Compilation error for using struct itimerspec

Question

I am trying to write a timer in C using timerfd_create() and timer_settime(). I am using CLOCK_MONOTONIC. But though i include these header files,

#include <sys/timerfd.h>
#include <sys/time.h>
#include <sys/types.h>

struct itimerspec timerValue; //This is how i defined the structure
//some code
g_fdRetryTimer = timerfd_create(CLOCK_MONOTONIC, 0);

I am consistently getting the following compilation errors.

error: storage size of ‘timerValue’ isn’t known
error: ‘CLOCK_MONOTONIC’ undeclared (first use in this function)
error: (Each undeclared identifier is reported only once
error: for each function it appears in.)

Please help! Thanks.

Please show your compile command with flags. – Martin May 11 '15 at 18:42 — Martin, May 11 '15 at 18:42
i used gcc ctimer.c -o ctimer. – aniztar May 11 '15 at 18:52 — aniztar, May 11 '15 at 18:52

score 0 · Answer 1 · edited May 23 '17 at 12:21

0

gcc < 5.1.0 default standard is -std=gnu90. Version 5.1.0, changed the default from -std=gnu90 to -std=gnu11.

You should compile your code with -std=gnu99 to have the identifier CLOCK_MONOTONIC available.

This answer might provide more details.

edited May 23 '17 at 12:21

Community

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answered May 11 '15 at 19:02

Martin

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Compilation error for using struct itimerspec

1 Answers1