Performing C SOURCE FILE Test HAS_O_TMPFILE failed with the following output:
Change Dir: /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_6402b/fast"
make[1]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_6402b.dir/build.make CMakeFiles/cmTC_6402b.dir/build
make[2]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_6402b.dir/src.c.o
/home/buildroot/build/instance-0/output/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/build/instance-0/output/host/arm-buildroot-linux-gnueabi/sysroot -D_GNU_SOURCE=1  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic -DHAS_O_TMPFILE  -DNDEBUG   -o CMakeFiles/cmTC_6402b.dir/src.c.o   -c /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/src.c
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/src.c: In function 'main':
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/src.c:2:25: error: 'O_TMPFILE' undeclared (first use in this function)
 int main(void) { return O_TMPFILE; }
                         ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/src.c:2:25: note: each undeclared identifier is reported only once for each function it appears in
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/src.c:2:1: warning: control reaches end of non-void function [-Wreturn-type]
 int main(void) { return O_TMPFILE; }
 ^
CMakeFiles/cmTC_6402b.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_6402b.dir/src.c.o' failed
make[2]: *** [CMakeFiles/cmTC_6402b.dir/src.c.o] Error 1
make[2]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_6402b/fast' failed
make[1]: *** [cmTC_6402b/fast] Error 2
make[1]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'

Source file was:
#include <fcntl.h>
int main(void) { return O_TMPFILE; }
Determining if the pthread_create exist failed with the following output:
Change Dir: /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_99384/fast"
make[1]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_99384.dir/build.make CMakeFiles/cmTC_99384.dir/build
make[2]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_99384.dir/CheckSymbolExists.c.o
/home/buildroot/build/instance-0/output/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/build/instance-0/output/host/arm-buildroot-linux-gnueabi/sysroot -D_GNU_SOURCE=1  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic   -DNDEBUG   -o CMakeFiles/cmTC_99384.dir/CheckSymbolExists.c.o   -c /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/CheckSymbolExists.c
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In function 'main':
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:11: warning: ISO C forbids conversion of function pointer to object pointer type [-Wpedantic]
   return ((int*)(&pthread_create))[argc];
           ^
Linking C executable cmTC_99384
/home/buildroot/build/instance-0/output/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_99384.dir/link.txt --verbose=1
/home/buildroot/build/instance-0/output/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/build/instance-0/output/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic   -DNDEBUG    -rdynamic CMakeFiles/cmTC_99384.dir/CheckSymbolExists.c.o  -o cmTC_99384 
CMakeFiles/cmTC_99384.dir/CheckSymbolExists.c.o: In function `main':
CheckSymbolExists.c:(.text.startup+0x8): undefined reference to `pthread_create'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_99384.dir/build.make:97: recipe for target 'cmTC_99384' failed
make[2]: *** [cmTC_99384] Error 1
make[2]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_99384/fast' failed
make[1]: *** [cmTC_99384/fast] Error 2
make[1]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'

File /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <pthread.h>

int main(int argc, char** argv)
{
  (void)argv;
#ifndef pthread_create
  return ((int*)(&pthread_create))[argc];
#else
  (void)argc;
  return 0;
#endif
}

Determining if the function pthread_create exists in the pthreads failed with the following output:
Change Dir: /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_a2d17/fast"
make[1]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_a2d17.dir/build.make CMakeFiles/cmTC_a2d17.dir/build
make[2]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_a2d17.dir/CheckFunctionExists.c.o
/home/buildroot/build/instance-0/output/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/build/instance-0/output/host/arm-buildroot-linux-gnueabi/sysroot -D_GNU_SOURCE=1  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic -DCHECK_FUNCTION_EXISTS=pthread_create  -DNDEBUG   -o CMakeFiles/cmTC_a2d17.dir/CheckFunctionExists.c.o   -c /home/buildroot/build/instance-0/output/host/share/cmake-3.8/Modules/CheckFunctionExists.c
Linking C executable cmTC_a2d17
/home/buildroot/build/instance-0/output/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_a2d17.dir/link.txt --verbose=1
/home/buildroot/build/instance-0/output/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/build/instance-0/output/host/arm-buildroot-linux-gnueabi/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic -DCHECK_FUNCTION_EXISTS=pthread_create  -DNDEBUG    -rdynamic CMakeFiles/cmTC_a2d17.dir/CheckFunctionExists.c.o  -o cmTC_a2d17 -lpthreads 
/home/buildroot/build/instance-0/output/host/opt/ext-toolchain/bin/../lib/gcc/arm-none-linux-gnueabi/4.8.3/../../../../arm-none-linux-gnueabi/bin/ld: cannot find -lpthreads
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_a2d17.dir/build.make:97: recipe for target 'cmTC_a2d17' failed
make[2]: *** [cmTC_a2d17] Error 1
make[2]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_a2d17/fast' failed
make[1]: *** [cmTC_a2d17/fast] Error 2
make[1]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'


