diff --git a/autogen.sh b/autogen.sh
index f67ded0..cb6d26c 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -14,7 +14,7 @@ check_autotools_version()
     tool=$1
     req_ver=$2
     curr_ver=$($tool --version | head -1 | cut -f4 -d' ' | xargs echo -n)
-    if [ "$curr_ver" != "$req_ver" ]; then
+    if [ "$curr_ver" -ge "$req_ver" ]; then
         echo ""
         echo "$tool version mismatch ($req_ver) required"
         exit
diff --git a/travis/build-run.sh b/travis/build-run.sh
index 2d747e5..6df0c99 100755
--- a/travis/build-run.sh
+++ b/travis/build-run.sh
@@ -29,12 +29,14 @@ case "$MPI_IMPL" in
         mpicc --showme:command
         # see https://github.com/open-mpi/ompi/issues/2956
         export TMPDIR=/tmp
+        # suppress excessive output
+        OMPI_NO_WARN="-Wno-unknown-attributes"
         ;;
 esac
 
 # Configure and build
 ./autogen.sh
-./configure CC=mpicc CFLAGS="-std=c99" --disable-static --prefix=/tmp
+./configure CC=mpicc CFLAGS="-std=c99 $OMPI_NO_WARN" --disable-static --prefix=/tmp
 make V=1
 make V=1 install
 
diff --git a/travis/install-autotools.sh b/travis/install-autotools.sh
index 5bddfc0..b84ab11 100755
--- a/travis/install-autotools.sh
+++ b/travis/install-autotools.sh
@@ -3,120 +3,128 @@
 #set -e
 set -x
 
-os=`uname`
 TOP="$1"
 
-      MAKE_JNUM=2
-      M4_VERSION=1.4.17
-      LIBTOOL_VERSION=2.4.6
-      AUTOCONF_VERSION=2.69
-      AUTOMAKE_VERSION=1.15
+M4_VERSION=1.4.17
+LIBTOOL_VERSION=2.4.6
+AUTOCONF_VERSION=2.69
+AUTOMAKE_VERSION=1.15
 
-      cd ${TOP}
-      TOOL=m4
-      TDIR=${TOOL}-${M4_VERSION}
-      FILE=${TDIR}.tar.gz
-      BIN=${TOP}/bin/${TOOL}
-      if [ -f ${FILE} ] ; then
-        echo ${FILE} already exists! Using existing copy.
-      else
-        wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
-      fi
-      if [ -d ${TDIR} ] ; then
-        echo ${TDIR} already exists! Using existing copy.
-      else
-        echo Unpacking ${FILE}
-        tar -xzf ${FILE}
-      fi
-      if [ -f ${BIN} ] ; then
-        echo ${BIN} already exists! Skipping build.
-      else
-        cd ${TOP}/${TDIR}
-        ./configure --prefix=${TOP} && make -j ${MAKE_JNUM} && make install
-        if [ "x$?" != "x0" ] ; then
-          echo FAILURE 1
-          exit
-        fi
-      fi
+if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
 
-      cd ${TOP}
-      TOOL=libtool
-      TDIR=${TOOL}-${LIBTOOL_VERSION}
-      FILE=${TDIR}.tar.gz
-      BIN=${TOP}/bin/${TOOL}
-      if [ ! -f ${FILE} ] ; then
-        wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
-      else
-        echo ${FILE} already exists! Using existing copy.
-      fi
-      if [ ! -d ${TDIR} ] ; then
-        echo Unpacking ${FILE}
-        tar -xzf ${FILE}
-      else
-        echo ${TDIR} already exists! Using existing copy.
-      fi
-      if [ -f ${BIN} ] ; then
-        echo ${BIN} already exists! Skipping build.
-      else
-        cd ${TOP}/${TDIR}
-        ./configure --prefix=${TOP} M4=${TOP}/bin/m4 && make -j ${MAKE_JNUM} && make install
-        if [ "x$?" != "x0" ] ; then
-          echo FAILURE 2
-          exit
-        fi
-      fi
+  brew install m4       || brew upgrade m4
+  brew install libtool  || brew upgrade libtool
+  brew install autoconf || brew upgrade autoconf
+  brew install automake || brew upgrade automake
 
