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From: "joseph at codesourcery dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/52764] Including <cstdint> after <stdint.h> fails to define limit macros
Date: Sat, 07 Apr 2012 16:07:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52764

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-04-07 16:06:46 UTC ---
My previous suggestion stands of having the compiler predefine 
__STDC_LIMIT_MACROS and __STDC_CONSTANT_MACROS, whether for C++11 or 
generally for C++, to make all existing stdint.h headers work as desired.  
You could predefine in the compiler, or you could predefine in 
stdint-wrap.h when it includes a system stdint.h and remove the 
conditionals in stdint-gcc.h.  (In the header might be better because then 
you can use #ifndef to avoid any conflict with a user's definition of 
those macros.)

If the libstdc++ people conclude that these definitions should be present 
for all C++ versions, not just C++11, then the conditionals in glibc's 
stdint.h can be removed at leisure (the predefines in GCC will make the 
conditionals useless but harmless).