id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
7482	Build from source with MinGW on Windows	RusBaratov@…	timblechmann	" Hello, I've trying to build boost with mingw, and I've got error, when `--layout=system` option is used.

check out (with cygwin):

{{{
> svn co http://svn.boost.org/svn/boost/trunk boost-trunk
> svnversion
80897
}}}


build (windows cmd.exe):

{{{
> g++ --version
g++ (Built by MinGW-builds projects) 4.7.1
> cd boost-trunk
> .\bootstrap gcc
}}}


build with `--layout=tagged` works fine:

{{{
> .\b2 --toolset=gcc --layout=tagged
}}}


but build with `--layout=system` failed:

{{{
> .\b2 --toolset=gcc --layout=system
...
error: Duplicate name of actual target: <pstage\lib>libboost_atomic.a
error: previous virtual target { common%common.copy-libboost_atomic.a.STATIC_LIB { gcc%gcc.archive-libboost_atomic.a.STATIC_LIB { gcc%gcc.compile.c++-
lockpool.o.OBJ { lockpool.cpp.CPP } } } }
error: created from ./stage-proper
error: another virtual target { common%common.copy-libboost_atomic.a.STATIC_LIB { gcc%gcc.archive-libboost_atomic.a.STATIC_LIB { gcc%gcc.compile.c++-l
ockpool.o.OBJ { lockpool.cpp.CPP } } } }
error: created from ./stage-proper
error: added properties: <debug-symbols>off <define>NDEBUG <inlining>full <optimization>speed <runtime-debugging>off <variant>release
error: removed properties: <debug-symbols>on <inlining>off <optimization>off <runtime-debugging>on <variant>debug
M:/boost-trunk/tools/build/v2/build\virtual-target.jam:491: in actualize-no-scanner from module object(file-target)@4808
M:/boost-trunk/tools/build/v2/build\virtual-target.jam:134: in object(file-target)@4808.actualize from module object(file-target)@4808
M:/boost-trunk/tools/build/v2\build-system.jam:736: in load from module build-system
M:\boost-trunk\tools\build\v2/kernel\modules.jam:289: in import from module modules
M:\boost-trunk\tools\build\v2/kernel/bootstrap.jam:139: in boost-build from module
M:\boost-trunk\boost-build.jam:17: in module scope from module
}}}
"	Bugs	new	To Be Determined	Building Boost	Boost Development Trunk	Problem		mingw windows layout system