Hi folks, My C++ Windows/Linux project used to compile properly using the following items: * Boost 1.33.1, using BGL, Serialization, Thread ; * GNU g++ 4.1.2 under Linux ; * MinGW 3.4.5 under Linux (cross-compiling). I recently updated my Boost distribution to version 1.44. Unfortunately, I now have the following BGL/linking error compiling with MinGW : /path/to/liblocd_topology_manager.a(locTopology.o):locTopology.cpp:(.rdata$_ ZZN5boost3putINS_26vec_adj_list_vertex_id_mapINS_8propertyINS_13vertex_root_ tEiNS_11no_propertyEEEjEEEEvRKNS_17two_bit_color_mapIT_EENS_15property_trait sIS8_E8key_typeENS_18two_bit_color_typeEE17elements_per_char+0x0): multiple definition of `_elements_per_char' /path/to/liblocd_topology_manager.a(locTopology.o):locTopology.cpp:(.rdata$_ ZZN5boost3putINS_26vec_adj_list_vertex_id_mapINS_8propertyINS_13vertex_root_ tEiNS_11no_propertyEEEjEEEEvRKNS_17two_bit_color_mapIT_EENS_15property_trait sIS8_E8key_typeENS_18two_bit_color_typeEE17elements_per_char+0x0): first defined here I've checked the //www.boost.org/doc/libs/1_44_0/libs/graph/doc/trouble_shooting.html webpage, but I haven't seen any answer related to my problem. For sure, the MinGW compiler version we use is pretty old. Since updating it would be very cumbersome in our case, I would like to be sure it's actually a compiler issue. Thanks in advance for your advice. Best regards, -- Florian PONROY Thales Land & Joint France Tel. : +33(0)1 41 304 363 Fax : +33(0)1 41 303 907 Email : florian.ponroy@fr.thalesgroup.com