Github action: PnetCDF requires libtool 2.5.4

Author: wkliao

.github/workflows/pnetcdf_master.yml

@@ -24,6 +24,7 @@ on:
 
 env:
    MPICH_VERSION: 4.3.0
+   LIBTOOL_VERSION: 2.5.4
    PNETCDF_VERSION: repo
 
 jobs:
@@ -36,11 +37,25 @@ jobs:
           run: |
             set -x
             sudo apt-get update
-            sudo apt-get install automake autoconf libtool libtool-bin m4
+            sudo apt-get install automake autoconf libtool=2.5.4 m4
             # mpich
             # sudo apt-get install mpich
             # zlib
             sudo apt-get install zlib1g-dev
+        - name: Build Libtool
+          run: |
+            set -x
+            cd ${GITHUB_WORKSPACE}
+            echo "Install Libtool on ${GITHUB_WORKSPACE}/AUTOTOOLS"
+            rm -rf AUTOTOOLS ; mkdir AUTOTOOLS ; cd AUTOTOOLS
+            curl -LO https://ftpmirror.gnu.org/libtool/libtool-${LIBTOOL_VERSION}.tar.gz
+            gzip -dc libtool-${LIBTOOL_VERSION}.tar.gz | tar -xf -
+            cd libtool-${LIBTOOL_VERSION}
+            ./configure --prefix=${GITHUB_WORKSPACE}/AUTOTOOLS \
+                        --silent \
+                        CC=gcc
+            make -s LIBTOOLFLAGS=--silent V=1 -j 8 install > qout 2>&1
+            make -s distclean >> qout 2>&1
         - name: Build MPICH
           run: |
             set -x
@@ -73,6 +88,7 @@ jobs:
           run: |
             set -x
             cd ${GITHUB_WORKSPACE}
+            export PATH="${GITHUB_WORKSPACE}/AUTOTOOLS/bin:${PATH}"
             echo "Install PnetCDF on ${GITHUB_WORKSPACE}/PnetCDF"
             rm -rf PnetCDF ; mkdir PnetCDF ; cd PnetCDF
             # curl -LO https://parallel-netcdf.github.io/Release/pnetcdf-${PNETCDF_VERSION}.tar.gz