diff --git a/libc/Jamfile b/libc/Jamfile
new file mode 100644
index 0000000..a65be5d
--- /dev/null
+++ b/libc/Jamfile
@@ -0,0 +1,441 @@
+# This file is used to build the Bionic library with the Jam build
+# tool. For info, see www.perforce.com/jam/jam.html
+#
+
+BIONIC_TOP ?= $(DOT) ;
+
+DEBUG = 1 ;
+
+# pattern used for automatic heade inclusion detection
+HDRPATTERN = "^[ 	]*#[ 	]*include[ 	]*[<\"]([^\">]*)[\">].*$" ;
+
+
+# debugging support, simply define the DEBUG variable to activate verbose output
+rule Debug
+{
+    if $(DEBUG) {
+        Echo $(1) ;
+    }
+}
+
+# return all elements from $(1) that are not in $(2)
+rule Filter  list : filter
+{
+    local result = ;
+    local item ;
+    for item in $(list) {
+        if ! $(item) in $(filter) {
+            result += $(item) ;
+        }
+    }
+    return $(result) ;
+}
+
+
+# reverse a list of elements
+rule Reverse  list
+{
+    local  result = ;
+    local  item ;
+
+    for item in $(list) {
+        result = $(item) $(result) ;
+    }
+    return $(result) ;
+}
+
+
+# decompose a path into a list of elements
+rule PathDecompose  dir
+{
+    local  result ;
+
+    while $(dir:D)
+    {
+        if ! $(dir:BS) {  # for rooted paths like "/foo"
+            break ;
+        }
+        result = $(dir:BS) $(result) ;
+        dir    = $(dir:D) ;
+    }
+    result = $(dir) $(result) ;
+    return $(result) ;
+}
+
+
+# simply a file path, i.e. get rid of . or .. when possible
+rule _PathSimplify  dir
+{
+    local  result = ;
+    local  dir2 d ;
+
+    dir  = [ PathDecompose $(dir) ] ;
+
+    # get rid of any single dot
+    dir2 = ;
+    for d in $(dir) {
+        if $(d) = "." {
+            continue ;
+        }
+        dir2 += $(d) ;
+    }
+
+    # get rid of .. when possible
+    for d in $(dir2) {
+        if $(d) = ".." && $(result) {
+            result = $(result[2-]) ;
+        }
+        else
+            result = $(d) $(result) ;
+    }
+
+    # now invert the result
+    result = [ Reverse $(result) ] ;
+    if ! $(result) {
+        result = "." ;
+    }
+    return $(result:J="/") ;
+}
+
+
+rule PathSimplify  dirs
+{
+    local result ;
+    local d ;
+    for d in $(dirs) {
+        result += [ _PathSimplify $(d) ] ;
+    }
+    return $(result) ;
+}
+
+
+# retrieve list of subdirectories
+rule ListSubDirs  paths
+{
+    local  result  = ;
+    local  entry ;
+    for entry in [ Glob $(paths) : * ] {
+        if ! $(entry:S) {
+            result += $(entry) ;
+        }
+    }
+    return [ PathSimplify $(result) ] ;
+}
+
+
+# retrieve list of sources in a given directory
+rule ListSources  path
+{
+    return [ Glob $(path) : *.S *.c ] ;
+}
+
+
+# find the prebuilt directory
+#
+if ! $(TOP) {
+    Echo "Please define TOP as the root of your device build tree" ;
+    Exit ;
+}
+
+Debug "OS is" $(OS) ;
+Debug "CPU is" $(CPU) ;
+
+if $(OS) = LINUX
+{
+    PREBUILT = $(TOP)/prebuilt/Linux ;
+}
+else if $(OS) = MACOSX
+{
+    switch $(CPU) {
+        case i386 : PREBUILT = $(TOP)/prebuilt/darwin-x86 ; break ;
+        case ppc  : PREBUILT = $(TOP)/prebuilt/darwin-ppc ; break ;
+        case *    : Echo "unsupported CPU" "$(CPU) !!" ;
+                    Echo "Please contact digit@google.com for help" ;
+                    Exit ;
+    }
+}
+else
+{
+    Echo "Unsupported operating system" $(OS) ;
+    Echo "Please contact digit@google.com for help" ;
+    Exit ;
+}
