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IDProjectCategoryView StatusDate SubmittedLast Update
0015852CMake(No Category)public2015-11-19 08:452016-06-10 14:21
ReporterA. Klitzing 
Assigned ToBrad King 
PrioritynormalSeveritymajorReproducibilityalways
StatusclosedResolutionfixed 
PlatformOSOS Version
Product VersionCMake 3.4 
Target VersionCMake 3.4.1Fixed in VersionCMake 3.4.1 
Summary0015852: CMAKE_CXX_STANDARD broken since CMake 3.4.0 for toolchain files using CMakeForceCompiler
DescriptionWe use the Android NDK/SDK and CMake (with Toolchain file [1]) to build our program.
If we build our program with CMake 3.4.0 we will get compiler errors that we need to enable "-std=c++11 or -std=gnu++11". If we switch back to CMake 3.3.2 the flags will be defined by CMake and the build works.

In our cmake files:
    SET(CMAKE_CXX_STANDARD 11)
    SET(CMAKE_CXX_STANDARD_REQUIRED ON)


[1] https://github.com/taka-no-me/android-cmake [^]
Additional Information-- ANDROID_NDK_RELEASE: r10e
-- ANDROID_ABI: armeabi-v7a
-- ANDROID_NATIVE_API_LEVEL: 18
-- ANDROID_TOOLCHAIN_ROOT: /opt/android-ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
-- ANDROID_SYSROOT: /opt/android-ndk/platforms/android-18/arch-arm
-- ANDROID_TOOLCHAIN_NAME: arm-linux-androideabi-4.9
TagsNo tags attached.
Attached Files

 Relationships
has duplicate 0016004closed CMAKE_CXX_STANDARD and CMAKE_CXX_EXTENSIONS not working for crosscompilers 

  Notes
(0039882)
Brad King (manager)
2015-11-19 09:46

 Bisects to here:

 Project: Don't require computed default dialect if compiler was forced.
 https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=d1375851 [^]
(0039883)
Brad King (manager)
2015-11-19 09:50

 See discussion here:

 http://thread.gmane.org/gmane.comp.programming.tools.cmake.devel/14410/focus=14490 [^]

Basically CMakeForceCompiler cannot be used with compile features or CXX_STANDARD reliably. AFAIK there is no reason that the Android compilers need to be enabled using CMakeForceCompiler. The toolchain file should be taught not to use it.
(0039884)
Brad King (manager)
2015-11-19 10:27

 As discussed in the thread linked in 0015852:0039883, CMakeForceCompiler has been deprecated in post-3.4 CMake development:

 CMakeForceCompiler: Deprecate this module and its macros
 https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=ed77504d [^]

Therefore toolchain files should be ported away from using CMakeForceCompiler.

Meanwhile I've fixed the immediate issue:

 Project: Guess default standard dialect if compiler was forced
 https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=441dba80 [^]
(0039885)
Brad King (manager)
2015-11-19 10:27

 I've queued this fix for merge to 'release' for inclusion in 3.4.1.
(0041237)
Kitware Robot (administrator)
2016-06-10 14:21

 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
2015-11-19 08:45 A. Klitzing New Issue
2015-11-19 08:59 Brad King Target Version => CMake 3.4.1
2015-11-19 09:46 Brad King Note Added: 0039882
2015-11-19 09:50 Brad King Note Added: 0039883
2015-11-19 09:50 Brad King Target Version CMake 3.4.1 =>
2015-11-19 09:52 Brad King OS Android NDK =>
2015-11-19 09:52 Brad King Platform Android =>
2015-11-19 09:52 Brad King Summary CMAKE_CXX_STANDARD broken since CMake 3.4.0 for Android => CMAKE_CXX_STANDARD broken since CMake 3.4.0 for toolchain files using CMakeForceCompiler
2015-11-19 10:27 Brad King Note Added: 0039884
2015-11-19 10:27 Brad King Note Added: 0039885
2015-11-19 10:27 Brad King Assigned To => Brad King
2015-11-19 10:27 Brad King Status new => resolved
2015-11-19 10:27 Brad King Resolution open => fixed
2015-11-19 10:27 Brad King Fixed in Version => CMake 3.4.1
2015-11-19 10:27 Brad King Target Version => CMake 3.4.1
2016-03-04 04:36 Rolf Eike Beer Relationship added has duplicate 0016004
2016-06-10 14:21 Kitware Robot Note Added: 0041237
2016-06-10 14:21 Kitware Robot Status resolved => closed

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