Thanks very much for the ideas. I looked it up but can't find anything unusual: My include path reads as follows: C:/MinGW/bin/../libexec/gcc/mingw32/3.4.5/cc1.exe -E -quiet -v -iprefix C:\MinGW\bin\../lib/gcc/mingw32/3.4.5/ - ignoring nonexistent directory "C:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../mingw32/include" ignoring nonexistent directory "/mingw/lib/gcc/mingw32/3.4.5/../../../../mingw32/include" #include "..." search starts here: #include <...> search starts here: C:/MinGW/bin/../lib/gcc/mingw32/3.4.5/../../../../include C:/MinGW/bin/../lib/gcc/mingw32/3.4.5/include /mingw/lib/gcc/mingw32/3.4.5/../../../../include /mingw/include /mingw/lib/gcc/mingw32/3.4.5/include /mingw/include End of search list. And this is the assert.h: /* * assert.h * This file has no copyright assigned and is placed in the Public Domain. * This file is a part of the mingw-runtime package. * No warranty is given; refer to the file DISCLAIMER within the package. * * Define the assert macro for debug output. * */ /* We should be able to include this file multiple times to allow the assert macro to be enabled/disabled for different parts of code. So don't add a header guard. */ #ifndef RC_INVOKED /* All the headers include this file. */ #include <_mingw.h> #undef assert #ifdef __cplusplus extern "C" { #endif #ifdef NDEBUG /* * If not debugging, assert does nothing. */ #define assert(x) ((void)0) #else /* debugging enabled */ /* * CRTDLL nicely supplies a function which does the actual output and * call to abort. */ _CRTIMP void __cdecl __MINGW_NOTHROW _assert (const char*, const char*, int) __MINGW_ATTRIB_NORETURN; /* * Definition of the assert macro. */ #define assert(e) ((e) ? (void)0 : _assert(#e, __FILE__, __LINE__)) #endif /* NDEBUG */ #ifdef __cplusplus } #endif #endif /* Not RC_INVOKED */

Well, the is in scoped_array then. But I looked there too, and it uses BOOST_ASSERT just fine. If you look into on your system, then it should contain the assert() macro. Could it be that your include path is wrong or garbled?

-Thorsten

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