+
+Debug "TOP is" $(TOP) ;
+Debug "PREBUILT is" $(PREBUILT) ;
+
+
+# check architectures and setup toolchain variables
+#
+SUPPORTED_ARCHS = x86 arm ;
+
+ARCH ?= $(SUPPORTED_ARCHS) ;
+
+if ! $(ARCH) in $(SUPPORTED_ARCHS) {
+    Echo "The variable ARCH contains an unsupported value, use one or more of these instead" ;
+    Echo "separated by spaces:" $(SUPPORTED_ARCHS) ;
+    Exit ;
+}
+
+x86_TOOLSET_PREFIX ?= "" ;
+arm_TOOLSET_PREFIX ?= $(TOP)/prebuilt/Linux/toolchain-4.1.1/bin/arm-elf- ;
+
+for arch in $(ARCH) {
+    CC_$(arch)  = $($(arch)_TOOLSET_PREFIX)gcc ;
+    C++_$(arch) = $($(arch)_TOOLSET_PREFIX)g++ ;
+    AR_$(arch)  = $($(arch)_TOOLSET_PREFIX)ar ;
+}
+
+
+# the list of arch-independent source subdirectories
+BIONIC_SRC_SUBDIRS = string ;
+BIONIC_x86_SUBDIRS = ;
+BIONIC_arm_SUBDIRS = ;
+
+CFLAGS   = -O0 -g -W ;
+
+
+
+# find sources in a given list of subdirectories
+rule FindSources  dirs
+{
+    local dir ;
+
+    for dir in $(dirs)
+    {
+        local LOCAL_SRC NO_LOCAL_SRC ;
+
+        if [ Glob $(dir) : rules.jam ] {
+            include $(dir)/rules.jam ;
+            if $(LOCAL_SRC) {
+                _sources = $(LOCAL_SRC) ;
+            }
+            else {
+                _sources = [ Glob $(dir) : *.S *.c ] ;
+                _sources = $(_sources:BS) ;
+            }
+            if $(NO_LOCAL_SRC) {
+                _sources = [ Filter $(_sources) : $(NO_LOCAL_SRC) ] ;
+            }
+            sources += $(dir)/$(_sources) ;
+        }
+        else
+            sources += [ ListSources $(dir) ] ;
+    }
+}
+
+# Compile a given object file from a source
+rule Compile  object : source
+{
+    Depends $(object) : $(source) ;
+    Depends bionic : $(object) ;
+    Clean clean : $(object) ;
+
+    MakeLocate $(object) : $(OUT) ;
+
+
+    CC on $(object)       = $(CC_$(arch)) ;
+    CFLAGS on $(object)   = $(CFLAGS) ;
+    INCLUDES on $(object) = $(INCLUDES) ;
+    DEFINES on $(object)  = $(DEFINES) ;
+
+    HDRRULE on $(>) = HdrRule ;
+    HDRSCAN on $(>) = $(HDRPATTERN) ;
+    HDRSEARCH on $(>) = $(INCLUDES) ;
+    HDRGRIST on $(>) = $(HDRGRIST) ;
+}
+
+
+actions Compile
+{
+    $(CC) -c -o $(1) $(CFLAGS) -I$(INCLUDES) -D$(DEFINES) $(2)
+}
+
+
+rule RmTemps
+{
+    Temporary $(2) ;
+}
+
+actions quietly updated piecemeal together RmTemps
+{
+    rm -f $(2)
+}
+
+actions Archive
+{
+    $(AR) ru $(1) $(2)
+}
+
+rule Library  library : objects
+{
+    local  obj ;
+
+    if ! $(library:S) {
+        library = $(library:S=.a) ;
+    }
+    library = $(library:G=<$(arch)>) ;
+
+    Depends all : $(library) ;
+
+    if ! $(library:D) {
+        MakeLocate $(library) $(library)($(objects:BS)) : $(OUT) ;
+    }
+
+    Depends $(library) : $(library)($(objects:BS)) ;
+    for obj in $(objects) {
+        Depends $(library)($(obj:BS)) : $(obj) ;
+    }
+
+    Clean clean : $(library) ;
+
+    AR on $(library) = $(AR_$(arch)) ;
+    Archive $(library) : $(objects) ;
+
+    RmTemps $(library) : $(objects) ;
+}
+
+
+rule  ProcessDir
+{
+    local CFLAGS   = $(CFLAGS) ;
+    local DEFINES  = $(DEFINES) ;
+    local INCLUDES = $(INCLUDES) ;
+    local local_rules = [ Glob $(1) : rules.jam ] ;
+    local source sources ;
+
+    if $(local_rules) {
+        local LOCAL_CFLAGS LOCAL_DEFINES LOCAL_INCLUDES LOCAL_SRC NO_LOCAL_SRC ;
+
+        include $(local_rules) ;
+        CFLAGS   += $(LOCAL_CFLAGS) ;
+        DEFINES  += $(LOCAL_DEFINES) ;
