Update autosetup to v0.6.5

Includes a fix for -gstabs on newer macs

Signed-off-by: Steve Bennett <steveb@workware.net.au>

11 files changed, 839 insertions, 384 deletions

diff --git a/autosetup/README.autosetup b/autosetup/README.autosetup
index 7ba1e37..c50bd84 100644
--- a/autosetup/README.autosetup
+++ b/autosetup/README.autosetup
@@ -1 +1 @@
-This is autosetup v0.6.4. See http://msteveb.github.com/autosetup/
+This is autosetup v0.6.5. See http://msteveb.github.com/autosetup/
diff --git a/autosetup/autosetup b/autosetup/autosetup
index 84de0cf..85c61ca 100755
--- a/autosetup/autosetup
+++ b/autosetup/autosetup
@@ -5,7 +5,7 @@
 # \
 dir=`dirname "$0"`; exec "`$dir/find-tclsh`" "$0" "$@"
 
-set autosetup(version) 0.6.4
+set autosetup(version) 0.6.5
 
 # Can be set to 1 to debug early-init problems
 set autosetup(debug) 0
@@ -87,7 +87,7 @@ proc main {argv} {
 		reference:=text => "display the autosetup command reference. 'text', 'wiki', 'asciidoc' or 'markdown'"
 		debug        => "display debugging output as autosetup runs"
 		install:=.   => "install autosetup to the current or given directory (in the 'autosetup/' subdirectory)"
-		force init   => "create an initial 'configure' script if none exists"
+		force init:=help   => "create initial auto.def, etc.  Use --init=help for known types"
 		# Undocumented options
 		option-checking=1
 		nopager
@@ -119,6 +119,11 @@ proc main {argv} {
 		use local
 	}
 
+	# Now any auto-load modules
+	foreach file [glob -nocomplain $autosetup(libdir)/*.auto $autosetup(libdir)/*/*.auto] {
+		automf_load source $file
+	}
+
 	if {[opt-val help] ne ""} {
 		incr autosetup(showhelp)
 		use help
@@ -130,9 +135,9 @@ proc main {argv} {
 		autosetup_reference [opt-val {manual ref reference}]
 	}
 
-	if {[opt-bool init]} {
+	if {[opt-val init] ne ""} {
 		use init
-		autosetup_init
+		autosetup_init [opt-val init]
 	}
 
 	if {[opt-val install] ne ""} {
@@ -143,7 +148,7 @@ proc main {argv} {
 	if {![file exists $autosetup(autodef)]} {
 		# Check for invalid option first
 		options {}
-		user-error "No auto.def found in $autosetup(srcdir)"
+		user-error "No auto.def found in \"$autosetup(srcdir)\" (use [file tail $::autosetup(exe)] --init to create one)"
 	}
 
 	# Parse extra arguments into autosetup(cmdline)
@@ -167,6 +172,7 @@ proc main {argv} {
 	# Log how we were invoked
 	configlog "Invoked as: [getenv WRAPPER $::argv0] [quote-argv $autosetup(argv)]"
 
+	# Note that auto.def is *not* loaded in the global scope
 	source $autosetup(autodef)
 
 	# Could warn here if options {} was not specified
@@ -174,7 +180,11 @@ proc main {argv} {
 	show-notices
 
 	if {$autosetup(debug)} {
-		parray define
+		msg-result "Writing all defines to config.log"
+		configlog "================ defines ======================"
+		foreach n [lsort [array names define]] {
+			configlog "define $n $define($n)"
+		}
 	}
 
 	exit 0
@@ -421,6 +431,10 @@ proc options {optlist} {
 proc config_guess {} {
 	if {[file-isexec $::autosetup(dir)/config.guess]} {
 		exec-with-stderr sh $::autosetup(dir)/config.guess
+		if {[catch {exec-with-stderr sh $::autosetup(dir)/config.guess} alias]} {
+			user-error $alias
+		}
+		return $alias
 	} else {
 		configlog "No config.guess, so using uname"
 		string tolower [exec uname -p]-unknown-[exec uname -s][exec uname -r]
@@ -429,10 +443,11 @@ proc config_guess {} {
 
 proc config_sub {alias} {
 	if {[file-isexec $::autosetup(dir)/config.sub]} {
-		exec-with-stderr sh $::autosetup(dir)/config.sub $alias
-	} else {
-		return $alias
+		if {[catch {exec-with-stderr sh $::autosetup(dir)/config.sub $alias} alias]} {
+			user-error $alias
+		}
 	}
+	return $alias
 }
 