-      cd ${TOP}
-      TOOL=autoconf
-      TDIR=${TOOL}-${AUTOCONF_VERSION}
-      FILE=${TDIR}.tar.gz
-      BIN=${TOP}/bin/${TOOL}
-      if [ ! -f ${FILE} ] ; then
-        wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
-      else
-        echo ${FILE} already exists! Using existing copy.
-      fi
-      if [ ! -d ${TDIR} ] ; then
-        echo Unpacking ${FILE}
-        tar -xzf ${FILE}
-      else
-        echo ${TDIR} already exists! Using existing copy.
-      fi
-      if [ -f ${BIN} ] ; then
-        echo ${BIN} already exists! Skipping build.
-      else
-        cd ${TOP}/${TDIR}
-        ./configure --prefix=${TOP} M4=${TOP}/bin/m4 && make -j ${MAKE_JNUM} && make install
-        if [ "x$?" != "x0" ] ; then
-          echo FAILURE 3
-          exit
-        fi
-      fi
+else
+  MAKE_JNUM=2
 
-      cd ${TOP}
-      TOOL=automake
-      TDIR=${TOOL}-${AUTOMAKE_VERSION}
-      FILE=${TDIR}.tar.gz
-      BIN=${TOP}/bin/${TOOL}
-      if [ ! -f ${FILE} ] ; then
-        wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
-      else
-        echo ${FILE} already exists! Using existing copy.
-      fi
-      if [ ! -d ${TDIR} ] ; then
-        echo Unpacking ${FILE}
-        tar -xzf ${FILE}
-        else
-          echo ${TDIR} already exists! Using existing copy.
-        fi
-        if [ -f ${BIN} ] ; then
-          echo ${BIN} already exists! Skipping build.
-        else
-          cd ${TOP}/${TDIR}
-          ./configure --prefix=${TOP} M4=${TOP}/bin/m4 && make -j ${MAKE_JNUM} && make install
-          if [ "x$?" != "x0" ] ; then
-            echo FAILURE 4
-            exit
-          fi
-        fi
+  cd ${TOP}
+  TOOL=m4
+  TDIR=${TOOL}-${M4_VERSION}
+  FILE=${TDIR}.tar.gz
+  BIN=${TOP}/bin/${TOOL}
+  if [ -f ${FILE} ] ; then
+    echo ${FILE} already exists! Using existing copy.
+  else
+    wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
+  fi
+  if [ -d ${TDIR} ] ; then
+    echo ${TDIR} already exists! Using existing copy.
+  else
+    echo Unpacking ${FILE}
+    tar -xzf ${FILE}
+  fi
+  if [ -f ${BIN} ] ; then
+    echo ${BIN} already exists! Skipping build.
+  else
+    cd ${TOP}/${TDIR}
+    ./configure --prefix=${TOP} && make -j ${MAKE_JNUM} && make install
+    if [ "x$?" != "x0" ] ; then
+      echo FAILURE 1
+      exit
+    fi
+  fi
 
