Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1803351
| Summary: | mesa builds fail with llvm 10.0.0 rc1/rc2 on ppc64le | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Pete Walter <walter.pete> |
| Component: | llvm | Assignee: | Tom Stellard <tstellar> |
| Status: | CLOSED RAWHIDE | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 32 | CC: | ajax, dan, dmalcolm, jakub, jistone, klember, scottt.tw, sean, sguelton, siddharth.kde, tstellar |
| Target Milestone: | --- | Keywords: | Reopened |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | mesa-20.0.0-2.fc32 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-02-26 17:05:44 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: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1071880 | ||
|
Description
Pete Walter
2020-02-15 12:26:57 UTC
the errors start with
In file included from /usr/include/llvm/IR/Module.h:19,
from ../src/gallium/state_trackers/clover/llvm/codegen.hpp:35,
from ../src/gallium/state_trackers/clover/llvm/codegen/bitcode.cpp:34:
/usr/include/llvm/ADT/STLExtras.h:559:49: error: 'std::index_sequence' has not been declared
559 | template <size_t... Ns> value_type deref(std::index_sequence<Ns...>) const {
| ^~~~~~~~~~~~~~
/usr/include/llvm/ADT/STLExtras.h:559:63: error: expected ',' or '...' before '<' token
559 | template <size_t... Ns> value_type deref(std::index_sequence<Ns...>) const {
| ^
/usr/include/llvm/ADT/STLExtras.h:564:36: error: 'std::index_sequence' has not been declared
564 | decltype(iterators) tup_inc(std::index_sequence<Ns...>) const {
| ^~~~~~~~~~~~~~
/usr/include/llvm/ADT/STLExtras.h:564:50: error: expected ',' or '...' before '<' token
564 | decltype(iterators) tup_inc(std::index_sequence<Ns...>) const {
| ^
/usr/include/llvm/ADT/STLExtras.h:569:36: error: 'std::index_sequence' has not been declared
so my first guess is a missing #include ...
This looks like a bug in the mesa build. On ppc64le it's compiling with -std=gnu++11, but on other arches it is compiling with -std=gnu++14. LLVM uses c++14 features, so compiling with -std=gnu++11 won't work. Ahh, that makes sense. Indeed, mesa has this in meson.build:
if host_machine.cpu_family().startswith('ppc') and cpp.compiles('''
#if !defined(__VEC__) || !defined(__ALTIVEC__)
#error "AltiVec not enabled"
#endif''',
name : 'Altivec')
clover_cpp_std += ['cpp_std=gnu++11']
endif
... which ends up forcing gnu++11 on ppc arches.
I went ahead and hacked around this in https://src.fedoraproject.org/rpms/mesa/c/bd392f431cc481ea754581d3052959bb7454ca5b (In reply to Kalev Lember from comment #3) > Ahh, that makes sense. Indeed, mesa has this in meson.build: > > if host_machine.cpu_family().startswith('ppc') and cpp.compiles(''' > #if !defined(__VEC__) || !defined(__ALTIVEC__) > #error "AltiVec not enabled" > #endif''', > name : 'Altivec') > clover_cpp_std += ['cpp_std=gnu++11'] > endif > > ... which ends up forcing gnu++11 on ppc arches. which is probably from times, when the default was c++11 and using the altivec required gnu++11, because of some gnu extensions |