Phil Hystad wrote:

Does anyone know the definition of REG_PERLEX?

I am using the regex/regcomp traditional unix/posix API supported by Boost Regular Expression library. On a Windows 32 bit platform we are forced to use REG_PERLEX on the regcomp flags argument whereas for the same application we get by using a zero flag value on regcomp on platforms: Mac OS X and Linux.

REG_PERLEX allows the engine to accept Perl style regular expressions - what kind of expressions are you using, and what differences do you observe on the different platforms - there shouldn't really be any difference in behaviour. John.