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16.4.1 Testing C++ Implementations with AutoconfOf the GNU Autotools, perhaps the most valuable contribution to the portability of your C++ programs will come from Autoconf. All of the portability issues raised in 16.2 Changeable C++ can be detected using Autoconf macros.
Luc Maisonobe has written a large suite of macros for this purpose and
they can be found in the Autoconf macro archive (see section 23.5.1 Autoconf macro archive). If any of these macros become important enough, they may
become incorporated into the core Autoconf release. These macros
perform their tests by compiling small fragments of C++ code to ensure
that the compiler accepts them. As a side effect, these macros
typically use |