can't build with windows10 x86 and mingw32

[DeJoker]

creating build\temp.win-amd64-2.7\Release\src\bjam
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/bjam.c -o build\temp.win-amd64-2.7\Release\src\bjam\bjam.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/rules.c -o build\temp.win-amd64-2.7\Release\src\bjam\rules.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/hash.c -o build\temp.win-amd64-2.7\Release\src\bjam\hash.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/modules.c -o build\temp.win-amd64-2.7\Release\src\bjam\modules.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/frames.c -o build\temp.win-amd64-2.7\Release\src\bjam\frames.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/constants.c -o build\temp.win-amd64-2.7\Release\src\bjam\constants.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/lists.c -o build\temp.win-amd64-2.7\Release\src\bjam\lists.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/timestamp.c -o build\temp.win-amd64-2.7\Release\src\bjam\timestamp.o
C:\MinGW\bin\gcc.exe -mdll -O -Wall -DHAVE_PYTHON -DOPT_SEMAPHORE -DOPT_GRAPH_DEBUG_EXT -IC:\Python27\include -IC:\Python27\PC -c src/bjam/function.c -o build\temp.win-amd64-2.7\Release\src\bjam\function.o
src/bjam/function.c: In function 'argument_list_check':
src/bjam/function.c:3112:20: warning: variable 'value' set but not used [-Wunused-but-set-variable]
LIST * value = 0;
^~~~~
src/bjam/function.c: In function 'function_run':
src/bjam/function.c:4143:21: error: 'saved_stack' undeclared (first use in this function)
if ( !( saved_stack == s->data ) )
^~~~~~~~~~~
src/bjam/function.c:4143:21: note: each undeclared identifier is reported only once for each function it appears in
error: command 'C:\MinGW\bin\gcc.exe' failed with exit status 1