diff --git a/contrib/sdk/sources/newlib/libc/Tupfile.lua b/contrib/sdk/sources/newlib/libc/Tupfile.lua
new file mode 100644
index 0000000000..47f98440e0
--- /dev/null
+++ b/contrib/sdk/sources/newlib/libc/Tupfile.lua
@@ -0,0 +1,186 @@
+if tup.getconfig("NO_GCC") ~= "" or tup.getconfig("NO_FASM") ~= "" then return end
+tup.include("../../../../../programs/use_gcc.lua")
+CFLAGS = CFLAGS_OPTIMIZE_SPEED .. " -c -DBUILD_DLL -DMISSING_SYSCALL_NAMES"
+LDFLAGS = "-shared -s -T libcdll.lds --out-implib $(SDK_DIR)/lib/libc.dll.a --image-base 0"
+-- LDFLAGS = LDFLAGS .. " --output-def libc.orig.def"
+
+SDK_DIR = "../../.."
+
+LIBC_TOPDIR = "."
+LIBC_INCLUDES = "include"
+NAME = "libc"
+DEFINES = "-D_IEEE_LIBM"
+INCLUDES = "-Iinclude"
+
+TOOLCHAIN_LIBPATH = tup.getconfig("TOOLCHAIN_LIBPATH")
+-- if not given explicitly in config, try to guess
+if TOOLCHAIN_LIBPATH == "" then
+  if tup.getconfig("TUP_PLATFORM") == "win32"
+  then TOOLCHAIN_LIBPATH="C:\\MinGW\\msys\\1.0\\home\\autobuild\\tools\\win32\\mingw32\\lib"
+  else TOOLCHAIN_LIBPATH="/home/autobuild/tools/win32/mingw32/lib"
+  end
+end
+LIBPATH = "-L$(SDK_DIR)/lib -L$(TOOLCHAIN_LIBPATH)"
+STATIC_SRCS = {"crt/start.S", "crt/crt1.c", "crt/crt2.c", "crt/chkstk.S", "crt/exit.c", "pe/crtloader.c"}
+LIBDLL_SRCS = {"crt/dllstart.c", "crt/chkstk.S", "crt/exit.S", "crt/pseudo-reloc.c", "crt/setjmp.S"}
+LIBCDLL_SRCS = {"crt/crtdll.c", "crt/pseudo-reloc.c", "crt/chkstk.S", "crt/exit.S", "pe/loader.c"}
+LIBCRT_SRCS = {"crt/start.S", "crt/chkstk.S", "crt/crt3.c", "crt/pseudo-reloc.c", "pe/crtloader.c"}
+CORE_SRCS = {
+  "argz/buf_findstr.c", "argz/envz_get.c",
+  "crt/emutls.c", "crt/thread.S", "crt/tls.S", "crt/setjmp.S", "crt/cpu_features.c",
+  "ctype/ctype_.c", "ctype/isascii.c", "ctype/isblank.c", "ctype/isalnum.c",
+  "ctype/isalpha.c", "ctype/iscntrl.c", "ctype/isdigit.c", "ctype/islower.c",
+  "ctype/isupper.c", "ctype/isprint.c", "ctype/ispunct.c", "ctype/isspace.c",
+  "ctype/iswctype.c", "ctype/iswalnum.c", "ctype/iswalpha.c", "ctype/iswblank.c",
+  "ctype/iswcntrl.c", "ctype/iswdigit.c", "ctype/iswgraph.c", "ctype/iswlower.c",
+  "ctype/iswprint.c", "ctype/iswpunct.c", "ctype/iswspace.c", "ctype/iswupper.c",
+  "ctype/iswxdigit.c", "ctype/isxdigit.c", "ctype/toascii.c", "ctype/tolower.c",
+  "ctype/toupper.c", "ctype/towctrans.c", "ctype/towlower.c", "ctype/towupper.c",
+  "ctype/wctrans.c", "ctype/wctype.c",
+  "errno/errno.c",
