Here is a snippet from config.log :-
configure:7744: checking for talloc.h
configure:7758: gcc -c -g3 -Wall -D_GNU_SOURCE -Qunused-arguments -D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS -Wdocumentation -Wshadow -Wpointer-arith -Wcast-qual -Wcast-align -Wwrite-strings -Wstrict-prototypes -Wmissi
ng-prototypes -Wmissing-declarations -Wnested-externs -W -Wredundant-decls -Wundef -Wformat-y2k -Wno-format-extra-args -Wno-format-zero-length -Wno-cast-align -Wformat-nonliteral -Wformat-security -Wformat=2 -DWITH_
VERIFY_PTR=1š conftest.c >&5
gcc: unrecognized option '-Qunused-arguments'
cc1: error: unrecognized command line option "-Wdocumentation"