Public bug reported:
Binary package hint: gcc-4.4
std::chrono::monotonic_clock in <chrono> can be defined differently
(typedef system_clock or proper monotonic_clock) based on the define
_GLIBCXX_USE_CLOCK_MONOTONIC.
The latter should be defined from the gcc configuration scrips based on
whether the clock_gettime supports monotonic clock or not.
Ubuntu Lucid obviously supports monotonic clock (see example below),
however _GLIBCXX_USE_CLOCK_MONOTONIC is not defined in
/usr/include/c++/4.4/x86_64-linux-gnu/bits/c++config.h.
---
#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include <string.h>
int
main ()
{
struct timespec tp;
int ret = clock_gettime(CLOCK_MONOTONIC, &tp);
if (ret < 0)
printf("%s\n", strerror(errno));
return ret;
}
$ gcc monotonic.c -o monotonic -lrt
** Affects: gcc-4.4 (Ubuntu)
Importance: Undecided
Status: New
--
c++0x: _GLIBCXX_USE_CLOCK_MONOTONIC is not defined on Ubuntu Lucid
https://bugs.launchpad.net/bugs/608164
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