configure.in: LIBPATH on AIX

* configure.in (LIBPATHENV): LIBPATH is used on AIX, but not
  SHLIB_PATH which was carelessly copied from HP/UX.  suggested by
  Perry Smith at [ruby-core:46397].  [Bug #6728]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Mon Jul 23 14:43:34 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (LIBPATHENV): LIBPATH is used on AIX, but not
+	  SHLIB_PATH which was carelessly copied from HP/UX.  suggested by
+	  Perry Smith at [ruby-core:46397].  [Bug #6728]
+
 Mon Jul 23 01:55:08 2012  Kazuhiro NISHIYAMA  <zn@mbf.nifty.com>
 
 	* test/uri/test_generic.rb (URI#test_find_proxy): add tests with

configure.in

@@ -2288,7 +2288,7 @@ if test "$with_dln_a_out" != yes; then
 			: ${ARCHFILE="ruby.imp"}
                         TRY_LINK='$(CC) $(LDFLAGS) -oconftest $(INCFLAGS) -I$(hdrdir) $(CPPFLAGS)'
                         TRY_LINK="$TRY_LINK"' $(CFLAGS) $(src) $(LIBPATH) $(LOCAL_LIBS) $(LIBS)'
-			: ${LIBPATHENV=SHLIB_PATH}
+			: ${LIBPATHENV=LIBPATH}
 			RPATHFLAG=" ${linker_flag}-blibpath:%1\$-s:${prefix}/lib:${LIBPATH:-/usr/lib:/lib}"
 			rb_cv_dlopen=yes],
 	[beos*], [	AS_CASE(["$target_cpu"],