Changed openjpeg archive prefix for versions newer than 2.1.0

library_builders.sh

@@ -143,7 +143,11 @@ function build_openjpeg {
     build_tiff
     build_lcms2
     local cmake=$(get_cmake)
-    fetch_unpack https://github.com/uclouvain/openjpeg/archive/version.${OPENJPEG_VERSION}.tar.gz
+    local archive_prefix="v"
+    if [ $(lex_ver $OPENJPEG_VERSION) -lt $(lex_ver 2.1.1) ]; then
+        archive_prefix="version."
+    fi
+    fetch_unpack https://github.com/uclouvain/openjpeg/archive/${archive_prefix}${OPENJPEG_VERSION}.tar.gz
     (cd openjpeg-version.${OPENJPEG_VERSION} \
         && $cmake -DCMAKE_INSTALL_PREFIX=$BUILD_PREFIX . \
         && make install)