Determining if the function dwfl_module_build_id exists in the elf failed with the following output:
Change Dir: /home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_f3f51/fast && make[1]: Entering directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'
/usr/bin/make  -f CMakeFiles/cmTC_f3f51.dir/build.make CMakeFiles/cmTC_f3f51.dir/build
make[2]: Entering directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_f3f51.dir/CheckFunctionExists.c.o
/usr/bin/gcc   -O2 -I/home/buildroot/autobuild/run/instance-2/output-1/host/include -pthread -DCHECK_FUNCTION_EXISTS=dwfl_module_build_id -o CMakeFiles/cmTC_f3f51.dir/CheckFunctionExists.c.o -c /home/buildroot/autobuild/run/instance-2/output-1/host/share/cmake-3.18/Modules/CheckFunctionExists.c
Linking C executable cmTC_f3f51
/home/buildroot/autobuild/run/instance-2/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_f3f51.dir/link.txt --verbose=1
/usr/bin/gcc -O2 -I/home/buildroot/autobuild/run/instance-2/output-1/host/include -pthread -DCHECK_FUNCTION_EXISTS=dwfl_module_build_id -rdynamic CMakeFiles/cmTC_f3f51.dir/CheckFunctionExists.c.o -o cmTC_f3f51  -Wl,-rpath,/home/buildroot/autobuild/run/instance-2/output-1/host/usr/lib -lelf /home/buildroot/autobuild/run/instance-2/output-1/host/usr/lib/libdw.so /home/buildroot/autobuild/run/instance-2/output-1/host/usr/lib/libelf.so 
/usr/bin/ld: cannot find -lelf
collect2: error: ld returned 1 exit status
make[2]: *** [cmTC_f3f51] Error 1
make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_f3f51/fast] Error 2
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'



Performing C SOURCE FILE Test HAVE_REALLOCARRAY_SUPPORT failed with the following output:
Change Dir: /home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make cmTC_070e3/fast && make[1]: Entering directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'
/usr/bin/make  -f CMakeFiles/cmTC_070e3.dir/build.make CMakeFiles/cmTC_070e3.dir/build
make[2]: Entering directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'
Building C object CMakeFiles/cmTC_070e3.dir/src.c.o
/usr/bin/gcc   -O2 -I/home/buildroot/autobuild/run/instance-2/output-1/host/include -pthread -DHAVE_REALLOCARRAY_SUPPORT -o CMakeFiles/cmTC_070e3.dir/src.c.o -c /home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp/src.c
Linking C executable cmTC_070e3
/home/buildroot/autobuild/run/instance-2/output-1/host/bin/cmake -E cmake_link_script CMakeFiles/cmTC_070e3.dir/link.txt --verbose=1
/usr/bin/gcc -O2 -I/home/buildroot/autobuild/run/instance-2/output-1/host/include -pthread -DHAVE_REALLOCARRAY_SUPPORT -rdynamic CMakeFiles/cmTC_070e3.dir/src.c.o -o cmTC_070e3  -Wl,-rpath,/home/buildroot/autobuild/run/instance-2/output-1/host/usr/lib /home/buildroot/autobuild/run/instance-2/output-1/host/usr/lib/libdw.so /home/buildroot/autobuild/run/instance-2/output-1/host/usr/lib/libelf.so 
CMakeFiles/cmTC_070e3.dir/src.c.o: In function `main':
src.c:(.text.startup+0x13): undefined reference to `reallocarray'
collect2: error: ld returned 1 exit status
make[2]: *** [cmTC_070e3] Error 1
make[2]: Leaving directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'
make[1]: *** [cmTC_070e3/fast] Error 2
make[1]: Leaving directory `/home/buildroot/autobuild/run/instance-2/output-1/build/host-pahole-v1.23/CMakeFiles/CMakeTmp'


Source file was:

#define _GNU_SOURCE
#include <stdlib.h>
int main(void)
{
        return !!reallocarray(NULL, 1, 1);
}