Hello boost comunity, I found a warning using boost/multi-array (boost 1.53) on mingw. The warning message : boost/multi_array/base.hpp:503:13: attention : unused variable 'bound_adjustment' When compiling a simple example including muti-array with the command line : c:\MinGW\bin\g++.exe -Wall -Wextra -O2 -DNDEBUG -g -Ic:/natifvle/install/boost/include/boost-1_53 -o MyExample.o -c MyExample.cpp The reason is that a locale variable bound_adjustement, before line 503 of multi_array/base.hpp, is defined and computed only if BOOST_DISABLE_ASSERT is not set. The line after, a BOOST_ASSERT is called using bound_adjustement. Since BOOST_DISABLE_ASSERT is not set, BOOST_ASSERT is defined as the mingw macro "assert" in boost/assert.hpp. Finally, mingw assert macro (see Mingw/include/assert.h) is defined as ((void) 0) if NDEBUG is defined (this is the case in my example). It took me a long time to see the problem. So my questions are : - Do I miss use the combination of NDEBUG and BOOST_DISABLE_ASSERTS ? Eg. if NDEBUG and BOOST_DISABLE_ASSERTS are set (or unset) together, then I have no warning. Should they be set to the same value ? - Or should boost/assert.hpp take into account NDEBUG for defining the macro BOOST_ASSERT (only for mingw ?) Best regards Ronan Trépos -- Trépos Ronan INRA unité MIAT, équipe RECORD, Toulouse http://carlit.toulouse.inra.fr/wikiz/index.php/Ronan_TREPOS tel : 05 61 28 51 89