diff --git a/build.sh b/build.sh
index 8c00356..d07bdc6 100755
--- a/build.sh
+++ b/build.sh
@@ -75,4 +75,6 @@ fi
 
 [ "${PORTS_FS_MARK}" = "y" ] && ./phoenix-rtos-ports/fs_mark/build.sh
 
+[ "${PORTS_COREMARK}" = "y" ] && ./phoenix-rtos-ports/coremark/build.sh
+
 exit 0
diff --git a/coremark/01-core_portme.patch b/coremark/01-core_portme.patch
new file mode 100644
index 0000000..b9e03c9
--- /dev/null
+++ b/coremark/01-core_portme.patch
@@ -0,0 +1,28 @@
+diff --git a/posix/core_portme.mak b/posix/core_portme.mak
+index 2852069..3eaaabe 100755
+--- a/posix/core_portme.mak
++++ b/posix/core_portme.mak
+@@ -24,8 +24,12 @@ OUTFLAG= -o
+ CC?= cc
+ # Flag: CFLAGS
+ #	Use this flag to define compiler options. Note, you can add compiler options from the command line using XCFLAGS="other flags"
+-PORT_CFLAGS = -O2
+-FLAGS_STR = "$(PORT_CFLAGS) $(XCFLAGS) $(XLFLAGS) $(LFLAGS_END)"
++PORT_CFLAGS =
++FLAGS_STR := $(filter-out -I%,$(PORT_CFLAGS) $(XCFLAGS) $(XLFLAGS) $(LFLAGS_END))
++FLAGS_STR := $(filter-out --sysroot=%,$(FLAGS_STR))
++FLAGS_STR := $(filter-out -B%,$(FLAGS_STR))
++FLAGS_STR := $(filter-out -L%,$(FLAGS_STR))
++FLAGS_STR := "$(filter-out -fmacro-prefix-map=%,$(FLAGS_STR))"
+ CFLAGS = $(PORT_CFLAGS) -I$(PORT_DIR) -Iposix -I. -DFLAGS_STR=\"$(FLAGS_STR)\"
+ # Flag: NO_LIBRT
+ #	Define if the platform does not provide a librt
+@@ -65,7 +69,7 @@ LOAD = echo Loading done
+ RUN = 
+ 
+ OEXT = .o
+-EXE = .exe
++EXE =
+ 
+ # Flag: SEPARATE_COMPILE
+ # Define if you need to separate compilation from link stage. 
diff --git a/coremark/build.sh b/coremark/build.sh
new file mode 100755
index 0000000..bb5d388
--- /dev/null
+++ b/coremark/build.sh
@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+set -e
+
+COREMARK_VER="1.0"
+COREMARK=coremark-${COREMARK_VER}
+COREMARK_COMMIT="d5fad6bd094899101a4e5fd53af7298160ced6ab"
+PKG_URL="https://github.com/eembc/coremark/archive/${COREMARK_COMMIT}.tar.gz"
+PKG_MIRROR_URL="https://files.phoesys.com/ports/${COREMARK}.tar.gz"
+
+b_log "Building coremark"
+PREFIX_COREMARK="${PREFIX_PROJECT}/phoenix-rtos-ports/coremark"
+PREFIX_COREMARK_BUILD="${PREFIX_BUILD}/coremark"
+PREFIX_COREMARK_SRC="${PREFIX_COREMARK_BUILD}/${COREMARK}"
+PREFIX_COREMARK_MARKERS="${PREFIX_COREMARK_BUILD}/markers"
+
+#
+# Download and unpack
+#
+mkdir -p "$PREFIX_COREMARK_BUILD"
+if ! [ -f "${PREFIX_COREMARK}/${COREMARK}.tar.gz" ]; then
+	if ! wget "$PKG_URL" -O "${PREFIX_COREMARK}/${COREMARK}.tar.gz" --no-check-certificate; then
+		wget "$PKG_MIRROR_URL" -P "${PREFIX_COREMARK}" --no-check-certificate
+	fi
+fi
+
+if ! [ -d "${PREFIX_COREMARK_SRC}" ]; then
+	tar xzf "${PREFIX_COREMARK}/${COREMARK}.tar.gz" -C "${PREFIX_COREMARK_BUILD}" && mv "${PREFIX_COREMARK_BUILD}"/coremark-"${COREMARK_COMMIT}" "${PREFIX_COREMARK_BUILD}"/${COREMARK}
+fi
+
+#
+# Apply patches
+#
+mkdir -p "$PREFIX_COREMARK_MARKERS"
+
+for patchfile in "$PREFIX_COREMARK"/*.patch; do
+	if [ ! -f "$PREFIX_COREMARK_BUILD/markers/$(basename "$patchfile").applied" ]; then
+		echo "applying patch: $patchfile"
+		patch -d "$PREFIX_COREMARK_SRC" -p1 < "$patchfile"
+		touch "$PREFIX_COREMARK_MARKERS/$(basename "$patchfile").applied"
+	fi
+done
+
+#
+# Configure
+#
+mkdir -p "${PREFIX_COREMARK_BUILD}/${COREMARK}/phoenix"
+cp -a "$PREFIX_COREMARK/core-portme.mak" "$PREFIX_COREMARK_BUILD/${COREMARK}/phoenix/core_portme.mak"
+
+cd "${PREFIX_COREMARK_BUILD}/${COREMARK}"
+
+if [ -z ${PORTS_COREMARK_THREADS+x} ]; then
+	PORTS_COREMARK_THREADS="1"
+fi
+
+export XCFLAGS="${CFLAGS} -DUSE_PTHREAD -DMULTITHREAD=${PORTS_COREMARK_THREADS}"
+export XLFLAGS="${LDFLAGS}"
+
+# Build coremark
+PORT_DIR=phoenix make compile
+
+cp -a "$PREFIX_COREMARK_BUILD/${COREMARK}/coremark" "$PREFIX_PROG/coremark"
+"${CROSS}strip" -s "${PREFIX_PROG}/coremark" -o "${PREFIX_PROG_STRIPPED}/coremark"
+b_install "$PREFIX_PORTS_INSTALL/coremark" /bin
diff --git a/coremark/core-portme.mak b/coremark/core-portme.mak
new file mode 100644
index 0000000..91a94f9
--- /dev/null
+++ b/coremark/core-portme.mak
@@ -0,0 +1,3 @@
+NO_LIBRT = 1
+
+include posix/core_portme.mak