Build required version of libpng for CentOS7

Author: pruthvistony

.ci/docker/common/install_base.sh

@@ -92,6 +92,30 @@ install_ubuntu() {
   rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 }
 
+build_libpng() {
+  # install few packages
+  yum install -y zlib zlib-devel
+
+  LIBPNG_VERSION=1.6.37
+
+  mkdir -p libpng
+  pushd libpng
+
+  wget http://download.sourceforge.net/libpng/libpng-$LIBPNG_VERSION.tar.gz
+  tar -xvzf libpng-$LIBPNG_VERSION.tar.gz
+
+  pushd libpng-$LIBPNG_VERSION
+
+  ./configure
+  make
+  make install
+
+  popd
+
+  popd
+  rm -rf libpng
+}
+
 install_centos() {
   # Need EPEL for many packages we depend on.
   # See http://fedoraproject.org/wiki/EPEL
@@ -129,6 +153,11 @@ install_centos() {
     unzip \
     gdb
 
+  # CentOS7 doesnt have support for higher version of libpng,
+  # so it is built from source.
+  # Libpng is required for torchvision build.
+  build_libpng
+
   # Cleanup
   yum clean all
   rm -rf /var/cache/yum