configure: Try readelf before ldd to determine a library soname.

aclocal.m4

@@ -22,18 +22,20 @@ dnl configuration script generated by Autoconf, you may include it
 dnl under the same distribution terms that you use for the rest of
 dnl that program.
 
-dnl **** Get the ldd program name; used by WINE_GET_SONAME ****
+dnl **** Get the programs used by WINE_GET_SONAME ****
 dnl
-dnl Usage: WINE_PATH_LDD
+dnl Usage: WINE_PATH_SONAME_TOOLS
 dnl
-AC_DEFUN([WINE_PATH_LDD],[AC_PATH_PROG(LDD,ldd,true,/sbin:/usr/sbin:$PATH)])
+AC_DEFUN([WINE_PATH_SONAME_TOOLS],
+[AC_PATH_PROG(LDD,ldd,true,/sbin:/usr/sbin:$PATH)
+AC_CHECK_TOOLS(READELF,[readelf],true)])
 
 dnl **** Extract the soname of a library ****
 dnl
 dnl Usage: WINE_CHECK_SONAME(library, function, [action-if-found, [action-if-not-found, [other_libraries, [pattern]]]])
 dnl
 AC_DEFUN([WINE_CHECK_SONAME],
-[AC_REQUIRE([WINE_PATH_LDD])dnl
+[AC_REQUIRE([WINE_PATH_SONAME_TOOLS])dnl
 AS_VAR_PUSHDEF([ac_Lib],[ac_cv_lib_soname_$1])dnl
 m4_pushdef([ac_lib_pattern],m4_default([$6],[lib$1]))dnl
 AC_MSG_CHECKING([for -l$1])
@@ -44,7 +46,9 @@ LIBS="-l$1 $5 $LIBS"
   [case "$LIBEXT" in
     dll) AS_VAR_SET(ac_Lib,[`$ac_cv_path_LDD conftest.exe | grep "$1" | sed -e "s/dll.*/dll/"';2,$d'`]) ;;
     dylib) AS_VAR_SET(ac_Lib,[`otool -L conftest$ac_exeext | grep "ac_lib_pattern\\.[[0-9A-Za-z.]]*dylib" | sed -e "s/^.*\/\(ac_lib_pattern\.[[0-9A-Za-z.]]*dylib\).*$/\1/"';2,$d'`]) ;;
-    *) AS_VAR_SET(ac_Lib,[`$ac_cv_path_LDD conftest$ac_exeext | grep "ac_lib_pattern\\.$LIBEXT" | sed -e "s/^.*\(ac_lib_pattern\.$LIBEXT[[^	 ]]*\).*$/\1/"';2,$d'`]) ;;
+    *) AS_VAR_SET(ac_Lib,[`$READELF -d conftest$ac_exeext | grep "NEEDED.*ac_lib_pattern\\.$LIBEXT" | sed -e "s/^.*\\m4_dquote(\\(ac_lib_pattern\\.$LIBEXT[[^	 ]]*\\)\\).*$/\1/"';2,$d'`])
+       AS_IF([test "x]AS_VAR_GET(ac_Lib)[" = x],
+             [AS_VAR_SET(ac_Lib,[`$LDD conftest$ac_exeext | grep "ac_lib_pattern\\.$LIBEXT" | sed -e "s/^.*\(ac_lib_pattern\.$LIBEXT[[^	 ]]*\).*$/\1/"';2,$d'`])]) ;;
   esac])
   LIBS=$ac_check_soname_save_LIBS])dnl
 AS_IF([test "x]AS_VAR_GET(ac_Lib)[" = "x"],

configure.ac

@@ -690,7 +690,7 @@ AC_SUBST(IMPLIBEXT,"def")
 AC_SUBST(LDRPATH_INSTALL,"")
 AC_SUBST(LDRPATH_LOCAL,"")
 STATIC_IMPLIBEXT="def.a"
-WINE_PATH_LDD
+WINE_PATH_SONAME_TOOLS
 
 case $host_os in
   cygwin*|mingw32*)