+  "locale/locale.c", "locale/lctype.c", "locale/ldpart.c",
+  "reent/impure.c", "reent/init_reent.c", "reent/getreent.c", "reent/mutex.c",
+  "reent/gettimeofdayr.c", "reent/isattyr.c", "reent/openr.c", "reent/closer.c",
+  "reent/linkr.c", "reent/readr.c", "reent/lseekr.c", "reent/fstatr.c",
+  "reent/writer.c", "reent/timesr.c", "reent/unlinkr.c",
+  "search/qsort.c", "search/bsearch.c",
+  "signal/signal.c",
+  "sys/close.c", "sys/create.c", "sys/delete.c", "sys/errno.c", "sys/finfo.c",
+  "sys/fsize.c", "sys/fstat.c", "sys/gettod.c", "sys/io.c", "sys/ioread.c",
+  "sys/iowrite.c", "sys/isatty.c", "sys/lseek.c", "sys/open.c", "sys/read.c",
+  "sys/unlink.c", "sys/write.c", "sys/io_alloc.S",
+  "time/asctime.c", "time/asctime_r.c", "time/clock.c", "time/ctime.c",
+  "time/ctime_r.c", "time/difftime.c", "time/gettzinfo.c", "time/gmtime.c",
+  "time/gmtime_r.c", "time/mktime.c", "time/mktm_r.c", "time/lcltime.c",
+  "time/lcltime_r.c", "time/strftime.c", "time/time.c", "time/timelocal.c",
+  "time/tzlock.c", "time/tzvars.c"
+}
+STDLIB_SRCS = {
+  "__atexit.c", "__call_atexit.c", "abort.c", "abs.c", "assert.c", "atexit.c",
+  "atof.c", "atoi.c", "atol.c", "div.c", "dtoa.c", "dtoastub.c", "exit.c",
+  "gdtoa-gethex.c", "gdtoa-hexnan.c", "getenv.c", "mprec.c", "mbtowc.c",
+  "mbtowc_r.c", "mbrtowc.c", "mlock.c", "calloc.c", "malloc.c", "mallocr.c",
+  "rand.c", "rand_r.c", "rand48.c", "realloc.c", "seed48.c", "srand48.c",
+  "strtod.c", "strtol.c", "strtold.c", "strtoll.c", "strtoll_r.c", "strtoul.c",
+  "strtoull.c", "strtoull_r.c", "system.c", "wcrtomb.c", "wctomb_r.c"
+}
+STRING_SRCS = {
+  "memcpy.c", "memcmp.c", "memmove.c", "memset.c", "memchr.c", "stpcpy.c",
+  "stpncpy.c", "strcat.c", "strchr.c", "strcmp.c", "strcoll.c", "strcasecmp.c",
+  "strncasecmp.c", "strncat.c", "strncmp.c", "strncpy.c", "strndup.c",
+  "strndup_r.c", "strnlen.c", "strcasestr.c", "strdup.c", "strdup_r.c",
+  "strerror.c", "strlen.c", "strrchr.c", "strpbrk.c", "strsep.c", "strstr.c",
+  "strtok.c", "strtok_r.c", "strupr.c", "strcspn.c", "strspn.c", "strcpy.c",
+  "u_strerr.c"
+}
+
+STDIO_SRCS = {
+  "clearerr.c", "diprintf.c", "dprintf.c", "printf.c", "putchar.c", "fgetc.c",
+  "fgets.c", "fopen.c", "fclose.c", "fdopen.c", "fflush.c", "flags.c",
+  "fileno.c", "findfp.c", "fiprintf.c", "fiscanf.c", "fprintf.c", "fputc.c",
+  "fputs.c", "fputwc.c", "fread.c", "freopen.c", "fscanf.c", "fseek.c",
+  "fseeko.c", "ftell.c", "ftello.c", "fwrite.c", "fvwrite.c", "fwalk.c",
