diff --git a/configure.ac b/configure.ac
index 67d6bc4..29e0e70 100644
--- a/configure.ac
+++ b/configure.ac
@@ -36,7 +36,7 @@ AC_CHECK_HEADER_STDBOOL
 AC_PROG_CC
 AC_FUNC_ALLOCA
 
-AS_IF([test "x$disable_struct_support" == "xyes"], [
+AS_IF([test "x$disable_struct_support" = "xyes"], [
     AC_FUNC_OBSTACK
 ])
 
@@ -65,86 +65,10 @@ AC_CHECK_MEMBER([struct builtin.name],
 
 AM_CONDITIONAL([ENABLE_STRUCTS], [test "x$disable_struct_support" != "xyes"])
 
-# Does enable -f work with a very simple plugin?
-LDFLAGS="${LDFLAGS} -shared -fPIC"
-
-AC_MSG_CHECKING([whether a minimal bash plugin compiles])
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-    #include <stddef.h>
-    #include <unistd.h>
-
-    #include "builtins.h"
-
-    int conftest_function(WORD_LIST *list)
-    {
-        exit(EXIT_SUCCESS);
-    }
-
-    struct builtin conftest_struct = {
-        .name       = "conftest",
-        .function   = conftest_function,
-        .flags      = BUILTIN_ENABLED,
-        .long_doc   = NULL,
-        .short_doc  = NULL,
-        .handle     = NULL,
-    };
-]])], [
-    AC_MSG_RESULT([yes])
-    AC_MSG_CHECKING([loading simple plugin])
-    if bash -c "enable -f ./conftest${ac_exeext} conftest && conftest || exit 1"; then
-        AC_MSG_RESULT([yes])
-    else
-        AC_MSG_RESULT([no])
-        AC_MSG_FAILURE([bash plugins do not appear to work], 1)
-    fi
-], [
-    AC_MSG_RESULT([no])
-    AC_MSG_FAILURE([unable to build a test extension], 1)
-])
-
-# If this test fails, the distribution has built bash incorrectly and may need
-# to append -Wl,-export-dynamic to the linker command line. Without exported
-# symbols, plugins cannot interact with bash.
-AC_MSG_CHECKING([whether bash symbols are exported])
-AC_LINK_IFELSE([AC_LANG_SOURCE([[
-    #include <stddef.h>
-    #include <unistd.h>
-
-    #include "builtins.h"
-
-    int conftest_function(WORD_LIST *list)
-    {
-        exit(num_shell_builtins
-                ? EXIT_SUCCESS
-                : EXIT_FAILURE);
-    }
-
-    struct builtin conftest_struct = {
-        .name       = "conftest",
-        .function   = conftest_function,
-        .flags      = BUILTIN_ENABLED,
-        .long_doc   = NULL,
-        .short_doc  = NULL,
-        .handle     = NULL,
-    };
-]])], [
-    AC_MSG_RESULT([yes])
-    AC_MSG_CHECKING([loading plugin with external references])
-    if bash -c "enable -f ./conftest${ac_exeext} conftest && conftest || exit 1"; then
-        AC_MSG_RESULT([yes])
-    else
-        AC_MSG_RESULT([no])
-        AC_MSG_FAILURE([report this bug to your distribution; bash may be built incorrectly], 1)
-    fi
-], [
-    AC_MSG_RESULT([no])
-    AC_MSG_FAILURE([unable to build a test extension], 1)
-])
-
 LDFLAGS="${SAVED_LDFLAGS}"
 CPPFLAGS="${SAVED_CPPFLAGS}"
 
-AS_IF([test "x$disable_struct_support" == "xyes"], [
+AS_IF([test "x$disable_struct_support" = "xyes"], [
       AS_BOX([!!! AUTOMATIC STRUCT SUPPORT IS DISABLED DUE TO MISSING DEPENDENCIES !!!], [*])
       AC_SUBST([struct], [])
       AC_SUBST([sizeof], [])