diff --git a/repos/libports/lib/mk/libm.inc b/repos/libports/lib/mk/libm.inc
index ed6fa92f55..b4e3dbc271 100644
--- a/repos/libports/lib/mk/libm.inc
+++ b/repos/libports/lib/mk/libm.inc
@@ -1,55 +1,65 @@
-PORT_DIR := $(call select_from_ports,libc)
-
-# Depot hack
-ifneq ($(PORT_DIR),)
-LIBM_PORT_DIR = $(PORT_DIR)/
-endif
-
-LIBM_SRC_DIR := $(LIBM_PORT_DIR)src/lib/openlibm
+LIBC_PORT_DIR := $(call select_from_ports,libc)
+LIBC_DIR      := $(LIBC_PORT_DIR)/src/lib/libc
+LIBM_DIR      := $(LIBC_DIR)/lib/msun
 
 SHARED_LIB = yes
-LIBS += libc
 
-CC_C_OPT += -fno-gnu89-inline
-CC_C_OPT += -std=c99 -DASSEMBLER -D__BSD_VISIBLE -Wno-implicit-function-declaration
+LIBS = libc
 
-CC_OPT += -include sys/cdefs.h
+#
+# finding 'math_private.h'
+#
+INC_DIR += $(LIBM_DIR)/src
 
-INC_DIR += $(REP_DIR)/include/openlibm
-INC_DIR += $(LIBM_SRC_DIR)
-INC_DIR += $(LIBM_SRC_DIR)/src
-INC_DIR += $(LIBM_PORT_DIR)include/openlibm
-INC_DIR += $(LIBM_SRC_DIR)/include
+#
+# finding 'fpmath.h', included by 'invtrig.h'
+#
+INC_DIR += $(LIBC_DIR)/lib/libc/include
 
-SUBDIRS = src $(ARCH) bsdsrc
-# Add ld80 directory on x86 and x64
-ifneq ($(filter $(ARCH),i387 amd64),)
-SUBDIRS += ld80
-else
-ifneq ($(filter $(ARCH),aarch64),)
-SUBDIRS += ld128
-else
-endif
+FILTER_OUT += s_exp2l.c
+
+#
+# Files that are included by other sources (e.g., 's_sin.c'). Hence, we need
+# to remove them from the build. Otherwise, we would end up with doubly
+# defined symbols (and compiler warnings since those files are apparently
+# not meant to be compiled individually).
+#
+FILTER_OUT += e_rem_pio2.c e_rem_pio2f.c
+
+#
+# Use default warning level rather than -Wall because we do not want to touch
+# the imported source code to improve build aesthetics.
+#
+CC_WARN =
+
+SRC_C  = $(wildcard $(LIBM_DIR)/src/*.c) \
+         $(wildcard $(LIBM_DIR)/bsdsrc/*.c)
+
+#
+# 128 bit quadruple precision format
+#
+ifeq ($(LIBM_LD128),yes)
+INC_DIR += $(LIBM_DIR)/ld128
+SRC_C   += $(wildcard $(LIBM_DIR)/ld128/*.c)
+
+vpath %.c $(LIBM_DIR)/ld128
 endif
 
-define INC_template
-TEST=test
-override CUR_SRCS = $(1)_SRCS
--include $(LIBM_SRC_DIR)/$(1)/Make.files
-SRCS += $$(addprefix $(1)/,$$($(1)_SRCS))
-endef
+#
+# 80 bit extented precision format
+#
+ifeq ($(LIBM_LD80),yes)
+INC_DIR += $(LIBM_DIR)/ld80
+SRC_C   += $(wildcard $(LIBM_DIR)/ld80/*.c)
 
-$(foreach dir,$(SUBDIRS),$(eval $(call INC_template,$(dir))))
+vpath %.c $(LIBM_DIR)/ld80
+endif
 
-DUPLICATE_NAMES = $(filter $(patsubst %.S,%,$($(ARCH)_SRCS)),$(patsubst %.c,%,$(src_SRCS)))
-DUPLICATE_SRCS = $(addsuffix .c,$(DUPLICATE_NAMES))
+SRC_C := $(filter-out $(FILTER_OUT),$(notdir $(SRC_C)))
 
-CLEAN_SRCS = $(filter-out $(DUPLICATE_SRCS),$(notdir $(SRCS)))
+vpath %.c $(LIBM_DIR)/src
+vpath %.c $(LIBM_DIR)/bsdsrc
 
-SRC_C += $(filter %.c,$(CLEAN_SRCS))
-SRC_S += $(filter %.S,$(CLEAN_SRCS))
+CC_CXX_WARN_STRICT =
 