 # @define name ?value=1?
@@ -754,8 +769,13 @@ proc user-notice {msg} {
 
 # Incorrect usage in the auto.def file. Identify the location.
 proc autosetup-error {msg} {
+	autosetup-full-error [error-location $msg]
+}
+
+# Like autosetup-error, except $msg is the full error message.
+proc autosetup-full-error {msg} {
 	show-notices
-	puts stderr [error-location $msg]
+	puts stderr $msg
 	exit 1
 }
 
@@ -865,7 +885,14 @@ proc autosetup_add_dep {filename} {
 # @use module ...
 #
 # Load the given library modules.
-# e.g. use cc cc-shared
+# e.g. 'use cc cc-shared'
+#
+# Note that module 'X' is implemented in either 'autosetup/X.tcl'
+# or 'autosetup/X/init.tcl'
+#
+# The latter form is useful for a complex module which requires additional
+# support file. In this form, '$::usedir' is set to the module directory
+# when it is loaded.
 #
 proc use {args} {
 	foreach m $args {
@@ -874,20 +901,36 @@ proc use {args} {
 		}
 		set ::libmodule($m) 1
 		if {[info exists ::modsource($m)]} {
-			uplevel #0 eval $::modsource($m)
+			automf_load eval $::modsource($m)
 		} else {
-			set source $::autosetup(libdir)/${m}.tcl
-			if {[file exists $source]} {
-				uplevel #0 [list source $source]
+			set sources [list $::autosetup(libdir)/${m}.tcl $::autosetup(libdir)/${m}/init.tcl]
+			set found 0
+			foreach source $sources {
+				if {[file exists $source]} {
+					incr found
+					break
+				}
+			}
+			if {$found} {
+				# For the convenience of the "use" source, point to the directory
+				# it is being loaded from
+				set ::usedir [file dirname $source]
+				automf_load source $source
 				autosetup_add_dep $source
 			} else {
-				puts "Looking for $source"
 				autosetup-error "use: No such module: $m"
 			}
 		}
 	}
 }
 
+# Load module source in the global scope by executing the given command
+proc automf_load {args} {
+	if {[catch [list uplevel #0 $args] msg opts] ni {0 2 3}} {
+		autosetup-full-error [error-dump $msg $opts]
+	}
+}
+
 # Initial settings
 set autosetup(exe) $::argv0
 set autosetup(istcl) 1
@@ -1146,9 +1189,9 @@ proc autosetup_help {what} {
 # If not already paged and stdout is a tty, pipe the output through the pager
 # This is done by reinvoking autosetup with --nopager added
 proc use_pager {} {
-    if {![opt-bool nopager] && [getenv PAGER ""] ne "" && ![string match "not a tty" [exec tty]]} {
+    if {![opt-bool nopager] && [getenv PAGER ""] ne "" && [isatty? stdin] && [isatty? stdout]} {
         catch {
-            exec [info nameofexecutable] $::argv0 --nopager {*}$::argv | [getenv PAGER] >@stdout <@stdin 2>/dev/null
+            exec [info nameofexecutable] $::argv0 --nopager {*}$::argv |& [getenv PAGER] >@stdout <@stdin
         }
         exit 0
     }
@@ -1278,55 +1321,56 @@ set modsource(init) {
 
