Determining if the include file sys/ucred.h exists failed with the following output:
Change Dir: /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp

Run Build Command:/usr/bin/make "cmTryCompileExec970050002/fast"
/usr/bin/make -f CMakeFiles/cmTryCompileExec970050002.dir/build.make CMakeFiles/cmTryCompileExec970050002.dir/build
make[1]: Entering directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
/usr/bin/cmake -E cmake_progress_report /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CMakeFiles 1
Building C object CMakeFiles/cmTryCompileExec970050002.dir/CheckIncludeFile.c.o
/usr/lib/ccache/cc    -o CMakeFiles/cmTryCompileExec970050002.dir/CheckIncludeFile.c.o   -c /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFile.c
/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:23: fatal error: sys/ucred.h: No such file or directory
 #include <sys/ucred.h>
                       ^
compilation terminated.
make[1]: *** [CMakeFiles/cmTryCompileExec970050002.dir/CheckIncludeFile.c.o] Error 1
make[1]: Leaving directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
make: *** [cmTryCompileExec970050002/fast] Error 2