+  "putc.c", "puts.c", "refill.c", "rget.c", "remove.c", "setvbuf.c", "stdio.c",
+  "tmpfile.c", "tmpnam.c", "ungetc.c", "vasniprintf.c", "vasnprintf.c",
+  "vdprintf.c", "vdiprintf.c", "vscanf.c", "vsprintf.c", "vsnprintf.c",
+  "vsscanf.c", "makebuf.c", "wsetup.c", "wbuf.c", "sccl.c", "siprintf.c",
+  "sniprintf.c", "snprintf.c", "sprintf.c", "sscanf.c"
+}
+
+MATH_SRCS = {
+  "e_acos.c", "e_acosh.c", "e_asin.c", "e_atan2.c", "e_atanh.c", "e_cosh.c", "e_exp.c", "e_fmod.c",
+  "e_hypot.c", "e_j0.c", "e_j1.c", "e_jn.c", "e_log.c", "e_log10.c", "e_pow.c", "e_rem_pio2.c",
+  "e_remainder.c", "e_scalb.c", "e_sinh.c", "e_sqrt.c", "ef_acos.c", "ef_acosh.c", "ef_asin.c",
+  "ef_atan2.c", "ef_atanh.c", "ef_cosh.c", "ef_exp.c", "ef_fmod.c", "ef_hypot.c", "ef_j0.c", "ef_j1.c",
+  "ef_jn.c", "ef_log.c", "ef_log10.c", "ef_pow.c", "ef_rem_pio2.c", "ef_remainder.c", "ef_scalb.c",
+  "ef_sinh.c", "ef_sqrt.c", "er_gamma.c", "er_lgamma.c", "erf_gamma.c", "erf_lgamma.c", "f_exp.c",
+  "f_expf.c", "f_llrint.c", "f_llrintf.c", "f_llrintl.c", "f_lrint.c", "f_lrintf.c", "f_lrintl.c",
+  "f_pow.c", "f_powf.c", "f_rint.c", "f_rintf.c", "f_rintl.c", "k_cos.c", "k_rem_pio2.c", "k_sin.c",
+  "k_standard.c", "k_tan.c", "kf_cos.c", "kf_rem_pio2.c", "kf_sin.c", "kf_tan.c", "s_asinh.c",
+  "s_atan.c", "s_cbrt.c", "s_ceil.c", "s_copysign.c", "s_cos.c", "s_erf.c", "s_exp10.c", "s_expm1.c",
+  "s_fabs.c", "s_fdim.c", "s_finite.c", "s_floor.c", "s_fma.c", "s_fmax.c", "s_fmin.c", "s_fpclassify.c",
+  "s_frexp.c", "s_ilogb.c", "s_infconst.c", "s_infinity.c", "s_isinf.c", "s_isinfd.c", "s_isnan.c",
+  "s_isnand.c", "s_ldexp.c", "s_lib_ver.c", "s_llrint.c", "s_llround.c", "s_log1p.c", "s_log2.c",
+  "s_logb.c", "s_lrint.c", "s_lround.c", "s_matherr.c", "s_modf.c", "s_nan.c", "s_nearbyint.c",
+  "s_nextafter.c", "s_pow10.c", "s_remquo.c", "s_rint.c", "s_round.c", "s_scalbln.c", "s_scalbn.c",
+  "s_signbit.c", "s_signif.c", "s_sin.c", "s_tan.c", "s_tanh.c", "s_trunc.c", "scalblnl.c", "scalbnl.c",
+  "sf_asinh.c", "sf_atan.c", "sf_cbrt.c", "sf_ceil.c", "sf_copysign.c", "sf_cos.c", "sf_erf.c",
+  "sf_exp10.c", "sf_expm1.c", "sf_fabs.c", "sf_fdim.c", "sf_finite.c", "sf_floor.c", "sf_fma.c",
+  "sf_fmax.c", "sf_fmin.c", "sf_fpclassify.c", "sf_frexp.c", "sf_ilogb.c", "sf_infinity.c",
+  "sf_isinf.c", "sf_isinff.c", "sf_isnan.c", "sf_isnanf.c", "sf_ldexp.c", "sf_llrint.c",
