bug#16268: LT__UNUSED in libltdl/ltdl.c and compiler warning

[Dilyan Palauzov]

Hello,

my GCC 4.8.3 20131226 (prerelease) produces the warning in  
libltdl/ltdl.c, when compiled with -Wall -Wextra:

  CC       libltdl/libltdl_libltdlc_la-ltdl.lo
libltdl/ltdl.c: In function ‘load_deplibs’:
libltdl/ltdl.c:818:53: warning: unused parameter ‘deplibs’  
[-Wunused-parameter]
 load_deplibs (lt_dlhandle handle, char * LT__UNUSED deplibs)
                                                     ^
which warning is fixed with the patch below.

By the way the warning disappears, in all these cases:
load_deplibs (lt_dlhandle handle, LT__UNUSED char * deplibs)
load_deplibs (lt_dlhandle handle, char LT__UNUSED * deplibs)
load_deplibs (lt_dlhandle handle, char * deplibs LT__UNUSED)

Reading  
http://gcc.gnu.org/onlinedocs/gcc/Attribute-Syntax.html#Attribute-Syntax I do  
not see how LT__UNUSED between * and deplibs shall be wrong, but the  
compiler emits the warnings.

libtool master# git describe
v2.4.2.418-11-g4494446

Kind regards
  Dilyan Palauzov

diff --git a/libltdl/ltdl.c b/libltdl/ltdl.c
index 43c4e62..f8649a4 100644
--- a/libltdl/ltdl.c
+++ b/libltdl/ltdl.c
@@ -815,7 +815,7 @@ find_handle (const char *search_path, const char  
*base_name,

 #if !defined LTDL_DLOPEN_DEPLIBS
 static int
-load_deplibs (lt_dlhandle handle, char * LT__UNUSED deplibs)
+load_deplibs (lt_dlhandle handle, LT__UNUSED char * deplibs)
 {
   handle->depcount = 0;
   return 0;