Enable shared build & fix build script (#157)

* add build_shared as per different suggestions

* deploy liboqs if not installed

* create install dir if not present

oqs-scripts/build_liboqs.sh

@@ -14,6 +14,6 @@ PREFIX=${PREFIX:-"`pwd`/oqs"}
 cd oqs-scripts/tmp/liboqs
 rm -rf build
 mkdir build && cd build
-cmake .. -GNinja -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_INSTALL_PREFIX=${PREFIX}
+cmake .. -GNinja -DBUILD_SHARED_LIBS=ON -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_INSTALL_PREFIX=${PREFIX}
 ninja
 ninja install

oqs-scripts/build_openssh.sh

@@ -33,4 +33,9 @@ if [ "x${CIRCLECI}" == "xtrue" ] || [ "x${TRAVIS}" == "xtrue" ]; then
 else
     make -j
 fi
+# check whether INSTALL_PREFIX/lib exists to support shared OQS builds
+if [ ! -d $INSTALL_PREFIX/lib ]; then
+   mkdir -p $INSTALL_PREFIX
+   cp -R oqs/lib $INSTALL_PREFIX
+fi
 make install