use c11 thread emulate library on Mesa 3D Graphics Library

C11

my local gcc 4.9.2 is not support to "threads.h" yet.

$ make
gcc -Wall -std=c11 main.c -pthread
main.c:2:21: fatal error: threads.h: No such file or directory
 #include <threads.h>
                     ^
compilation terminated.
Makefile:5: recipe for target 'test' failed
make: *** [test] Error 1
$ gcc --version
gcc (Debian 4.9.2-10) 4.9.2
Copyright (C) 2014 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

but Mesa 3D included emulate thread library. and tried it.

source code to github

misc-lang-snippet/c/c11threads at master · murasesyuka/misc-lang-snippet · GitHub

run result

$ ./a.out 
thrd_current()vim is 139907333428992
thrd_current()vim is 139907341821696
0 : 0
1 : 2
2 : 1
3 : 0
4 : 2
5 : 1
thrd_current()vim is 139907358607104
6 : 2
7 : 1
8 : 0
thrd_current()vim is 139907350214400
9 : 2
10 : 1
11 : 0