-$(foreach dir,$(SUBDIRS),$(eval vpath %.c $(LIBM_SRC_DIR)/$(dir)))
-$(foreach dir,$(SUBDIRS),$(eval vpath %.S $(LIBM_SRC_DIR)/$(dir)))
-
-$(foreach dir,$(SUBDIRS),$(eval INC_DIR += $(LIBM_SRC_DIR)/$(dir)))
+# vi: set ft=make :
diff --git a/repos/libports/lib/mk/spec/arm/libm.mk b/repos/libports/lib/mk/spec/arm/libm.mk
index 3fcfdda847..a056032062 100644
--- a/repos/libports/lib/mk/spec/arm/libm.mk
+++ b/repos/libports/lib/mk/spec/arm/libm.mk
@@ -1,2 +1,25 @@
-ARCH = arm
+#
+# Requires ld80/ld128 not supported on arm
+#
+FILTER_OUT = catrigl.c e_atan2l.c e_coshl.c e_sinhl.c \
+             s_atanl.c s_fmal.c s_tanhl.c
+
+#
+# Unsupported long double format
+#
+FILTER_OUT += e_acosl.c e_asinl.c e_acoshl.c e_atanhl.c \
+              s_asinhl.c s_clogl.c s_cosl.c s_csqrtl.c \
+              s_frexpl.c s_nextafterl.c s_nexttoward.c \
+              s_rintl.c s_scalbnl.c s_sincosl.c s_sinl.c \
+              s_tanl.c
+
+#
+# Unsupported 'xbits' in 'IEEEl2bits'
+#
+FILTER_OUT += e_hypotl.c s_cbrtl.c s_roundl.c
+
 include $(REP_DIR)/lib/mk/libm.inc
+
+SRC_C += msun/arm/fenv.c
+
+vpath msun/arm/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/lib/mk/spec/arm_64/libm.mk b/repos/libports/lib/mk/spec/arm_64/libm.mk
index 7e71e1835d..7fb77217db 100644
--- a/repos/libports/lib/mk/spec/arm_64/libm.mk
+++ b/repos/libports/lib/mk/spec/arm_64/libm.mk
@@ -1,2 +1,7 @@
-ARCH = aarch64
+LIBM_LD128 = yes
+
 include $(REP_DIR)/lib/mk/libm.inc
+
+SRC_C += msun/aarch64/fenv.c
+
+vpath msun/aarch64/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/lib/mk/spec/x86_32/libc.mk b/repos/libports/lib/mk/spec/x86_32/libc.mk
index 3a4083e654..d6c14c3f75 100644
--- a/repos/libports/lib/mk/spec/x86_32/libc.mk
+++ b/repos/libports/lib/mk/spec/x86_32/libc.mk
@@ -3,7 +3,4 @@ include $(REP_DIR)/lib/mk/libc.mk
 INC_DIR += $(REP_DIR)/src/lib/libc/spec/x86_32
 INC_DIR += $(LIBC_DIR)/include/spec/x86_32
 
-SRC_C += msun/i387/fenv.c
-vpath msun/i387/fenv.c $(LIBC_DIR)/lib
-
 CC_CXX_WARN_STRICT =
diff --git a/repos/libports/lib/mk/spec/x86_32/libm.mk b/repos/libports/lib/mk/spec/x86_32/libm.mk
index 616ebe620f..a338ef3b6e 100644
--- a/repos/libports/lib/mk/spec/x86_32/libm.mk
+++ b/repos/libports/lib/mk/spec/x86_32/libm.mk
@@ -1,2 +1,7 @@
-ARCH = i387
+LIBM_LD80 = yes
+
 include $(REP_DIR)/lib/mk/libm.inc
+
+SRC_C += msun/i387/fenv.c
+
+vpath msun/i387/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/lib/mk/spec/x86_64/libm.mk b/repos/libports/lib/mk/spec/x86_64/libm.mk
index a8734f8adf..ae0c2f9ad5 100644
--- a/repos/libports/lib/mk/spec/x86_64/libm.mk
+++ b/repos/libports/lib/mk/spec/x86_64/libm.mk
@@ -1,2 +1,7 @@
-ARCH = amd64
+LIBM_LD80 = yes
+
 include $(REP_DIR)/lib/mk/libm.inc
+
+SRC_C += msun/amd64/fenv.c
+
+vpath msun/amd64/fenv.c $(LIBC_DIR)/lib
diff --git a/repos/libports/ports/libc.hash b/repos/libports/ports/libc.hash
index 558e7d5d42..9113419bec 100644
--- a/repos/libports/ports/libc.hash
+++ b/repos/libports/ports/libc.hash
@@ -1 +1 @@
-3ec28a350593879749a015a584ed24ffd7d3edce
+368270b192622fe7c23d0318e737d3370663d52c
diff --git a/repos/libports/ports/libc.port b/repos/libports/ports/libc.port
index 3e19d8fc3c..83198a86c8 100644
--- a/repos/libports/ports/libc.port
+++ b/repos/libports/ports/libc.port
@@ -1,6 +1,6 @@
 LICENSE   = BSD
 VERSION   = 12.0.0
-DOWNLOADS = libc.archive openlibm.archive
+DOWNLOADS = libc.archive
 
 D = src/lib/libc
 
@@ -8,14 +8,6 @@ URL(libc) = http://ftp.freebsd.org/pub/FreeBSD/releases/amd64/12.0-RELEASE/src.t
 SHA(libc) = 0da393ac2174168a71c1c527d1453e07372295187d05c288250800cb152a889b
 DIR(libc) = $(D)
 
