build: remove check for __attribute__((visibility..

Author: fanquake

configure.ac

@@ -943,23 +943,6 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  [ AC_MSG_RESULT([no])]
 )
 
-AC_MSG_CHECKING([for default visibility attribute])
-AC_COMPILE_IFELSE([AC_LANG_SOURCE([
-  int foo(void) __attribute__((visibility("default")));
-  int main(){}
-  ])],
-  [
-    AC_DEFINE([HAVE_DEFAULT_VISIBILITY_ATTRIBUTE], [1], [Define if the visibility attribute is supported.])
-    AC_MSG_RESULT([yes])
-  ],
-  [
-    AC_MSG_RESULT([no])
-    if test "$use_reduce_exports" = "yes"; then
-      AC_MSG_ERROR([Cannot find a working visibility attribute. Use --disable-reduce-exports.])
-    fi
-  ]
-)
-
 AC_MSG_CHECKING([for dllexport attribute])
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
   __declspec(dllexport) int foo(void);