On Dec 4, 2007 6:54 AM, Sid Sacek <ssacek@appsecinc.com> wrote:
Other compilers don't have this built-in macro, but it seems to me that you can create something useful with compiler arguments. For example:
g++ main.cpp -D_FILE_ORDINAL_=10000
You also need these macros somewhere that use the ordinal value as follows:
#define _COUNTER3( O, L ) O##L #define _COUNTER2( O, L ) _COUNTER3( O, L ) #define _COUNTER _COUNTER2( _FILE_ORDINAL_, __LINE__ )
If every compiled file gets its own large ordinal number, you should never have the same value for _COUNTER twice.
__LINE__ is not unique in a translation unit. For each included header, it is restarted from 1. So if you happen to use _COUNTER in two boost header files at the same line, and the two headers are included by the same c++ file, you end up with clashing counters. Corrado