-OWNER := JuliaMath
-REPO  := openlibm
-REV   := a96f0740e32c3d8aaa0a34c3988201018dfa90ce
-
-URL(openlibm) := https://github.com/$(OWNER)/$(REPO)/archive/$(REV).tar.gz
-SHA(openlibm) := a9c7d4450c3e9a8b92ec1e20c7a9fd2682e900743dff37f163c9a9ac68b4f471
-DIR(openlibm) := src/lib/openlibm
-
 TAR_OPT(libc) = --strip-components=2
 
 TAR_OPT(libc) += usr/src/contrib/gdtoa
@@ -53,10 +45,7 @@ PATCHES := $(sort $(wildcard $(REP_DIR)/$(D)/patches/*.patch))
 #
 # Generic headers
 #
-
-DIRS := include/libc include/openlibm
-
-DIR_CONTENT(include/openlibm) = src/lib/openlibm/include/*
+DIRS := include/libc
 
 DIR_CONTENT(include/libc) := \
     $(addprefix $(D)/include/,\
@@ -215,7 +204,7 @@ DIR_CONTENT(include/spec/arm/libc) := \
 DIRS += include/spec/arm/libc/machine
 DIR_CONTENT(include/spec/arm/libc/machine) := \
     $(call common_include_libc_arch_machine_content,arm) \
-    $(addprefix $(D)/sys/arm/include/, armreg.h atomic-v6.h ieee.h sysreg.h sigframe.h)
+    $(addprefix $(D)/sys/arm/include/, acle-compat.h armreg.h atomic-v6.h ieee.h sysreg.h sigframe.h)
 
 
 #
diff --git a/repos/libports/recipes/src/libc/content.mk b/repos/libports/recipes/src/libc/content.mk
index c9b3aa755b..5dca045c46 100644
--- a/repos/libports/recipes/src/libc/content.mk
+++ b/repos/libports/recipes/src/libc/content.mk
@@ -1,4 +1,4 @@
-content: include/libc-plugin src/lib/libc/target.mk lib/mk LICENSE src/lib/openlibm
+content: include/libc-plugin src/lib/libc/target.mk lib/mk LICENSE
 
 LIBC_PORT_DIR := $(call port_dir,$(REP_DIR)/ports/libc)
 LIBM_PORT_DIR := $(LIBC_PORT_DIR)
@@ -8,10 +8,6 @@ src/lib/libc:
 	cp -r $(LIBC_PORT_DIR)/src/lib/libc/* $@
 	cp -r $(REP_DIR)/src/lib/libc/* $@
 
-src/lib/openlibm:
-	mkdir -p $@
-	cp -r $(LIBM_PORT_DIR)/$@/* $@
-
 # target.mk for triggering the build of both libraries libc and libm
 src/lib/libc/target.mk: src/lib/libc
 	echo "LIBS += libc libm" > $@
diff --git a/repos/libports/run/ieee754.run b/repos/libports/run/ieee754.run
index b226fa2c46..25ea6edf84 100644
--- a/repos/libports/run/ieee754.run
+++ b/repos/libports/run/ieee754.run
@@ -1480,16 +1480,16 @@ DBL_MAX_EXP = 1024
 LDBL_MAX_EXP = 16384
 
 FLT_EPSILON = 1.19209e-07 = 0x1p-23
-DBL_EPSILON = 2.22044e-16 = 0x1p-52
-LDBL_EPSILON = 1.92592e-34 = 0x1p-112
+DBL_EPSILON = 2.22045e-16 = 0x1p-52
+LDBL_EPSILON = 1.92593e-34 = 0x1p-112
 
-FLT_MIN = 1.1755e-38 = 0x1p-126
-DBL_MIN = 2.22508e-308 = 0x1p-1022
-LDBL_MIN = 3.36211e-4932 = 0x1p-16382
+FLT_MIN = 1.17549e-38 = 0x1p-126
+DBL_MIN = 2.22507e-308 = 0x1p-1022
+LDBL_MIN = 3.3621e-4932 = 0x1p-16382
 
-FLT_MAX = 3.40283e+38 = 0x1.fffffep+127
-DBL_MAX = 1.7977e+308 = 0x1.fffffffffffffp+1023
-LDBL_MAX = 1.18974e+4932 = 0x1.ffffffffffffffffffffffffffffp+16383
+FLT_MAX = 3.40282e+38 = 0x1.fffffep+127
+DBL_MAX = 1.79769e+308 = 0x1.fffffffffffffp+1023
+LDBL_MAX = 1.18973e+4932 = 0x1.ffffffffffffffffffffffffffffp+16383
 
 sizeof(float) = 4
 sizeof(double) = 8
@@ -1498,7 +1498,7 @@ sizeof(long double) = 16
 x + y, with x = 9007199254740994.0 and y = 1.0 - 1/65536.0 (type double).
 The IEEE-754 result is 9007199254740994 with double precision.
 The IEEE-754 result is 9007199254740996 with extended precision.
-The obtained result is 9007199254740996.
+The obtained result is 9007199254740994.
 
 NAN != NAN --> 1 (should be 1)
 isnan(NAN) --> 1 (should be 1)