diff --git a/lib/Makefile b/lib/Makefile
index bdb367875d5a..35328f5881f6 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -27,7 +27,7 @@
 SUBDIR=	${_csu} libbsm libcom_err libcrypt libkvm msun libmd libncurses \
 	libnetgraph libradius librpcsvc libsbuf libtacplus libutil \
 	${_libypclnt} libalias libarchive ${_libatm} \
-	libbegemot ${_libbluetooth} libbsnmp libbz2 libc ${_libc_r} \
+	libbegemot ${_libbluetooth} libbsnmp libbz2 libc \
 	libcalendar libcam libcompat libdevinfo libdevstat libdisk \
 	libedit libexpat libfetch libform libftpio libgeom ${_libgpib} \
 	libgssapi libipsec \
@@ -76,11 +76,6 @@ _libvgl=	libvgl
 _libsmb=	libsmb
 .endif
 
-.if ${MACHINE_ARCH} != "arm" && ${MACHINE_ARCH} != "ia64" && \
-    ${MACHINE_ARCH} != "powerpc" && ${MK_LIBC_R} != "no"
-_libc_r=
-.endif
-
 .if ${MK_SENDMAIL} != "no"
 _libmilter=	libmilter
 _libsm=		libsm
diff --git a/share/man/man3/Makefile b/share/man/man3/Makefile
index 700647158427..fcc94ef3dfbc 100644
--- a/share/man/man3/Makefile
+++ b/share/man/man3/Makefile
@@ -146,7 +146,7 @@ MLINKS+=	tree.3 RB_EMPTY.3 \
 		tree.3 SPLAY_RIGHT.3 \
 		tree.3 SPLAY_ROOT.3
 
-.if ${MK_LIBC_R} != "no" || ${MK_LIBPTHREAD} != "no" || ${MK_LIBTHR} != "no"
+.if ${MK_LIBPTHREAD} != "no" || ${MK_LIBTHR} != "no"
 PTHREAD_MAN=	pthread.3 \
 		pthread_atfork.3 \
 		pthread_attr.3 \
diff --git a/share/mk/bsd.compat.mk b/share/mk/bsd.compat.mk
index d7eada6743cb..dfa5dfc53e2d 100644
--- a/share/mk/bsd.compat.mk
+++ b/share/mk/bsd.compat.mk
@@ -15,7 +15,6 @@
 	NOINFO:NO_INFO \
 	NOINFOCOMPRESS:NO_INFOCOMPRESS \
 	NOINSTALLLIB:NO_INSTALLLIB \
-	NOLIBC_R:NO_LIBC_R \
 	NOLIBPTHREAD:NO_LIBPTHREAD \
 	NOLIBTHR:NO_LIBTHR \
 	NOLINT:NO_LINT \
diff --git a/share/mk/bsd.libnames.mk b/share/mk/bsd.libnames.mk
index 55fb952b8377..deda217be0bf 100644
--- a/share/mk/bsd.libnames.mk
+++ b/share/mk/bsd.libnames.mk
@@ -26,7 +26,6 @@ LIBBSNMP?=	${DESTDIR}${LIBDIR}/libbsnmp.a
 LIBBZ2?=	${DESTDIR}${LIBDIR}/libbz2.a
 LIBC?=		${DESTDIR}${LIBDIR}/libc.a
 LIBC_PIC?=	${DESTDIR}${LIBDIR}/libc_pic.a
-LIBC_R?=	${DESTDIR}${LIBDIR}/libc_r.a
 LIBCALENDAR?=	${DESTDIR}${LIBDIR}/libcalendar.a
 LIBCAM?=	${DESTDIR}${LIBDIR}/libcam.a
 LIBCOM_ERR?=	${DESTDIR}${LIBDIR}/libcom_err.a
diff --git a/share/mk/bsd.own.mk b/share/mk/bsd.own.mk
index febb85b26f6c..ea660dde07b9 100644
--- a/share/mk/bsd.own.mk
+++ b/share/mk/bsd.own.mk
@@ -233,7 +233,6 @@ WITHOUT_${var}=
     IPX \
     KERBEROS \
     LIB32 \
-    LIBC_R \
     LIBPTHREAD \
     LIBTHR \
     LOCALES \
@@ -320,7 +319,6 @@ WITH_IDEA=
     IPX \
     KERBEROS \
     LIB32 \
-    LIBC_R \
     LIBPTHREAD \
     LIBTHR \
     LOCALES \
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index caab63531592..4eab690416ab 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -872,10 +872,6 @@ OLD_FILES+=usr/share/man/man8/ktutil.8.gz
 # to be filled in
 #.endif
 
-#.if ${MK_LIBC_R} == no
-# to be filled in
-#.endif
-
 #.if ${MK_LIBPTHREAD} == no
 # to be filled in
 #.endif
diff --git a/tools/build/options/WITHOUT_LIBC_R b/tools/build/options/WITHOUT_LIBC_R
deleted file mode 100644
index 7b88541891f7..000000000000
--- a/tools/build/options/WITHOUT_LIBC_R
+++ /dev/null
@@ -1,5 +0,0 @@
-.\" $FreeBSD$
-Set to not build
-.Nm libc_r
-(reentrant version of
-.Nm libc ) .