+  "sf_llround.c", "sf_log1p.c", "sf_log2.c", "sf_logb.c", "sf_lrint.c", "sf_lround.c", "sf_modf.c",
+  "sf_nan.c", "sf_nearbyint.c", "sf_nextafter.c", "sf_pow10.c", "sf_remquo.c", "sf_rint.c",
+  "sf_round.c", "sf_scalbln.c", "sf_scalbn.c", "sf_signif.c", "sf_sin.c", "sf_tan.c", "sf_tanh.c",
+  "sf_trunc.c", "w_acos.c", "w_acosh.c", "w_asin.c", "w_atan2.c", "w_atanh.c", "w_cosh.c", "w_drem.c",
+  "w_exp.c", "w_exp2.c", "w_fmod.c", "w_gamma.c", "w_hypot.c", "w_j0.c", "w_j1.c", "w_jn.c", "w_lgamma.c",
+  "w_log.c", "w_log10.c", "w_pow.c", "w_remainder.c", "w_scalb.c", "w_sincos.c", "w_sinh.c", "w_sqrt.c",
+  "w_tgamma.c", "wf_acos.c", "wf_acosh.c", "wf_asin.c", "wf_atan2.c", "wf_atanh.c", "wf_cosh.c",
+  "wf_drem.c", "wf_exp.c", "wf_exp2.c", "wf_fmod.c", "wf_gamma.c", "wf_hypot.c", "wf_j0.c", "wf_j1.c",
+  "wf_jn.c", "wf_lgamma.c", "wf_log.c", "wf_log10.c", "wf_pow.c", "wf_remainder.c", "wf_scalb.c",
+  "wf_sincos.c", "wf_sinh.c", "wf_sqrt.c", "wf_tgamma.c", "wr_gamma.c", "wr_lgamma.c", "wrf_gamma.c",
+  "wrf_lgamma.c",
+  "f_atan2.S", "f_atan2f.S", "f_frexp.S", "f_frexpf.S", "f_ldexp.S", "f_ldexpf.S", "f_log.S",
+  "f_log10.S", "f_log10f.S", "f_logf.S", "f_tan.S", "f_tanf.S"
+}
+
+function prepend(what, to)
+  local result = {}
+  for i,v in ipairs(to) do
+    table.insert(result, what .. v)
+  end
+  return result
+end
+
+-- make shared
+LIB_SRCS = LIBCDLL_SRCS
+
+LIB_SRCS += CORE_SRCS
+LIB_SRCS += prepend("stdio/", STDIO_SRCS)
+LIB_SRCS += prepend("string/", STRING_SRCS)
+LIB_SRCS += prepend("stdlib/", STDLIB_SRCS)
+LIB_SRCS += prepend("math/", MATH_SRCS)
+
+ALL_OBJS = {}
+function compile(list)
+  local result = {}
+  for i,v in ipairs(list) do
+    if ALL_OBJS[v] then
+      -- already compiled
+    elseif v:sub(-2) == ".c" or v:sub(-2) == ".S" then
+      ALL_OBJS[v] = tup.rule(v, "kos32-gcc $(CFLAGS) $(DEFINES) $(INCLUDES) -o %o %f", v:sub(1, -3) .. ".o")
+    elseif v:sub(-4) == ".asm" then
+      ALL_OBJS[v] = tup.rule(v, "fasm %f %o", v:sub(1, -5) .. ".obj")
+    end
+    result += ALL_OBJS[v]
+  end
+  return result
+end
+
+LIB_OBJS = compile(LIB_SRCS)
+LIBCRT_OBJS = compile(LIBCRT_SRCS)
+LIBDLL_OBJS = compile(LIBDLL_SRCS)
+
+vfprintf_extra_objs = {
+  {"-DFLOATING_POINT", "stdio/vfprintf.o"},
+  {"-DINTEGER_ONLY", "stdio/vfiprintf.o"},
+  {"-DSTRING_ONLY", "stdio/svfprintf.o"},
+  {"-DINTEGER_ONLY -DSTRING_ONLY", "stdio/svfiprintf.o"},
+}
+for i,v in ipairs(vfprintf_extra_objs) do