+        INCLUDES += $(LOCAL_INCLUDES) ;
+
+        if $(LOCAL_SRC) {
+            sources = $(LOCAL_SRC) ;
+        }
+        else {
+            sources = [ Glob $(1) : *.S *.c ] ;
+            sources = $(sources:BS) ;
+        }
+
+        if $(NO_LOCAL_SRC) {
+            sources = [ Filter $(sources) : $(NO_LOCAL_SRC) ] ;
+        }
+
+        sources = $(1)/$(sources) ;
+    }
+    else
+        sources = [ Glob $(1) : *.S *.c ] ;
+
+    for source in $(sources) {
+        local name = $(source:B) ;
+
+        if $(source:S) = ".S" {
+            # record the list of assembler sources
+            ASSEMBLER_SOURCES += $(name) ;
+        }
+        else if $(source:S) = ".c" && $(name) in $(ASSEMBLER_SOURCES) {
+            # skip C source file if corresponding assembler exists
+            continue ;
+        }
+
+        objname = <$(arch)>$(name).o  ;
+
+        Compile $(objname) : $(source) ;
+        ALL_OBJECTS += $(objname) ;
+    }
+}
+
+rule ProcessDirs
+{
+    local  dir ;
+    for dir in $(1) {
+        ProcessDir $(dir) ;
+    }
+}
+
+INCLUDES_x86 = /usr/src/linux/include ;
+
+INCLUDES_arm = ../kernel_headers
+               include/arch/arm
+               include/bits32
+               ;
+
+INCLUDES = include stdio string stdlib .
+           ../msun/include
+           ;
+
+DEFINES  = ANDROID_CHANGES
+           USE_LOCKS
+           REALLOC_ZERO_BYTES_FREES
+           _LIBC=1
+           SOFTFLOAT
+           FLOATING_POINT
+           NEED_PSELECT=1
+           ANDROID
+           ;
+
+CFLAGS_x86 = ;
+
+
+for arch in $(ARCH)
+{
+    local ARCH_DIR = $(BIONIC_TOP)/arch-$(arch) ;
+    local INCLUDES = $(INCLUDES_$(arch)) $(ARCH_DIR)/include $(INCLUDES) ;
+    local DEFINES  = $(DEFINES_$(arch)) $(DEFINES) ARCH=$(arch)  ;
+    local CFLAGS   = $(CFLAGS) $(CFLAGS_$(arch)) ;
+    local OUT      = out/$(arch) ;
+    local ASSEMBLER_SOURCES ALL_OBJECTS ;
+
+    ProcessDirs [ ListSubDirs $(ARCH_DIR) ] ;
+    ProcessDirs stdlib stdio unistd string tzcode inet ;
+    ProcessDirs [ ListSubDirs netbsd ] ;
+    ProcessDirs bionic ;
+
+    Library bionic : $(ALL_OBJECTS) ;
+}
+
+BIONIC_SEARCH = $(BIONIC_TOP)/include ;
+
+
+
+# /HdrRule source : headers ;
+#
+# Arranges the proper dependencies when the file _source_ includes the files
+# _headers_ through the #include C preprocessor directive
+#
+# this rule is not intendend to be called explicitely. It is called
+# automatically during header scanning on sources handled by the @Object
+# rule (e.g. sources in @Main or @Library rules)
+#
+rule HdrRule
+{
+    # HdrRule source : headers ;
+
+    # N.B.  This rule is called during binding, potentially after
+    # the fate of many targets has been determined, and must be
+    # used with caution: don't add dependencies to unrelated
+    # targets, and don't set variables on $(<).
+
+    # Tell Jam that anything depending on $(<) also depends on $(>),
+    # set SEARCH so Jam can find the headers, but then say we don't
+    # care if we can't actually find the headers (they may have been
+    # within ifdefs),
+
+    local s = $(>:G=$(HDRGRIST:E)) ;
+
+    Includes $(<) : $(s) ;
+    SEARCH on $(s) = $(HDRSEARCH) ;
+    NoCare $(s) ;
+
+    # Propagate on $(<) to $(>)
+
+    HDRSEARCH on $(s) = $(HDRSEARCH) ;
+    HDRSCAN on $(s) = $(HDRSCAN) ;
+    HDRRULE on $(s) = $(HDRRULE) ;
+    HDRGRIST on $(s) = $(HDRGRIST) ;
+}
+
+