Determining if the include file execinfo.h exists failed with the following output:
Change Dir: /tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_461d7/fast && make[1]: Entering directory '/tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp'
/usr/bin/make -f CMakeFiles/cmTC_461d7.dir/build.make CMakeFiles/cmTC_461d7.dir/build
make[2]: Entering directory '/tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_461d7.dir/CheckIncludeFile.c.o
/tmp/instance-1/output-1/host/bin/riscv64-linux-gcc --sysroot=/tmp/instance-1/output-1/host/riscv64-buildroot-linux-musl/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os   -DNDEBUG   -o CMakeFiles/cmTC_461d7.dir/CheckIncludeFile.c.o   -c /tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp/CheckIncludeFile.c
/tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp/CheckIncludeFile.c:1:10: fatal error: execinfo.h: No such file or directory
    1 | #include <execinfo.h>
      |          ^~~~~~~~~~~~
compilation terminated.
make[2]: *** [CMakeFiles/cmTC_461d7.dir/build.make:66: CMakeFiles/cmTC_461d7.dir/CheckIncludeFile.c.o] Error 1
make[2]: Leaving directory '/tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:121: cmTC_461d7/fast] Error 2
make[1]: Leaving directory '/tmp/instance-1/output-1/build/domoticz-2020.1/CMakeFiles/CMakeTmp'