+  LIB_OBJS += tup.rule("stdio/vfprintf.c", "kos32-gcc $(CFLAGS) $(DEFINES) $(INCLUDES) -fshort-enums " .. v[1] .. " -c %f -o %o", v[2])
+end
+
+vfscanf_extra_objs = {
+  {"", "stdio/vfscanf.o"},
+  {"-DINTEGER_ONLY", "stdio/vfiscanf.o"},
+  {"-DSTRING_ONLY", "stdio/svscanf.o"},
+  {"-DINTEGER_ONLY -DSTRING_ONLY", "stdio/svfiscanf.o"},
+}
+for i,v in ipairs(vfscanf_extra_objs) do
+  LIB_OBJS += tup.rule("stdio/vfscanf.c", "kos32-gcc $(CFLAGS) $(DEFINES) $(INCLUDES) -fshort-enums " .. v[1] .. " -c %f -o %o", v[2])
+end
+
+tup.rule(LIB_OBJS, "kos32-ld " .. LDFLAGS .. " " .. LIBPATH .. " -o %o %f -lgcc --version-script libc.ver " .. tup.getconfig("KPACK_CMD"),
+  {SDK_DIR .. "/bin/libc.dll", extra_outputs = {SDK_DIR .. "/lib/libc.dll.a", SDK_DIR .. "/lib/<libc.dll.a>"}})
+tup.rule(LIBCRT_OBJS, "kos32-ar rcs %o %f", {SDK_DIR .. "/lib/libapp.a", extra_outputs = {SDK_DIR .. "/lib/<libapp.a>"}})
+tup.rule(LIBDLL_OBJS, "kos32-ar rcs %o %f", {SDK_DIR .. "/lib/libdll.a", extra_outputs = {SDK_DIR .. "/lib/<libdll.a>"}})
diff --git a/contrib/sdk/sources/newlib/libc/include/kos32sys.h b/contrib/sdk/sources/newlib/libc/include/kos32sys.h
index de445dd075..a7baa0bc44 100644
--- a/contrib/sdk/sources/newlib/libc/include/kos32sys.h
+++ b/contrib/sdk/sources/newlib/libc/include/kos32sys.h
@@ -99,7 +99,7 @@ static inline void DrawWindow(int x, int y, int w, int h, const char *name,
      "c"((y << 16) | ((h-1) & 0xFFFF)),
      "d"((style << 24) | (workcolor & 0xFFFFFF)),
      "D"(name),
-     "S"(0));
+     "S"(0) : "memory");
 };
 
 #define POS_SCREEN 0
@@ -275,7 +275,8 @@ void draw_text_sys(const char *text, int x, int y, int len, color_t color)
     "int $0x40"
     ::"a"(4),"d"(text),
       "b"((x << 16) | y),
-      "S"(len),"c"(color));
+      "S"(len),"c"(color)
+     :"memory");
 }
 
 static inline void yield(void)
diff --git a/data/Tupfile.lua b/data/Tupfile.lua
index 9ab5a1bee2..5b940f7893 100644
--- a/data/Tupfile.lua
+++ b/data/Tupfile.lua
@@ -97,11 +97,18 @@ if build_type == "it" then tup.append_table(img_files, {
 
 --[[
 Files to be included in kolibri.iso and distribution kit outside of kolibri.img.
+
 The first subitem of every item is name relative to the root of ISO or distribution kit,
 the second is name of local file.
+
 If the first subitem ends in /, the last component of local file name is appended.
 The last component of the second subitem may contain '*'; if so, it will be expanded
 according to usual rules, but without matching directories.
