CVS commit by mueller: 

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  M +6 -0      acinclude.m4.in   2.511


--- kde-common/admin/acinclude.m4.in  #2.510:2.511
@@ -2914,4 +2914,10 @@
   AC_MSG_CHECKING([whether $CC is blacklisted])
 
+  dnl In theory we have tu run this test against $CC and $CXX
+  dnl in C and in C++ mode, because its perfectly legal for
+  dnl the user to mix compiler versions, since C has a defined
+  dnl ABI. 
+  dnl 
+  dnl For now, we assume the user is not on crack.
 
   AC_TRY_COMPILE([