Performing C SOURCE FILE Test HAS_O_TMPFILE failed with the following output:
Change Dir: /accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_21da0/fast"
make[1]: Entering directory `/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_21da0.dir/build.make CMakeFiles/cmTC_21da0.dir/build
make[2]: Entering directory `/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_21da0.dir/src.c.o
/accts/mlweber1/instance-3/output/host/bin/arc-linux-gcc --sysroot=/accts/mlweber1/instance-3/output/host/arc-buildroot-linux-uclibc/sysroot -D_GNU_SOURCE=1  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -matomic -Os -fvisibility=hidden -Wall -Wextra -Wno-unused-parameter -Wno-sign-compare -Wpedantic -DHAS_O_TMPFILE  -DNDEBUG   -o CMakeFiles/cmTC_21da0.dir/src.c.o   -c /accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp/src.c
/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp/src.c: In function 'main':
/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp/src.c:2:25: error: 'O_TMPFILE' undeclared (first use in this function); did you mean 'HAS_O_TMPFILE'?
 int main(void) { return O_TMPFILE; }
                         ^~~~~~~~~
                         HAS_O_TMPFILE
/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp/src.c:2:25: note: each undeclared identifier is reported only once for each function it appears in
make[2]: *** [CMakeFiles/cmTC_21da0.dir/src.c.o] Error 1
make[2]: Leaving directory `/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_21da0/fast] Error 2
make[1]: Leaving directory `/accts/mlweber1/instance-3/output/build/libiio-0.14/CMakeFiles/CMakeTmp'

Source file was:
#include <fcntl.h>
int main(void) { return O_TMPFILE; }