Hi, On HP-UX 11.11, there is a weird definition of WCHAR_MIN: $ grep WCHAR_MIN /usr/include/*.h /usr/include/wchar.h:# define WCHAR_MIN (wchar_t)0 When using gcc-4.1.1 on this platform, each time WCHAR_MIN is tested by preprocessor-directive against zero, g++ spits: gcc-C++-action ../../../bin/boost/libs/regex/build/libboost_regex.a/gcc/debug/c_regex_traits.o In file included from ../src/c_regex_traits.cpp:29: <snip>/boost_1_34_0rc/boost/regex/v4/regex_traits_defaults.hpp:87:94: error: missing binary operator before token "0" This appears in boost/regex/v4/perl_matcher.hpp: line 53 and boost/regex/v4/regex_traits_defaults.hpp: line 87 Both of them are hidden for aCC with "#if !defined(__HP_aCC)", so maybe they should also be hidden for gcc on hpux ? This problem does not appear with gcc-3.4.5 because of this: gcc-3.4.5 (don't exactly know until which version) did not define _INCLUDE__STDC_A1_SOURCE as builtin, which enables that definition of WCHAR_MIN in /usr/include/wchar.h Initially I had this with 1.33.0, but it is the same for rc-1.34.0. Thanks, haubi -- Michael Haubenwallner SALOMON Automation GmbH Forschung & Entwicklung A-8114 Friesach bei Graz mailto:michael.haubenwallner@salomon.at http://www.salomon.at No HTML/MIME please, see http://expita.com/nomime.html