| Summary: | realtime clock functions need to link with -lrt | |||
|---|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | Jeff Bastian <jbastian> | |
| Component: | man-pages-overrides | Assignee: | Peter Schiffer <pschiffe> | |
| Status: | CLOSED ERRATA | QA Contact: | BaseOS QE - Apps <qe-baseos-apps> | |
| Severity: | low | Docs Contact: | ||
| Priority: | medium | |||
| Version: | 6.1 | CC: | ddumas, ovasik | |
| Target Milestone: | rc | Keywords: | ManPageChange | |
| Target Release: | --- | |||
| Hardware: | All | |||
| OS: | Linux | |||
| Whiteboard: | ||||
| Fixed In Version: | Doc Type: | Bug Fix | ||
| Doc Text: |
Prior to this update, the clock_gettime(2), clock_getres(2), and clock_nanosleep(2) manual pages did not mention the "-lrt" option. With this update, the "-lrt" option is now described in the aforementioned manual pages.
|
Story Points: | --- | |
| Clone Of: | ||||
| : | 735789 (view as bug list) | Environment: | ||
| Last Closed: | 2011-12-06 11:48:36 UTC | Type: | --- | |
| Regression: | --- | Mount Type: | --- | |
| Documentation: | --- | CRM: | ||
| Verified Versions: | Category: | --- | ||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | ||
| Cloudforms Team: | --- | Target Upstream Version: | ||
| Bug Depends On: | ||||
| Bug Blocks: | 735789, 748554 | |||
There's something strange with the RHEL 6 man pages: the upstream man-pages-3.22.tar.gz contains the linking notes and was written in 2009, but the RHEL 6 version of the man page is from 2004. The RHEL 6 man-pages-3.22-17.el6.src.rpm contains a man-pages_syscalls-01.tar.bz2 which overrides a number of the man pages including the clock_* pages with much older versions of the pages. Is this intentional? man-pages_syscalls-01.tar.bz2 is from old BZ #159225, when not all man pages was included in upstream tarball. It should be revised and irrelevant man pages removed. For now, I'll fix four clock_* functions in MPO process in RHEL-6.2, rest when man-pages component will be updated in RHEL.
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New Contents:
Prior to this update, the clock_gettime(2), clock_getres(2), and clock_nanosleep(2) manual pages did not mention the "-lrt" option. With this update, the "-lrt" option is now described in the aforementioned manual pages.
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, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2011-1571.html |
Description of problem: The clock_gettime(2), clock_settime(2), clock_getres(2) and clock_nanosleep(2) man pages do not mention the fact that you must link to the librt library (with -lrt command line option) to use them. Without -lrt, the compile fails: $ gcc test.c /tmp/ccyoU0Vi.o: In function `getustime': test.c:(.text+0x36): undefined reference to `clock_gettime' collect2: ld returned 1 exit status The latest version of the man page in Fedora 15 does note this fact in the SYNOPSYS section: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SYNOPSIS #include <time.h> int clock_getres(clockid_t clk_id, struct timespec *res); int clock_gettime(clockid_t clk_id, struct timespec *tp); int clock_settime(clockid_t clk_id, const struct timespec *tp); Link with -lrt. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Please update the realtime clock function man pages to note the linking options. Version-Release number of selected component (if applicable): man-pages-3.22-17.el6.noarch How reproducible: every time Steps to Reproduce: 1. man clock_gettime Actual results: no mention of -lrt link option Expected results: note on linking with -lrt