Determining if the uuid_generate exist failed with the following output:
Change Dir: /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_50298/fast"
make[1]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_50298.dir/build.make CMakeFiles/cmTC_50298.dir/build
make[2]: Entering directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_50298.dir/CheckSymbolExists.c.o
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/x86_64-ctng_locales-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/x86_64-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG   -o CMakeFiles/cmTC_50298.dir/CheckSymbolExists.c.o   -c /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp/CheckSymbolExists.c
Linking C executable cmTC_50298
/usr/bin/cmake -E cmake_link_script CMakeFiles/cmTC_50298.dir/link.txt --verbose=1
/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/bin/x86_64-ctng_locales-linux-gnu-gcc  --sysroot=/home/rclinux/rc-buildroot-test/scripts/instance-1/output/host/x86_64-buildroot-linux-gnu/sysroot -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG    CMakeFiles/cmTC_50298.dir/CheckSymbolExists.c.o  -o cmTC_50298 -rdynamic 
CMakeFiles/cmTC_50298.dir/CheckSymbolExists.c.o: In function `main':
CheckSymbolExists.c:(.text.startup+0x6): undefined reference to `uuid_generate'
collect2: error: ld returned 1 exit status
CMakeFiles/cmTC_50298.dir/build.make:97: recipe for target 'cmTC_50298' failed
make[2]: *** [cmTC_50298] Error 1
make[2]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp'
Makefile:126: recipe for target 'cmTC_50298/fast' failed
make[1]: *** [cmTC_50298/fast] Error 2
make[1]: Leaving directory '/home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp'

File /home/rclinux/rc-buildroot-test/scripts/instance-1/output/build/qpid-proton-0.9.1/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
/* */
#include <uuid/uuid.h>

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