+  cd ${TOP}
+  TOOL=libtool
+  TDIR=${TOOL}-${LIBTOOL_VERSION}
+  FILE=${TDIR}.tar.gz
+  BIN=${TOP}/bin/${TOOL}
+  if [ ! -f ${FILE} ] ; then
+    wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
+  else
+    echo ${FILE} already exists! Using existing copy.
+  fi
+  if [ ! -d ${TDIR} ] ; then
+    echo Unpacking ${FILE}
+    tar -xzf ${FILE}
+  else
+    echo ${TDIR} already exists! Using existing copy.
+  fi
+  if [ -f ${BIN} ] ; then
+    echo ${BIN} already exists! Skipping build.
+  else
+    cd ${TOP}/${TDIR}
+    ./configure --prefix=${TOP} M4=${TOP}/bin/m4 && make -j ${MAKE_JNUM} && make install
+    if [ "x$?" != "x0" ] ; then
+      echo FAILURE 2
+      exit
+    fi
+  fi
+
+  cd ${TOP}
+  TOOL=autoconf
+  TDIR=${TOOL}-${AUTOCONF_VERSION}
+  FILE=${TDIR}.tar.gz
+  BIN=${TOP}/bin/${TOOL}
+  if [ ! -f ${FILE} ] ; then
+    wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
+  else
+    echo ${FILE} already exists! Using existing copy.
+  fi
+  if [ ! -d ${TDIR} ] ; then
+    echo Unpacking ${FILE}
+    tar -xzf ${FILE}
+  else
+    echo ${TDIR} already exists! Using existing copy.
+  fi
+  if [ -f ${BIN} ] ; then
+    echo ${BIN} already exists! Skipping build.
+  else
+    cd ${TOP}/${TDIR}
+    ./configure --prefix=${TOP} M4=${TOP}/bin/m4 && make -j ${MAKE_JNUM} && make install
+    if [ "x$?" != "x0" ] ; then
+      echo FAILURE 3
+      exit
+    fi
+  fi
+
+  cd ${TOP}
+  TOOL=automake
+  TDIR=${TOOL}-${AUTOMAKE_VERSION}
+  FILE=${TDIR}.tar.gz
+  BIN=${TOP}/bin/${TOOL}
+  if [ ! -f ${FILE} ] ; then
+    wget http://ftp.gnu.org/gnu/${TOOL}/${FILE}
+  else
+    echo ${FILE} already exists! Using existing copy.
+  fi
+  if [ ! -d ${TDIR} ] ; then
+    echo Unpacking ${FILE}
+    tar -xzf ${FILE}
+    else
+      echo ${TDIR} already exists! Using existing copy.
+    fi
+    if [ -f ${BIN} ] ; then
+      echo ${BIN} already exists! Skipping build.
+    else
+      cd ${TOP}/${TDIR}
+      ./configure --prefix=${TOP} M4=${TOP}/bin/m4 && make -j ${MAKE_JNUM} && make install
+      if [ "x$?" != "x0" ] ; then
+        echo FAILURE 4
+        exit
+      fi
+    fi
+fi
diff --git a/travis/install-mpi.sh b/travis/install-mpi.sh
index 7c39bc1..b9e75e9 100755
--- a/travis/install-mpi.sh
+++ b/travis/install-mpi.sh
@@ -37,10 +37,9 @@ case "$os" in
         case "$MPI_IMPL" in
             mpich_shm|mpich_odd)
                 if [ ! -d "$TRAVIS_ROOT/mpich" ]; then
-                    # mpich-v3.3a2 has symbol visibility issue, see https://github.com/pmodels/mpich/issues/2471.
-                    wget --no-check-certificate http://www.mpich.org/static/downloads/nightly/master/mpich/mpich-master-v3.3a2-452-ge0000be3f049.tar.gz
-                    tar -xzf mpich-master-v3.3a2-452-ge0000be3f049.tar.gz
-                    cd mpich-master-v3.3a2-452-ge0000be3f049
+                    wget --no-check-certificate http://www.mpich.org/static/downloads/3.3.2/mpich-3.3.2.tar.gz
+                    tar -xzf mpich-3.3.2.tar.gz
+                    cd mpich-3.3.2
                     mkdir build && cd build
                     ../configure CFLAGS="-w" --prefix=$TRAVIS_ROOT/mpich --disable-fortran --disable-static
                     make -j2
@@ -51,9 +50,9 @@ case "$os" in
                 ;;
             openmpi)
                 if [ ! -d "$TRAVIS_ROOT/open-mpi" ]; then
-                    wget --no-check-certificate https://www.open-mpi.org/software/ompi/v3.0/downloads/openmpi-3.0.0.tar.bz2
-                    tar -xjf openmpi-3.0.0.tar.bz2
-                    cd openmpi-3.0.0
+                    wget --no-check-certificate https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-4.0.2.tar.bz2
+                    tar -xjf openmpi-4.0.2.tar.bz2
+                    cd openmpi-4.0.2
                     mkdir build && cd build
                     ../configure CFLAGS="-w" --prefix=$TRAVIS_ROOT/open-mpi \
                                 --without-verbs --without-fca --without-mxm --without-ucx \