build GSL in CI flow

ci-scripts/install-deps.sh

@@ -8,7 +8,7 @@ PREFIX=$1
 
 set -ex
 mkdir -p local/build
-for d in nlopt minuit hdf5; do
+for d in gsl nlopt minuit hdf5; do
   if [ ! -e local/.built.${d} ]; then
     ./install-${d}.sh ${PREFIX}
   fi

ci-scripts/install-gsl.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+
+NAME='gsl-2.5'
+
+if (( $# != 1 )); then
+  echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
+  exit 1
+fi
+PREFIX=$1
+
+set -ex
+INITDIR=`pwd`
+cd local/build
+wget http://ftpmirror.gnu.org/gsl/${NAME}.tar.gz
+tar -xzvf ${NAME}.tar.gz
+mkdir -p ${NAME}/build
+cd ${NAME}/build
+../configure --prefix=${PREFIX}
+make -j4 
+make install
+cd ${INITDIR}/local
+touch .built.gsl
+cd ${INITDIR}