Merged revision(s) 21852 from trunk/OpenMPT:

[Var] build: Autotools: Update ax_cxx_compile_stdcxx.m4 to version 25.
........


git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.31@21853 56274372-70c3-4bfc-bfc3-4c3a0b034d27

build/autotools/ax_cxx_compile_stdcxx.m4

@@ -44,7 +44,7 @@
 # and this notice are preserved. This file is offered as-is, without any
 # warranty.
 
-#serial 24
+#serial 25
 
 dnl This macro is based on the code from the AX_CXX_COMPILE_STDCXX_11 macro
 dnl (serial version number 13).
@@ -191,11 +191,11 @@ m4_define([_AX_CXX_COMPILE_STDCXX_testbody_20],
 dnl Test body for checking C++23 support
 
 m4_define([_AX_CXX_COMPILE_STDCXX_testbody_23],
- _AX_CXX_COMPILE_STDCXX_testbody_new_in_11
- _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
- _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
- _AX_CXX_COMPILE_STDCXX_testbody_new_in_20
- _AX_CXX_COMPILE_STDCXX_testbody_new_in_23
+ [_AX_CXX_COMPILE_STDCXX_testbody_new_in_11
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_14
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_17
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_20
+  _AX_CXX_COMPILE_STDCXX_testbody_new_in_23]
 )