"Configure failed" build failure(s) — clang 6.0

PackageVersionSupposed error messageFull log Bug report
cloop 3.14.1.2checking for C compiler default output file name... configure: error: C compiler cannot create executables Log
db5.3 5.3.28-13.1conftest.cpp:11:10: fatal error: 'ac_nonexistent.h' file not found Log
xdiskusage 1.48-10.1configure: error: installation or configuration problem: C++ compiler cannot create executables. Log

3 errors