 # Module to help create auto.def and configure
 
-proc autosetup_init {} {
-	set create_configure 1
-	if {[file exists configure]} {
-		if {!$::autosetup(force)} {
-			# Could this be an autosetup configure?
-			if {![string match "*\nWRAPPER=*" [readfile configure]]} {
-				puts "I see configure, but not created by autosetup, so I won't overwrite it."
-				puts "Use autosetup --init --force to overwrite."
-				set create_configure 0
-			}
-		} else {
-			puts "I will overwrite the existing configure because you used --force."
+proc autosetup_init {type} {
+	set help 0
+	if {$type in {? help}} {
+		incr help
+	} elseif {![dict exists $::autosetup(inittypes) $type]} {
+		puts "Unknown type, --init=$type"
+		incr help
+	}
+	if {$help} {
+		puts "Use one of the following types (e.g. --init=make)\n"
+		foreach type [lsort [dict keys $::autosetup(inittypes)]] {
+			lassign [dict get $::autosetup(inittypes) $type] desc
+			# XXX: Use the options-show code to wrap the description
+			puts [format "%-10s %s" $type $desc]
 		}
-	} else {
-		puts "I don't see configure, so I will create it."
+		exit 0
 	}
-	if {$create_configure} {
-		if {!$::autosetup(installed)} {
-			user-notice "Warning: Initialising from the development version of autosetup"
+	lassign [dict get $::autosetup(inittypes) $type] desc script
 
-			writefile configure "#!/bin/sh\nWRAPPER=\"\$0\" exec $::autosetup(dir)/autosetup \"\$@\"\n"
-		} else {
-			writefile configure \
-{#!/bin/sh
-dir="`dirname "$0"`/autosetup"
-WRAPPER="$0" exec "`$dir/find-tclsh`" "$dir/autosetup" "$@"
-}
-		}
-		catch {exec chmod 755 configure}
-	}
-	if {![file exists auto.def]} {
-		puts "I don't see auto.def, so I will create a default one."
-		writefile auto.def {# Initial auto.def created by 'autosetup --init'
+	puts "Initialising $type: $desc\n"
+
+	# All initialisations happens in the top level srcdir
+	cd $::autosetup(srcdir)
 
-use cc
+	uplevel #0 $script
 
-# Add any user options here
-options {
+	exit 0
 }
 
-make-config-header config.h
-make-template Makefile.in
+proc autosetup_add_init_type {type desc script} {
+	dict set ::autosetup(inittypes) $type [list $desc $script]
 }
-	}
-	if {![file exists Makefile.in]} {
-		puts "Note: I don't see Makefile.in. You will probably need to create one."
-	}
 
-	exit 0
+# This is for in creating build-system init scripts
+#
+# If the file doesn't exist, create it containing $contents
+# If the file does exist, only overwrite if --force is specified.
+#
+proc autosetup_check_create {filename contents} {
+	if {[file exists $filename]} {
+		if {!$::autosetup(force)} {
+			puts "I see $filename already exists."
+			return
+		} else {
+			puts "I will overwrite the existing $filename because you used --force."
+		}
+	} else {
+		puts "I don't see $filename, so I will create it."
+	}
+	writefile $filename $contents
 }
 }
 
@@ -1345,7 +1389,7 @@ proc autosetup_install {dir} {
 
 		set f [open autosetup/autosetup w]
 
-		set publicmodules {}
+		set publicmodules $::autosetup(libdir)/default.auto
 
 		# First the main script, but only up until "CUT HERE"
 		set in [open $::autosetup(dir)/autosetup]
@@ -1393,11 +1437,36 @@ proc autosetup_install {dir} {
 		user-error "Failed to install autosetup: $error"
 	}
 	puts "Installed [autosetup_version] to autosetup/"
-	catch {exec [info nameofexecutable] autosetup/autosetup --init >@stdout 2>@stderr}
+
+	# Now create 'configure' if necessary
+	autosetup_create_configure
 
