create mode 100644 test/standalone/config_header/autoconf_at/autoconf_at.h
 create mode 100644 test/standalone/config_header/autoconf_at/autoconf_at.h.in
 delete mode 100644 test/standalone/config_header/autoconf_at/autoconf_at.txt
 delete mode 100644 test/standalone/config_header/autoconf_at/autoconf_at.txt.in