Bug 1763325
| Summary: | argp.h kills __attribute__, causing gcc 4.8.5 with -std=c++ results in compile / link errors for __gthrw_pthread_mutex_* functions | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 7 | Reporter: | Frank Ch. Eigler <fche> | ||||||
| Component: | glibc | Assignee: | Florian Weimer <fweimer> | ||||||
| Status: | CLOSED ERRATA | QA Contact: | qe-baseos-tools-bugs | ||||||
| Severity: | unspecified | Docs Contact: | |||||||
| Priority: | unspecified | ||||||||
| Version: | 7.7 | CC: | ashankar, codonell, dj, fweimer, jakub, mcermak, mnewsome, ohudlick, pfrankli, skolosov | ||||||
| Target Milestone: | rc | Keywords: | Patch, Triaged | ||||||
| Target Release: | --- | ||||||||
| Hardware: | x86_64 | ||||||||
| OS: | Unspecified | ||||||||
| Whiteboard: | |||||||||
| Fixed In Version: | glibc-2.17-315.el7 | Doc Type: | No Doc Update | ||||||
| Doc Text: | Story Points: | --- | |||||||
| Clone Of: | Environment: | ||||||||
| Last Closed: | 2020-09-29 19:20:26 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: | 1782203 | ||||||||
| Attachments: |
|
||||||||
Something is doing #define __attribute__(x) or something similar before including the libstdc++ headers. That can't work. Created attachment 1627254 [details]
same, with -E -dD
from discussions with jakub: glibc-headers-2.17-292.el7.x86_64 /usr/include/argp.h: #ifndef __attribute__ /* This feature is available in gcc versions 2.5 and later. */ # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || \ defined __STRICT_ANSI__ # define __attribute__(Spec) /* empty */ # endif this bit in argp.h disables the __attribute__ mechanism that other system libraries rely on. The __STRICT_ANSI__ condition is probably unnecessary here. https://sourceware.org/bugzilla/show_bug.cgi?id=16907 appears to be this same bug. Please consider a backport. Upstream commit:
commit 2c820533c61fed175390bc6058afbbe42d2edc37
Author: Florian Weimer <fweimer>
Date: Thu Aug 18 11:15:42 2016 +0200
argp: Do not override GCC keywords with macros [BZ #16907]
glibc provides fallback definitions already. It is not necessary to
suppress warnings for unknown attributes because GCC does this
automatically for system headers.
This commit does not sync with gnulib because gnulib has started to use
_GL_* macros in the header file, which are arguably in the gnulib
implementation space and not suitable for an installed glibc header
file.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Low: glibc security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:3861 |
Created attachment 1627252 [details] gcc -E preprocessed form of a random snapshot of elfutils debuginfod attached .i file, compiled thusly: $ g++ -std=c++11 -g -O2 -c -o debuginfod.o debuginfod.i shows: /usr/include/c++/4.8.2/x86_64-redhat-linux/bits/gthr-default.h:115:37: warning: ‘int __gthrw_pthread_mutex_lock(pthread_mutex_t*) throw ()’ used but never defined [enabled by default] __gthrw(pthread_mutex_lock) ^ /usr/include/c++/4.8.2/x86_64-redhat-linux/bits/gthr-default.h:120:39: warning: ‘int __gthrw_pthread_mutex_unlock(pthread_mutex_t*) throw ()’ used but never defined [enabled by default] __gthrw(pthread_mutex_unlock) ^ linking fails with these gthr-relevant symbols: $ g++ -std=c++11 -g -O2 -o debuginfod debuginfod.i|& grep gthr [...] /tmp/cc92jQNh.o: In function `__gthread_mutex_lock': /usr/include/c++/4.8.2/x86_64-redhat-linux/bits/gthr-default.h:748: undefined reference to `__gthrw_pthread_mutex_lock(pthread_mutex_t*)' /usr/include/c++/4.8.2/x86_64-redhat-linux/bits/gthr-default.h:748: undefined reference to `__gthrw_pthread_mutex_lock(pthread_mutex_t*)' /tmp/cc92jQNh.o: In function `__gthread_mutex_unlock': [...]