-BINM_APROPOS=mapropos # default is "apropos"
-BINM_WHATIS=mwhatis # default is "whatis"
-BINM_MAKEWHATIS=mandocdb # default is "makewhatis"
+LD_NANOSLEEP="-lrt"
+
+# Some platforms may need an additional linker flag for recvmsg(2).
+# If none is needed or it is -lsocket, it is autodetected.
+# Otherwise, set the following variable.
+
+LD_RECVMSG="-lsocket"
+
+# Some platforms might need additional linker flags to link against
+# libmandoc that are not autodetected, though no such cases are
+# currently known.
+
+LDADD="-lm"
+
+# Some systems may want to set additional linker flags for all the
+# binaries, not only for those using libmandoc, for example for
+# hardening options.
+
+LDFLAGS="-Wl,-z,relro"
+
+# It is possible to change the utility program used for installation
+# and the modes files are installed with. The defaults are:
+
+INSTALL="install"
+INSTALL_PROGRAM="${INSTALL} -m 0555"
+INSTALL_LIB="${INSTALL} -m 0444"
+INSTALL_MAN="${INSTALL} -m 0444"
+INSTALL_DATA="${INSTALL} -m 0444"