+
+Tup does not allow a direct dependency on a file that is generated in a directory
+other than where Tupfile.lua is and its children. Most files are generated
+in the directory with Tupfile.lua; for other files, the item should contain
+a named subitem "group=path/<groupname>" and the file should be put in <groupname>.
 --]]
 extra_files = {
  {"/", build_type .. "/distr_data/autorun.inf"},
@@ -137,7 +144,7 @@ extra_files = {
  {"kolibrios/lib/avformat-55.dll", "common/lib/avformat-55.dll"},
  {"kolibrios/lib/avutil-52.dll", "common/lib/avutil-52.dll"},
  {"kolibrios/lib/freetype.dll", "common/lib/freetype.dll"},
- {"kolibrios/lib/libc.dll", "common/lib/libc.dll"},
+ {"kolibrios/lib/libc.dll", "../contrib/sdk/bin/libc.dll", group = "../contrib/sdk/lib/<libc.dll.a>"},
  {"kolibrios/lib/pixlib.dll", "common/lib/pixlib.dll"},
  {"kolibrios/lib/swresample-0.dll", "common/lib/swresample-0.dll"},
  {"kolibrios/lib/swscale-2.dll", "common/lib/swscale-2.dll"},
@@ -477,13 +484,13 @@ function expand_extra_files(files)
     then
       local g = tup.glob(v[2])
       for j,x in ipairs(g) do
-        table.insert(result, {v[1], x})
+        table.insert(result, {v[1], x, group=v.group})
       end
     else
       if v.cp1251_from then
         tup.definerule{inputs = {v.cp1251_from}, command = 'iconv -f cp866 -t cp1251 "%f" > "%o"', outputs = {v[2]}}
       end
-      table.insert(result, {v[1], v[2]})
+      table.insert(result, {v[1], v[2], group=v.group})
     end
   end
   return result
@@ -517,7 +524,7 @@ for i,v in ipairs(img_files) do
 
   -- tup does not want to see hidden files as dependencies
   if not string.match(local_file, "/%.") then
-    table.insert(input_deps, local_file)
+    table.insert(input_deps, v.group or local_file)
   end
 end
 
@@ -570,7 +577,7 @@ input_deps = {"kolibri.img"}
 iso_files_list = ""
 for i,v in ipairs(iso_extra_files) do
   iso_files_list = iso_files_list .. ' "' .. v[1] .. '=' .. v[2] .. '"'
-  table.insert(input_deps, v[2])
+  table.insert(input_deps, v.group or v[2])
 end
 
 -- generate tup rule for kolibri.iso
@@ -589,8 +596,9 @@ tup.definerule{inputs = input_deps, command =
 cp = 'cp "%f" "%o"'
 tup.definerule{inputs = {"kolibri.img"}, command = cp, outputs = {"distribution_kit/kolibri.img"}}
 for i,v in ipairs(distr_extra_files) do
+  cmd = cp:gsub("%%f", v[2]) -- input can be a group, we can't rely on tup's expansion of %f in this case
   if string.sub(v[1], -1) == "/"
-  then tup.definerule{inputs = {v[2]}, command = cp, outputs = {"distribution_kit/" .. v[1] .. tup.file(v[2])}}
-  else tup.definerule{inputs = {v[2]}, command = cp, outputs = {"distribution_kit/" .. v[1]}}
+  then tup.definerule{inputs = {v.group or v[2]}, command = cmd, outputs = {"distribution_kit/" .. v[1] .. tup.file(v[2])}}
+  else tup.definerule{inputs = {v.group or v[2]}, command = cmd, outputs = {"distribution_kit/" .. v[1]}}
   end
 end
diff --git a/data/common/lib/libc.dll b/data/common/lib/libc.dll
deleted file mode 100644
index 2821f2046e..0000000000
Binary files a/data/common/lib/libc.dll and /dev/null differ
diff --git a/programs/develop/libraries/newlib_example/Tupfile.lua b/programs/develop/libraries/newlib_example/Tupfile.lua
