[Cmake-commits] CMake branch, master, updated. v3.12.1-495-ge04a023
This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "CMake". The branch, master has been updated via e04a023eabc9ec309d002a9acd887d79f65d4b84 (commit) from 6783fac20a060d0078a03775f179a0f020c53267 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log - https://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=e04a023eabc9ec309d002a9acd887d79f65d4b84 commit e04a023eabc9ec309d002a9acd887d79f65d4b84 Author: Kitware Robot AuthorDate: Thu Aug 30 00:01:09 2018 -0400 Commit: Kitware Robot CommitDate: Thu Aug 30 00:01:09 2018 -0400 CMake Nightly Date Stamp diff --git a/Source/CMakeVersion.cmake b/Source/CMakeVersion.cmake index 651ef61..e88f20e 100644 --- a/Source/CMakeVersion.cmake +++ b/Source/CMakeVersion.cmake @@ -1,5 +1,5 @@ # CMake version number components. set(CMake_VERSION_MAJOR 3) set(CMake_VERSION_MINOR 12) -set(CMake_VERSION_PATCH 20180829) +set(CMake_VERSION_PATCH 20180830) #set(CMake_VERSION_RC 1) --- Summary of changes: Source/CMakeVersion.cmake | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) hooks/post-receive -- CMake ___ Cmake-commits mailing list Cmake-commits@cmake.org https://cmake.org/mailman/listinfo/cmake-commits
Re: [CMake] Iterating over a generator expression list, specifically $ of an OBJECT library
Le mer. 29 août 2018 à 14:44, George PF a écrit : > > > > > My opinion (but I may be proven wrong by others) is that genex contains > > generator specific bits that cannot be **evaluated** > > until the build system is generated. Properties (on target, or > directory, > > or files) contains informations that is available as soon > > as the corresponding CMakeLists.txt part defining the object has been > > processed. > > That seems more like an internal cmake limitation. Though maybe on purpose > so > the scripts can not be tailored for just one backend. > I think this was a design choice thus the name "Generator" expression they are evaluated at generation time not configuration time and I don't think it's an internal cmake limitation, I think (but I may be wrong) that this "generation step" would happen for any generative build system. And there is more than that about "when" you'll know some var values. Some generators are supporting "multiple build configuration" like MSVC and Xcode so that the build output dir is "mangled" with a prefix **at build time** (since you can switch configuration after you have generated your project files). see e.g. https://cmake.org/cmake/help/latest/variable/CMAKE_CFG_INTDIR.html And the documentation says quite optimistically: "Generator expressions are > allowed > in the context of many target properties", a more restrictive phrasing - > "only works > with X / Y for reasons Z" would help there. I agree this could be clearer. Having a possibly exhaustive description of where genex may be used would be nice. May be it's worth a bug report with a proposal doc update? Genex support is added in places where it is useful (and possible I guess): https://gitlab.kitware.com/cmake/cmake/issues/15374 https://gitlab.kitware.com/cmake/cmake/issues/15785 And concerning having them "at configure time", there is open issue about "configuration expression": https://gitlab.kitware.com/cmake/cmake/issues/17962 -- Eric -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake
Re: [CMake] Iterating over a generator expression list, specifically $ of an OBJECT library
> I cc the list because I think you drop it inadvertently. Ah, thanks. I'll pay more attention to that now. > Le mar. 28 août 2018 à 16:18, George PF a écrit : > > > > Because generator expressions are not handled in every cmake construct: > > > > > https://cmake.org/cmake/help/v3.12/manual/cmake-generator-expressions.7.html > > > > > > genex is probably not handled in foreach. > > > > That is a harsh limitation, set() or list() also does not expand this > > expression. > > > > genex are evaluated during "Generation time" i.e. when CMake > produces/generates the specific build system > files (makefile, [build|rules].ninja, MSVC solution etc...). This is > convenient because some (most of) genex informations > may be generator specific (library file name, build artefact location, > etc...) > > https://stackoverflow.com/questions/46206495/cmake-generator-expressions > > set() , list(), foreach() are "running" at "CMake time" i.e. when cmake > runs and processes CMakeLists.txt and other cmake scripts > that is before "Generation time". > > > And the variable XYZ, when set via this indirection to TARGET_OBJECTS, > > > > add_library(lib12 SHARED $) > > get_property(XYZ TARGET lib12 PROPERTY SOURCES) > > > > is also not expanded yet. Is there a workaround regarding the generator > > expressions, or > > another way to get the TARGET_OBJECTS of an object library (and why is > > this hidden > > behind a generator and not available as a property)? > > > > My opinion (but I may be proven wrong by others) is that genex contains > generator specific bits that cannot be **evaluated** > until the build system is generated. Properties (on target, or directory, > or files) contains informations that is available as soon > as the corresponding CMakeLists.txt part defining the object has been > processed. That seems more like an internal cmake limitation. Though maybe on purpose so the scripts can not be tailored for just one backend. And the documentation says quite optimistically: "Generator expressions are allowed in the context of many target properties", a more restrictive phrasing - "only works with X / Y for reasons Z" would help there. -- Powered by www.kitware.com Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Kitware offers various services to support the CMake community. For more information on each offering, please visit: CMake Support: http://cmake.org/cmake/help/support.html CMake Consulting: http://cmake.org/cmake/help/consulting.html CMake Training Courses: http://cmake.org/cmake/help/training.html Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Follow this link to subscribe/unsubscribe: https://cmake.org/mailman/listinfo/cmake
