FTBFS: INT64_MIN not defined. #637

I get errors from net.cpp and other modules (see below) about INT64_MIN and other constants not being defined. Including <inttypes.h>, <stdint.h>, or <limits.h> doesn't help, and neither does #defining __STDC_LIMIT_MACROS. These headers seem to work differently in C++ from C.

To make the modules compile, I had to write a header that #defines these constants in terms of the C++ numeric_limits template:

<pre> #ifndef CPPLIMITS_H #define CPPLIMITS_H #include &lt;limits&gt; #include &lt;inttypes.h&gt; #define INT64_MAX std::numeric_limits&lt;int64&gt;::max() #define INT64_MIN std::numeric_limits&lt;int64&gt;::min() #define UINT64_MIN std::numeric_limits&lt;uint64&gt;::min() #define UINT64_MAX std::numeric_limits&lt;uint64&gt;::max() #endif </pre>

The following source files needed to include this header:

<ul> <li> net.cpp</li> <li> wallet.cpp</li> <li> util.cpp</li> </ul>

Related: #645

According to a quick google, INT64_MIN should be defined in <stdint.h>. I checked on my own system and this seems to be the case:

$ grep INT64_MIN /usr/include/stdint.h 
# define INT64_MIN      (-__INT64_C(9223372036854775807)-1)

What OS/compiler is this? Can you look in your stdint.h to see whether it is defined but guarded for some reason? Or not defined there at all?

OS/Compiler is Debian Lenny and GCC 4.3.2.

INT64_MIN and related constants from /usr/include/stdint.h are guarded with:

<code>#if !defined __cplusplus || defined __STDC_LIMIT_MACROS</code>

The guard also appears on Debian Sid with GCC 4.6.1.

__STDC_LIMIT_MACROS must be defined before the <i>first</i> inclusion of &lt;stdint.h&gt;, which in the Bitcoin code occurs indirectly through Boost.

Latest code doesn't use INT64_anything (it uses std::numeric_limits<> instead).