charliecloud: Add version 0.31 with squashfuse support

'charliecloud' is a tool to handle docker and other containers
in user space. Update is justified, insofar as mariux now
allows users to handle squashfs images w/o hassle (squashfuse).

More: https://hpc.github.io/charliecloud/index.html

charliecloud-0.31-0.build.sh

@@ -0,0 +1,33 @@
+#! /bin/sh
+
+set -xe
+
+PKG=charliecloud
+VERSION=0.31
+# origin: https://github.com/hpc/charliecloud/releases/download/v0.31/charliecloud-0.31.tar.gz
+SRC=https://beehive.molgen.mpg.de/6ab9366080696a5d3eb837eb8aa3cd42/charliecloud-0.31.tar.gz
+BUILD=0
+
+PATH=/bin:/usr/bin:/usr/sbin:/usr/local/bin
+PREFIX=/pkg/$PKG-$VERSION-$BUILD
+if [ -n "$TESTING" ]; then PREFIX=/dev/shm/$PKG-$VERSION-$BUILD ; fi
+
+mkdir -p $PREFIX
+cat >$PREFIX/profile <<-EOF
+	PATH=$PREFIX/bin:\$PATH
+	if [ -d $PREFIX/.compatlibs ]; then export LD_LIBRARY_PATH=$PREFIX/.compatlibs\${LD_LIBRARY_PATH:+:\$LD_LIBRARY_PATH} ; fi
+EOF
+
+source $PREFIX/profile
+
+mkdir -p $PREFIX/build
+cd $PREFIX/build
+test -e charliecloud-$VERSION.tar.gz || wget --no-verbose $SRC
+test -d charliecloud-$VERSION || tar -xf charliecloud-$VERSION.tar.gz
+
+cd charliecloud-$VERSION
+./configure --prefix=$PREFIX
+nice -12 make -j $(( $(nproc) * 4 / 5 + 1 ))
+make install
+
+exit