make -f posix.mak AUTO_BOOTSTRAP=1
make -C src -f posix.mak
make[1]: Entering directory '/home/soenke/Downloads/dmd-2.071.2/src'
no cpu specified, assuming X86
  (CC)  BACK_OBJS  backend/go.c
c++ -c -Wno-deprecated -Wstrict-aliasing -fno-exceptions -fno-rtti -D__pascal= -DMARS=1 -DTARGET_LINUX=1 -DDM_TARGET_CPU_X86=1 -m64 -Iroot -Itk -Ibackend -I. -DDMDV2=1 -MMD -MF go.deps backend/go.c
backend/go.c: In function ‘int go_flag(char*)’:
backend/go.c:82:5: error: narrowing conversion of ‘-1’ from ‘int’ to ‘mftype {aka unsigned int}’ inside { } [-Wnarrowing]
     };
     ^
posix.mak:435: recipe for target 'go.o' failed
make[1]: *** [go.o] Error 1
make[1]: Leaving directory '/home/soenke/Downloads/dmd-2.071.2/src'
posix.mak:8: recipe for target 'all' failed
make: *** [all] Error 2