Bug 1531678
| Summary: | CMAKE_LIBRARY_ARCHITECTURE is empty | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Roman Tsisyk <roman> |
| Component: | cmake | Assignee: | Björn 'besser82' Esser <besser82> |
| Status: | CLOSED NOTABUG | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | rawhide | CC: | besser82, jreznik, orion, rdieter, walter.pete |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2018-01-14 16:08:44 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
As explained in the Cmake documentation [1], this is set only, if the compiler reports subdir triplets[2] as the implicit linker search path[3] for multi-arch.
We do not use such arch-triplets inside of %{_libdir} in Fedora nor RHEL, so this is expected not to be set. AFAIK, this has been implemented for Debian and Ubuntu, as they do multi-arch is way.
[1] https://cmake.org/cmake/help/v3.10/variable/CMAKE_LIBRARY_ARCHITECTURE.html
[2] https://cmake.org/cmake/help/v3.10/variable/CMAKE_LANG_LIBRARY_ARCHITECTURE.html#variable:CMAKE_<LANG>_LIBRARY_ARCHITECTURE
[3] https://cmake.org/cmake/help/v3.10/variable/CMAKE_LIBRARY_ARCHITECTURE_REGEX.html#index-0-variable:CMAKE_<LANG>_LIBRARY_ARCHITECTURE
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Description of problem: CMake's internal compiler checks doesn't detect CMAKE_LIBRARY_ARCHITECTURE properly on Fedora. Version-Release number of selected component (if applicable): Name : cmake Version : 3.10.1 Release : 8.fc28 How reproducible: Steps to Reproduce: 1. Create an empty CMake project: project (TestCase C CXX) cmake_minimum_required (VERSION 2.8) message(STATUS "CMAKE_LIBRARY_ARCHITECTURE ${CMAKE_LIBRARY_ARCHITECTURE}") 2. cmake . Actual results: -- The C compiler identification is GNU 7.2.1 -- The CXX compiler identification is GNU 7.2.1 -- Check for working C compiler: /bin/cc -- Check for working C compiler: /bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /bin/c++ -- Check for working CXX compiler: /bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- CMAKE_LIBRARY_ARCHITECTURE <!-- EMPTY -- Configuring done -- Generating done Expected results: -- The C compiler identification is GNU 7.2.1 -- The CXX compiler identification is GNU 7.2.1 -- Check for working C compiler: /bin/cc -- Check for working C compiler: /bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /bin/c++ -- Check for working CXX compiler: /bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- CMAKE_LIBRARY_ARCHITECTURE x86_64-redhat-linux <!-- non-empty -- Configuring done -- Generating done Additional info: From /usr/share/cmake/Modules/CMakeDetermineCompilerABI.cmake 48 # Match multiarch library directory names. 49 set(CMAKE_LIBRARY_ARCHITECTURE_REGEX "[a-z0-9_]+(-[a-z0-9_]+)?-linux-gnu[a-z0-9_]*") 112 # Detect library architecture directory name. 113 if(CMAKE_LIBRARY_ARCHITECTURE_REGEX) 114 foreach(dir ${implicit_dirs}) 115 if("${dir}" MATCHES "/lib/${CMAKE_LIBRARY_ARCHITECTURE_REGEX}$") 116 get_filename_component(arch "${dir}" NAME) 117 set(CMAKE_${lang}_LIBRARY_ARCHITECTURE "${arch}" PARENT_SCOPE) 119 break() 120 endif() 121 endforeach() 122 endif() Fedora uses "x86_64-redhat-linux" compiler triplet which is not matched by "[a-z0-9_]+(-[a-z0-9_]+)?-linux-gnu[a-z0-9_]*". I suggest to patch CMAKE_LIBRARY_ARCHITECTURE_REGEX.