new file mode 100644
index 0000000000..b319a3820b
--- /dev/null
+++ b/programs/develop/libraries/newlib_example/Tupfile.lua
@@ -0,0 +1,6 @@
+if tup.getconfig("NO_GCC") ~= "" or tup.getconfig("NO_FASM") ~= "" then return end
+HELPERDIR = (tup.getconfig("HELPERDIR") == "") and "../../.." or tup.getconfig("HELPERDIR")
+tup.include(HELPERDIR .. "/use_gcc.lua")
+tup.include(HELPERDIR .. "/use_newlib.lua")
+compile_gcc{"main.c"}
+link_gcc("binclock")
diff --git a/programs/develop/libraries/newlib_example/main.c b/programs/develop/libraries/newlib_example/main.c
new file mode 100644
index 0000000000..dfe14a74df
--- /dev/null
+++ b/programs/develop/libraries/newlib_example/main.c
@@ -0,0 +1,87 @@
+#include <kos32sys.h>
+
+#define B_SZ	10
+
+static char * Title="BinClock";
+
+static void draw_small_box(int x,int y,int is_on)
+{
+ draw_bar(x,y,B_SZ,B_SZ,is_on ? 0xFF0000 : 0x103000);
+}
+
+static void draw_box_group(int x,int y,int num)
+{
+ int i,j;
+ char buf[2];
+ buf[0]=(num&(1+2+4+8))+'0';
+ buf[1]='\0';
+ for(i=0;i<4;i++)
+ { 
+  j=(B_SZ+2)*i;
+  draw_small_box(x,y+((B_SZ+2)*i),num & (1<<(3-i)) ? 1 : 0);
+ }
+ draw_bar(x,y+((B_SZ+2)*4),B_SZ,B_SZ,0x800000);
+ draw_text_sys(buf,x+2,y+((B_SZ+2)*4)+3,1,0xFFFFFF);
+}
+
+static void draw_bcd_num(int x,int y,int num)
+{
+ int v1,v2;
+ v1=(num>>4)&(1+2+4+8);
+ v2=num & (1+2+4+8);
+ draw_box_group(x,y,v1);
+ draw_box_group(x+B_SZ+2,y,v2);
+}
+
+static void draw_hms(int x,int y)
+{
+ unsigned t;
+ int h,m,s;
+ __asm__ __volatile__("int $0x40" : "=a"(t) : "a"(3));
+ s=(t & 0x00FF0000)>>16;
+ m=(t & 0x0000FF00)>>8;
+ h=(t & 0x000000FF);
+ draw_bcd_num(x,y,h);
+ x+=((B_SZ+2)<<1)+2;
+ draw_bcd_num(x,y,m);
+ x+=((B_SZ+2)<<1)+2;
+ draw_bcd_num(x,y,s);
+}
+
+static void draw_h(void)
+{
+ draw_hms(22,28);
+}
+
+static void paint(void)
+{
+ BeginDraw();
+ DrawWindow(100,100,40+((B_SZ+2)*6)+4,30+((B_SZ+2)*4)+16,Title,0x80,0x13);
+ draw_bar(20,26,((B_SZ+2)*6)+4+2,4+((B_SZ+1)*4)+2,0);
+ draw_h();
+ EndDraw();
+}
+
+int main(void)
+{
+ int i;
+ paint();
+ for(;;)
+ {
+  i=wait_for_event(20);
+  draw_h();
+  switch(i)
+  {
+   case 1:
+    paint();
+    continue;
+   case 2:
+    get_key();
+    continue;
+   case 3:
+    if(get_os_button()==1) return 0;
+    continue;
+  }
+ }
+}
+  
\ No newline at end of file
diff --git a/programs/use_gcc.lua b/programs/use_gcc.lua
index b8716109fa..e43c4b7c74 100644
--- a/programs/use_gcc.lua
+++ b/programs/use_gcc.lua
@@ -1,4 +1,12 @@
-CFLAGS = "-Os -fno-ident -fomit-frame-pointer -fno-stack-check -fno-stack-protector -mno-stack-arg-probe -mpreferred-stack-boundary=2 -fno-exceptions -fno-asynchronous-unwind-tables -ffast-math -mno-ms-bitfields -march=pentium-mmx"
+CFLAGS_GENERIC = "-fno-ident -fomit-frame-pointer -fno-stack-check -fno-stack-protector -mno-stack-arg-probe -fno-exceptions -fno-asynchronous-unwind-tables -ffast-math -mno-ms-bitfields -march=pentium-mmx"
+CFLAGS_OPTIMIZE_SIZE = "-Os -mpreferred-stack-boundary=2 " .. CFLAGS_GENERIC
+CFLAGS_OPTIMIZE_SPEED = "-O2 -mpush-args -mno-accumulate-outgoing-args " .. CFLAGS_GENERIC
+-- The following could in specific cases be marginally faster CFLAGS_OPTIMIZE_SPEED,
+-- and in all cases gives a notable overhead in size.