 	exit 0
 }
 
+proc autosetup_create_configure {} {
+	if {[file exists configure]} {
+		if {!$::autosetup(force)} {
+			# Could this be an autosetup configure?
+			if {![string match "*\nWRAPPER=*" [readfile configure]]} {
+				puts "I see configure, but not created by autosetup, so I won't overwrite it."
+				puts "Remove it or use --force to overwrite."
+				return
+			}
+		} else {
+			puts "I will overwrite the existing configure because you used --force."
+		}
+	} else {
+		puts "I don't see configure, so I will create it."
+	}
+	writefile configure \
+{#!/bin/sh
+dir="`dirname "$0"`/autosetup"
+WRAPPER="$0"; export WRAPPER; exec "`$dir/find-tclsh`" "$dir/autosetup" "$@"
+}
+	catch {exec chmod 755 configure}
+}
+
 # Append the contents of $file to filehandle $f
 proc autosetup_install_append {f file} {
 	set in [open $file]
@@ -1541,15 +1610,28 @@ if {$autosetup(istcl)} {
 		}
 		return -code error "environment variable \"$name\" does not exist"
 	}
-} elseif {$autosetup(iswin)} {
-	# On Windows, backslash convert all environment variables
-	# (Assume that Tcl does this for us)
-	proc getenv {name args} {
-		string map {\\ /} [env $name {*}$args]
+	proc isatty? {channel} {
+		dict exists [fconfigure $channel] -xchar
 	}
 } else {
-	# Jim on unix is simple
-	alias getenv env
+	if {$autosetup(iswin)} {
+		# On Windows, backslash convert all environment variables
+		# (Assume that Tcl does this for us)
+		proc getenv {name args} {
+			string map {\\ /} [env $name {*}$args]
+		}
+	} else {
+		# Jim on unix is simple
+		alias getenv env
+	}
+	proc isatty? {channel} {
+		set tty 0
+		catch {
+			# isatty is a recent addition to Jim Tcl
+			set tty [$channel isatty]
+		}
+		return $tty
+	}
 }
 
 # In case 'file normalize' doesn't exist
@@ -1598,46 +1680,42 @@ proc error-location {msg} {
 	return $msg
 }
 
-# Similar to error-location, but called when user code generates an error
-# In this case we want to show the stack trace in user code, but not in autosetup code
-# (unless --debug is enabled)
+# If everything is working properly, the only errors which occur
+# should be generated in user code (e.g. auto.def).
+# By default, we only want to show the error location in user code.
+# We use [info frame] to achieve this, but it works differently on Tcl and Jim.
+#
+# This is designed to be called for incorrect usage in auto.def, via autosetup-error
 #
 proc error-stacktrace {msg} {
-	if {$::autosetup(istcl)} {
-		if {[regexp {file "([^ ]*)" line ([0-9]*)} $::errorInfo dummy file line]} {
-			return "[relative-path $file]:$line $msg\n$::errorInfo"
-		}
-		return $::errorInfo
-	} else {
-		# Prepend a live stacktrace to the error stacktrace, omitting the current level
-		set stacktrace [concat [info stacktrace] [lrange [stacktrace] 3 end]]
-
-		if {!$::autosetup(debug)} {
-			# Omit any levels from autosetup or with no file
-			set newstacktrace {}
-			foreach {p f l} $stacktrace {
-				if {[string match "*autosetup" $f] || $f eq ""} {
-					#puts "Skipping $p $f:$l"
-					continue
-				}
-				lappend newstacktrace $p $f $l
-			}
-			set stacktrace $newstacktrace
-		}
-
-		# Convert filenames to relative paths
-		set newstacktrace {}
-		foreach {p f l} $stacktrace {
-			lappend newstacktrace $p [relative-path $f] $l
-		}
-		lassign $newstacktrace p f l
-		if {$f ne ""} {
-			set prefix "$f:$l: "
+	if {$::autosetup(debug)} {
+		return -code error $msg
+	}
+	# Search back through the stack trace for the first error in a .def file
+	for {set i 1} {$i < [info level]} {incr i} {
+		if {$::autosetup(istcl)} {
+			array set info [info frame -$i]
 		} else {
-			set prefix ""
+			lassign [info frame -$i] info(caller) info(file) info(line)
+		}
+		if {[string match *.def $info(file)]} {
+			return "[relative-path $info(file)]:$info(line): Error: $msg"
 		}
+		#puts "Skipping $info(file):$info(line)"
+	}
+	return $msg
+}
 
