#2272 double definition for "struct timespec"

[thomas]

When I try to compile this file :

#include <unistd.h>
#include <pthread.h>

int main()
{
return 0;
}

I have the error :

In file included from a.c:2:0:
c:\mingw\include\pthread.h:320:8: error: redefinition of 'struct timespec'
 struct timespec {
        ^
In file included from c:\mingw\include\unistd.h:95:0,
                 from a.c:1:
c:\mingw\include\parts\time.h:65:8: note: originally defined here
 struct timespec

Adding :

 #define HAVE_STRUCT_TIMESPEC

after

 struct timespec
{
  /* Period is sum of tv_sec + tv_nsec; use fundamental integer types

   * to avoid 32-bit vs. 64-bit time_t ambiguity.
   */
  long long tv_sec;     /* seconds */
  long      tv_nsec;    /* nanoseconds */
};

in file "C:\MinGW\include\parts\time.h" correct the problem.

[Keith Marshall]

Arrrrrrrrrgh!!!!!!!! Please use the preview facility, and correct your markdown before posting, so I don't have to fix it later.

Anyway, I'm aware of this issue; it is a bug in pthreads-w32, (which doesn't have a configure script, so just makes arbitrary, and possibly bogus assumptions, without performing any requisite feature checks). Adding

#define HAVE_STRUCT_TIMESPEC

in <parts/time.h> is not a valid solution, (because it would pollute the user namespace). This needs to be fixed in pthreads-w32, a proper solution will require that to support proper build-time configuration, and propagation of that configuration to its installed headers.

Do please note, that if you are mixing a stock pre-built pthreads-w32 library along with mingwrt-3.21, there is likely a conflict between the struct timespec declared in <parts/time.h>, and the declaration assumed by the pthread library.

[Keith Marshall]

This issue should no longer arise, provided you use our pthreads-w32-2.10:
https://sourceforge.net/projects/mingw/files/MinGW/Base/pthreads-w32/pthreads-w32-2.10-pre-20160821-1/