'make clean' does not remove all build artifacts since the switch to automake using current git master (37d699a scons: Add glsl/glcpp to the include path.)

what should work, but does not:

1. git clean -fdx 
2. autogen.sh --enable-32-bit ...
3. make && make install
4. make clean
5. autogen.sh ....
6. make -> fails

what still does work is:

1. git clean -fdx 
2. autogen.sh --enable-32-bit ...
3. make && make install
4. git clean -fdx
5. autogen.sh ....
6. make && make install

Log of the second make run (64bit after 32bit build):

../Makefile.dri:110: depend: No such file or directory
../Makefile.xvmc:73: depend: No such file or directory
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal 
main::scan_file() called too early to check prototype at /usr/bin/aclocal line 642.
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy
main::scan_file() called too early to check prototype at /usr/bin/aclocal line 642.
autoreconf: running: /usr/bin/autoconf
autoreconf: configure.ac: not using Autoheader
autoreconf: running: automake --add-missing --copy --no-force
autoreconf: Leaving directory `.'
configure: WARNING: Floating-point textures enabled.
configure: WARNING: Please consult docs/patents.txt with your lawyer before building Mesa.
ar: creating libglapi.a
glsl_lexer.cpp: In function 'int yy_get_next_buffer(yyscan_t)':
glsl_lexer.cpp:2880:3: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
ar: creating libglsl.a
main/ff_fragment_shader.cpp: In function 'ir_rvalue* emit_texenv(texenv_fragment_program*, GLuint)':
main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)rgb_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)rgb_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)rgb_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)alpha_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
ar: creating libmesa.a
ar: creating libmesagallium.a
./../main/ff_fragment_shader.cpp: In function 'ir_rvalue* emit_texenv(texenv_fragment_program*, GLuint)':
./../main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)rgb_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
./../main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)rgb_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
./../main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)rgb_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
./../main/ff_fragment_shader.cpp:894:3: warning: narrowing conversion of '(1 << ((int)alpha_shift))' from 'int' to 'float' inside { } is ill-formed in C++11 [-Wnarrowing]
glsl_lexer.cpp: In function 'int yy_get_next_buffer(yyscan_t)':
glsl_lexer.cpp:2880:3: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
platform_x11.c: In function 'dri2_create_surface':
platform_x11.c:208:27: warning: assignment makes integer from pointer without a cast [enabled by default]
platform_x11.c: In function 'dri2_copy_buffers':
platform_x11.c:847:4: warning: passing argument 3 of 'xcb_create_gc' makes integer from pointer without a cast [enabled by default]
In file included from /usr/include/xcb/xcb.h:182:0,
                 from egl_dri2.h:32,
                 from platform_x11.c:40:
/usr/include/xcb/xproto.h:10286:1: note: expected 'xcb_drawable_t' but argument is of type 'EGLNativePixmapType'
platform_x11.c:855:5: warning: passing argument 3 of 'xcb_copy_area' makes integer from pointer without a cast [enabled by default]
In file included from /usr/include/xcb/xcb.h:182:0,
                 from egl_dri2.h:32,
                 from platform_x11.c:40:
/usr/include/xcb/xproto.h:10734:1: note: expected 'xcb_drawable_t' but argument is of type 'EGLNativePixmapType'
libnurbs/interface/insurfeval.cc: In member function 'void OpenGLSurfaceEvaluator::inEvalUStrip(int, REAL, REAL*, int, REAL, REAL*)':
libnurbs/interface/insurfeval.cc:1169:8: warning: variable 'leftMostV' set but not used [-Wunused-but-set-variable]
libnurbs/interface/insurfeval.cc: In member function 'void OpenGLSurfaceEvaluator::inEvalVStrip(int, REAL, REAL*, int, REAL, REAL*)':
libnurbs/interface/insurfeval.cc:1358:8: warning: variable 'botMostV' set but not used [-Wunused-but-set-variable]
libnurbs/nurbtess/directedLine.cc: In function 'directedLine* readAllPolygons(char*)':
libnurbs/nurbtess/directedLine.cc:797:7: warning: variable 'result' set but not used [-Wunused-but-set-variable]
libnurbs/nurbtess/sampleCompTop.cc: In function 'void sampleCompTop(Real*, vertexArray*, Int, vertexArray*, Int, gridBoundaryChain*, gridBoundaryChain*, Int, Int, Int, Int, Int, primStream*)':
libnurbs/nurbtess/sampleCompTop.cc:514:13: warning: variable 'tempTop' set but not used [-Wunused-but-set-variable]
libnurbs/nurbtess/sampleCompTop.cc:515:11: warning: variable 'tempLeftStart' set but not used [-Wunused-but-set-variable]
ar: creating libgallium.a
evergreen_compute_internal.c: In function 'evergreen_set_rat':
evergreen_compute_internal.c:306:6: warning: 'fmt.number_type' may be used uninitialized in this function [-Wmaybe-uninitialized]
evergreen_compute_internal.c:305:6: warning: 'fmt.format' may be used uninitialized in this function [-Wmaybe-uninitialized]
ar: creating librbug.a
sp_quad_blend.c: In function 'blend_fallback':
sp_quad_blend.c:767:10: warning: 'quadColor2' may be used uninitialized in this function [-Wmaybe-uninitialized]
sp_quad_blend.c:952:18: note: 'quadColor2' was declared here
ar: creating libsoftpipe.a
ar: creating libtrace.a
ar: creating libdridrm.a
ar: creating libdrisw.a
x11/native_ximage.c: In function 'ximage_display_copy_to_pixmap':
x11/native_ximage.c:475:27: warning: 'xconf' may be used uninitialized in this function [-Wmaybe-uninitialized]
drm/native_drm.c: In function 'native_create_display':
drm/native_drm.c:182:21: warning: 'device' may be used uninitialized in this function [-Wmaybe-uninitialized]
drm/native_drm.c:159:24: note: 'device' was declared here
ar: creating libegl.a
ar: creating libgbm.a
ar: creating libxvmctracker.a
ar: creating libradeonwinsys.a
ar: creating libws_null.a
ar: creating libwsw.a
ar: creating libws_xlib.a
ar: creating libswdri.a
../Makefile.dri:110: depend: No such file or directory
/usr/lib64/gcc/x86_64-suse-linux/4.7/../../../../x86_64-suse-linux/bin/ld: i386 architecture of input file `../../../../src/mesa/drivers/dri/common/utils.o' is incompatible with i386:x86-64 output
/usr/lib64/gcc/x86_64-suse-linux/4.7/../../../../x86_64-suse-linux/bin/ld: i386 architecture of input file `../../../../src/mesa/drivers/dri/common/dri_util.o' is incompatible with i386:x86-64 output
/usr/lib64/gcc/x86_64-suse-linux/4.7/../../../../x86_64-suse-linux/bin/ld: i386 architecture of input file `../../../../src/mesa/drivers/dri/common/xmlconfig.o' is incompatible with i386:x86-64 output
collect2: error: ld returned 1 exit status
g++: error: r600_dri.so.tmp: No such file or directory
gmake[3]: *** [r600_dri.so] Error 1
gmake[2]: *** [default] Error 1
gmake[1]: *** [all-recursive] Error 1
make: *** [all-recursive] Error 1