fix for issue #672: Defect: caf script fails to fall back to dynamic libcaf

if the static lib is missing

This fixes the substring removal pattern, we want the sortest matching
suffix to make sure only the file suffix is replaced,
e.g. libcaf_mpi.a by libcaf_mpi.so. This failed in paths containing
more than one '.'

Author: LaHaine

src/extensions/caf.in

@@ -180,8 +180,8 @@ substitute_lib () {
       case "${1##*.}" in
           a|lib)
               for suff in so dylib dll ; do
-                  if [[ -f "${1%%.*}.${suff}" ]] ; then
-                      echo "${1%%.*}.${suff}"
+                  if [[ -f "${1%.*}.${suff}" ]] ; then
+                      echo "${1%.*}.${suff}"
                       return
                   fi
               done
@@ -191,8 +191,8 @@ substitute_lib () {
           ;;
           so|dylib|dll)
               for suff in a lib ; do
-                  if [[ -f "${1%%.*}.${suff}" ]] ; then
-                      echo "${1%%.*}.${suff}"
+                  if [[ -f "${1%.*}.${suff}" ]] ; then
+                      echo "${1%.*}.${suff}"
                       return
                   fi
               done