--- a/configure.ac	2026-10-19 22:23:45.472187310 +0200
+++ b/configure.ac	2026-10-19 22:23:45.542800436 +0200
@@ -755,7 +755,7 @@ AC_SUBST(CFG_LIBS)
 AC_DEFUN([_MY_CXX_CHECK_CXX_VER],
    [# _MY_CXX_CHECK_CXX_VER(flag) -- Check if compiler runs C++14
     # Set $_my_result
-    AC_RUN_IFELSE(
+    AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM([#include <thread>
 #if (__cplusplus < 201402L)
 # error "Too old"
@@ -763,7 +763,6 @@ AC_DEFUN([_MY_CXX_CHECK_CXX_VER],
     ], [[
      ]])],
      [_my_result=yes],
-     [_my_result=no],
      [_my_result=no])
    ])