+CFLAGS_OPTIMIZE_SPEED_INSANE = "-O2 " .. CFLAGS_GENERIC
+-- Default is optimizing by size. Override on per-project or per-file basis.
+CFLAGS = CFLAGS_OPTIMIZE_SIZE
+
 CFLAGS_c = "" -- extra flags for *.c
 CFLAGS_cpp = " -fno-rtti" -- extra flags for *.cpp
 LDFLAGS = "-nostdlib -n --file-alignment=16 --section-alignment=16"
diff --git a/programs/use_newlib.lua b/programs/use_newlib.lua
new file mode 100644
index 0000000000..2728a4193f
--- /dev/null
+++ b/programs/use_newlib.lua
@@ -0,0 +1,16 @@
+NEWLIB_BASE = tup.getcwd() .. "/../contrib/sdk/sources/newlib"
+NEWLIB_LIB = tup.getcwd() .. "/../contrib/sdk/lib"
+
+TOOLCHAIN_LIBPATH = tup.getconfig("TOOLCHAIN_LIBPATH")
+-- if not given explicitly in config, try to guess
+if TOOLCHAIN_LIBPATH == "" then
+  if tup.getconfig("TUP_PLATFORM") == "win32"
+  then TOOLCHAIN_LIBPATH="C:\\MinGW\\msys\\1.0\\home\\autobuild\\tools\\win32\\mingw32\\lib"
+  else TOOLCHAIN_LIBPATH="/home/autobuild/tools/win32/mingw32/lib"
+  end
+end
+
+INCLUDES = INCLUDES .. " -I" .. NEWLIB_BASE .. "/libc/include"
+LDFLAGS = LDFLAGS .. " -T$(NEWLIB_BASE)/app.lds -L$(NEWLIB_LIB) -L$(TOOLCHAIN_LIBPATH) --image-base 0"
+tup.append_table(LIBDEPS, {NEWLIB_LIB .. "/<libapp.a>", NEWLIB_LIB .. "/<libc.dll.a>"})
+LIBS = LIBS .. "-lgcc -lapp -lc.dll"
diff --git a/tup.config.template b/tup.config.template
index 0b62c467b5..222123d588 100644
--- a/tup.config.template
+++ b/tup.config.template
@@ -19,6 +19,13 @@
 # CONFIG_NO_GCC=full
 # CONFIG_NO_MSVC=full
 # CONFIG_NO_CMM=full
+### Path to gcc toolchain library with -lgcc.
+### Normally, you should not modify it,
+### since the toolchain assumes the fixed path anyway.
+### default Windows variant
+# CONFIG_TOOLCHAIN_LIBPATH=C:\MinGW\msys\1.0\home\autobuild\tools\win32\mingw32\lib
+### default Linux variant
+# CONFIG_TOOLCHAIN_LIBPATH=/home/autobuild/tools/win32/mingw32/lib
 
 ### Optional postprocessing of binaries, where applicable.
 ### By default, no postprocessing is used.