Determining size of struct usb_functionfs_descs_head_v2 failed with the following output:
Change Dir: /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_140d4/fast"
make[1]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_140d4.dir/build.make CMakeFiles/cmTC_140d4.dir/build
make[2]: Entering directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_140d4.dir/FUNCTIONFS_V2.c.o
/home/buildroot/build/instance-0/output/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/build/instance-0/output/host/arm-buildroot-linux-gnueabi/sysroot -D_GNU_SOURCE=1  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic   -DNDEBUG   -o CMakeFiles/cmTC_140d4.dir/FUNCTIONFS_V2.c.o   -c /home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:18:22: error: invalid application of 'sizeof' to incomplete type 'struct usb_functionfs_descs_head_v2'
 #define SIZE (sizeof(struct usb_functionfs_descs_head_v2))
                      ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:20:12: note: in expansion of macro 'SIZE'
   ('0' + ((SIZE / 10000)%10)),
            ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:18:22: error: invalid application of 'sizeof' to incomplete type 'struct usb_functionfs_descs_head_v2'
 #define SIZE (sizeof(struct usb_functionfs_descs_head_v2))
                      ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:21:12: note: in expansion of macro 'SIZE'
   ('0' + ((SIZE / 1000)%10)),
            ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:18:22: error: invalid application of 'sizeof' to incomplete type 'struct usb_functionfs_descs_head_v2'
 #define SIZE (sizeof(struct usb_functionfs_descs_head_v2))
                      ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:22:12: note: in expansion of macro 'SIZE'
   ('0' + ((SIZE / 100)%10)),
            ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:18:22: error: invalid application of 'sizeof' to incomplete type 'struct usb_functionfs_descs_head_v2'
 #define SIZE (sizeof(struct usb_functionfs_descs_head_v2))
                      ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:23:12: note: in expansion of macro 'SIZE'
   ('0' + ((SIZE / 10)%10)),
            ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:18:22: error: invalid application of 'sizeof' to incomplete type 'struct usb_functionfs_descs_head_v2'
 #define SIZE (sizeof(struct usb_functionfs_descs_head_v2))
                      ^
/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:24:12: note: in expansion of macro 'SIZE'
   ('0' +  (SIZE    % 10)),
            ^
CMakeFiles/cmTC_140d4.dir/build.make:65: recipe for target 'CMakeFiles/cmTC_140d4.dir/FUNCTIONFS_V2.c.o' failed
make[2]: *** [CMakeFiles/cmTC_140d4.dir/FUNCTIONFS_V2.c.o] Error 1
make[2]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_140d4/fast' failed
make[1]: *** [cmTC_140d4/fast] Error 2
make[1]: Leaving directory '/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CMakeTmp'

/home/buildroot/build/instance-0/output/build/libiio-0.10/CMakeFiles/CheckTypeSize/FUNCTIONFS_V2.c:
#include <sys/types.h>
#include <stdint.h>
#include <stddef.h>
#include "linux/usb/functionfs.h"


#undef KEY
#if defined(__i386)
# define KEY '_','_','i','3','8','6'
#elif defined(__x86_64)
# define KEY '_','_','x','8','6','_','6','4'
#elif defined(__ppc__)
# define KEY '_','_','p','p','c','_','_'
#elif defined(__ppc64__)
# define KEY '_','_','p','p','c','6','4','_','_'
#endif

#define SIZE (sizeof(struct usb_functionfs_descs_head_v2))
char info_size[] =  {'I', 'N', 'F', 'O', ':', 's','i','z','e','[',
  ('0' + ((SIZE / 10000)%10)),
  ('0' + ((SIZE / 1000)%10)),
  ('0' + ((SIZE / 100)%10)),
  ('0' + ((SIZE / 10)%10)),
  ('0' +  (SIZE    % 10)),
  ']',
#ifdef KEY
  ' ','k','e','y','[', KEY, ']',
#endif
  '\0'};

#ifdef __CLASSIC_C__
int main(argc, argv) int argc; char *argv[];
#else
int main(int argc, char *argv[])
#endif
{
  int require = 0;
  require += info_size[argc];
  (void)argv;
  return require;
}