Determining if the getpassphrase exist failed with the following output:
Change Dir: /home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp

Run Build Command(s):/home/autobuild/make/make -f Makefile cmTC_b57df/fast && make[1]: Entering directory '/home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp'
/home/autobuild/make/make  -f CMakeFiles/cmTC_b57df.dir/build.make CMakeFiles/cmTC_b57df.dir/build
make[2]: Entering directory '/home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp'
Building CXX object CMakeFiles/cmTC_b57df.dir/CheckSymbolExists.cxx.o
/home/autobuild/autobuild/instance-4/output-1/per-package/znc/host/bin/i686-buildroot-linux-gnu-g++ --sysroot=/home/autobuild/autobuild/instance-4/output-1/per-package/znc/host/i686-buildroot-linux-gnu/sysroot   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Og -g0 -D_FORTIFY_SOURCE=3   -DNDEBUG -o CMakeFiles/cmTC_b57df.dir/CheckSymbolExists.cxx.o -c /home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx
/home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx: In function 'int main(int, char**)':
/home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:8:19: error: 'getpassphrase' was not declared in this scope
    8 |   return ((int*)(&getpassphrase))[argc];
      |                   ^~~~~~~~~~~~~
make[2]: *** [CMakeFiles/cmTC_b57df.dir/build.make:78: CMakeFiles/cmTC_b57df.dir/CheckSymbolExists.cxx.o] Error 1
make[2]: Leaving directory '/home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp'
make[1]: *** [Makefile:127: cmTC_b57df/fast] Error 2
make[1]: Leaving directory '/home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp'


File /home/autobuild/autobuild/instance-4/output-1/build/znc-1.8.2/CMakeFiles/CMakeTmp/CheckSymbolExists.cxx:
/* */
#include <stdlib.h>

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