stack (most recent call first): sub1/CMakeLists.txt:4 (include) This warning is for project developers. Use -Wno-dev to suppress it. -- Configuring done -- Generating done -- Build files have been written to: /home/stephen/dev/src/playground/cmakebugs/build The warning does not appear if the cmake_minimum_required line in sub1/CMakeLists.txt is removed. The documentation of cmake_minimum_required notes that the policy is implicitly set to the cmake version specified. However I still found it surprising that it clears all existing policies. If this is intentional, it should probably be in the cmake_minimum_required documentation. | ||||||||
| Tags | No tags attached. | ||||||||
| Attached Files |  policybug.tar.gz [^] (378 bytes) 2011-09-14 19:27 | ||||||||
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| Notes | |
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(0027425) David Cole (manager) 2011-09-14 22:31 |
This behavior is completely intentional, and we will not be changing it. I'll take a look at the documentation to see if I can clarify it, but this is not urgent... We won't hold the 2.8.6 release for a fix on this, but we'll get it in for next time. |
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(0027646) David Cole (manager) 2011-10-25 23:07 |
The documentation of cmake_minimum_required states: ----- When a version higher than 2.4 is specified the command implicitly invokes cmake_policy(VERSION major[.minor[.patch[.tweak]]]) ----- So, naturally, you have to look at the documentation of cmake_policy(VERSION ...) to understand what happens there. And that documentation is quite explicit about setting all policies as of the VERSION number to NEW, and later policies to *unset* (unless variable CMAKE_POLICY_DEFAULT_CMP<NNNN> sets a default) Not sure how to make it more clear without repeating ourselves... Suggestions for how to make it more clear would be welcome. If no reasonable suggestions arrive in this issue in the next week or so, I'll resolve it as "no change required..." |
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(0027817) David Cole (manager) 2011-11-17 16:26 |
After more than three weeks with no additional comments, closing as "no change required," as promised. If anyone has further suggestions for clarifying the documentation here, please feel free to re-open. |
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(0029043) David Cole (manager) 2012-04-02 10:10 |
Closing resolved issues that have not been updated in more than 4 months. |
| Notes |
| Issue History | |||
| Date Modified | Username | Field | Change |
| 2011-09-14 19:27 | Stephen Kelly | New Issue | |
| 2011-09-14 19:27 | Stephen Kelly | File Added: policybug.tar.gz | |
| 2011-09-14 22:29 | David Cole | Assigned To | => David Cole |
| 2011-09-14 22:29 | David Cole | Status | new => assigned |
| 2011-09-14 22:31 | David Cole | Note Added: 0027425 | |
| 2011-10-25 23:07 | David Cole | Note Added: 0027646 | |
| 2011-10-27 00:05 | David Cole | Target Version | => CMake 2.8.7 |
| 2011-11-17 16:26 | David Cole | Note Added: 0027817 | |
| 2011-11-17 16:26 | David Cole | Status | assigned => resolved |
| 2011-11-17 16:26 | David Cole | Fixed in Version | => CMake 2.8.7 |
| 2011-11-17 16:26 | David Cole | Resolution | open => no change required |
| 2012-04-02 10:10 | David Cole | Note Added: 0029043 | |
| 2012-04-02 10:10 | David Cole | Status | resolved => closed |
| Issue History |
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