LIBS and LDFLAGS are usually used by autofoo, so in order not to
mess with it can we also check LD_LIBRARY_PATH paths in find_lib()?
E.g. like the following?

diff --git a/configure.ac b/configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -145,12 +145,13 @@ find_lib()
     gcc_bin_path=[`$CC -print-search-dirs 2>/dev/null | fgrep programs: | sed 's/[^=]*=\(.*\)/\1/' | sed 's/:/ /g'`]
     gcc_lib_path=[`$CC -print-search-dirs 2>/dev/null | fgrep libraries: | sed 's/[^=]*=\(.*\)/\1/' | sed 's/:/ /g'`]
     env_lib_path=[`echo $LIBS $LDFLAGS $* | sed 's/-L[ ]*//g'`]
+    env_lib_path2=[`echo $LD_LIBRARY_PATH | sed 's/:/ /g'`]
     if test "$cross_compiling" = yes; then
         host_lib_path=""
     else
         host_lib_path="/usr/$base_libdir /usr/local/$base_libdir"
     fi
-    for path in $env_lib_path $gcc_bin_path $gcc_lib_path $host_lib_path; do
+    for path in $env_lib_path2 $env_lib_path $gcc_bin_path $gcc_lib_path $host_lib_path; do
         lib=[`ls -- $path/$1 2>/dev/null | sed -e '/\.so\..*\./d' -e 's,.*/,,' | sort | tail -1`]
         if test x$lib != x; then
             echo $lib