-		return "${prefix}Error: $msg\n[stackdump $newstacktrace]"
+# Given the return from [catch {...} msg opts], returns an appropriate
+# error message. A nice one for Jim and a less-nice one for Tcl.
+#
+# This is designed for developer errors, e.g. in module code
+#
+proc error-dump {msg opts} {
+	if {$::autosetup(istcl)} {
+		return "Error: [dict get $opts -errorinfo]"
+	} else {
+		return "Error: $msg\n[stackdump $opts(-errorinfo)]"
 	}
 }
 }
diff --git a/autosetup/cc-lib.tcl b/autosetup/cc-lib.tcl
index e8e5e86..4df5130 100644
--- a/autosetup/cc-lib.tcl
+++ b/autosetup/cc-lib.tcl
@@ -75,3 +75,87 @@ proc cc-check-endian {} {
 	}
 	return $rc
 }
+
+# @cc-check-flags flag ?...?
+#
+# Checks whether the given C/C++ compiler flags can be used. Defines feature
+# names prefixed with 'HAVE_CFLAG' and 'HAVE_CXXFLAG' respectively, and
+# appends working flags to '-cflags' and 'CFLAGS' or 'CXXFLAGS'.
+proc cc-check-flags {args} {
+    set result 1
+    array set opts [cc-get-settings]
+    switch -exact -- $opts(-lang) {
+        c++ {
+            set lang C++
+            set prefix CXXFLAG
+        }
+        c {
+            set lang C
+            set prefix CFLAG
+        }
+        default {
+            autosetup-error "cc-check-flags failed with unknown language: $opts(-lang)"
+        }
+    }
+    foreach flag $args {
+        msg-checking "Checking whether the $lang compiler accepts $flag..."
+        if {[cctest -cflags $flag]} {
+            msg-result yes
+            define-feature $prefix$flag
+            cc-with [list -cflags [list $flag]]
+            define-append ${prefix}S $flag
+        } else {
+            msg-result no
+            set result 0
+        }
+    }
+    return $result
+}
+
+# @cc-check-standards ver ?...?
+#
+# Checks whether the C/C++ compiler accepts one of the specified '-std=$ver'
+# options, and appends the first working one to '-cflags' and 'CFLAGS' or
+# 'CXXFLAGS'.
+proc cc-check-standards {args} {
+    array set opts [cc-get-settings]
+    foreach std $args {
+        if {[cc-check-flags -std=$std]} {
+            return $std
+        }
+    }
+    return ""
+}
+
+# Checks whether $keyword is usable as alignof
+proc cctest_alignof {keyword} {
+    msg-checking "Checking for $keyword..."
+    if {[cctest -code [subst -nobackslashes {
+        printf("minimum alignment is %d == %d\n", ${keyword}(char), ${keyword}('x'));
+    }]]} then {
+        msg-result ok
+        define-feature $keyword
+    } else {
+        msg-result "not found"
+    }
+}
+
+# @cc-check-c11
+#
+# Checks for several C11/C++11 extensions and their alternatives. Currently
+# checks for '_Static_assert', '_Alignof', '__alignof__', '__alignof'.
+proc cc-check-c11 {} {
+    msg-checking "Checking for _Static_assert..."
+    if {[cctest -code {
+        _Static_assert(1, "static assertions are available");
+    }]} then {
+        msg-result ok
+        define-feature _Static_assert
+    } else {
+        msg-result "not found"
+    }
+
+    cctest_alignof _Alignof
+    cctest_alignof __alignof__
+    cctest_alignof __alignof
+}
diff --git a/autosetup/cc-shared.tcl b/autosetup/cc-shared.tcl
index 1ff9071..b9ae29d 100644
--- a/autosetup/cc-shared.tcl
+++ b/autosetup/cc-shared.tcl
@@ -7,70 +7,95 @@
 # It defines the following variables:
 #
 ## SH_CFLAGS         Flags to use compiling sources destined for a shared library
-## SH_LDFLAGS        Flags to use linking a shared library
+## SH_LDFLAGS        Flags to use linking (creating) a shared library
+## SH_SOPREFIX       Prefix to use to set the soname when creating a shared library
+## SH_SOEXT          Extension for shared libs
+## SH_SOEXTVER       Format for versioned shared libs - %s = version
 ## SHOBJ_CFLAGS      Flags to use compiling sources destined for a shared object
 ## SHOBJ_LDFLAGS     Flags to use linking a shared object, undefined symbols allowed
 ## SHOBJ_LDFLAGS_R   - as above, but all symbols must be resolved
 ## SH_LINKFLAGS      Flags to use linking an executable which will load shared objects
 ## LD_LIBRARY_PATH   Environment variable which specifies path to shared libraries
+## STRIPLIBFLAGS     Arguments to strip to strip a dynamic library
 
 module-options {}
 
-foreach i {SH_LINKFLAGS SH_CFLAGS SH_LDFLAGS SHOBJ_CFLAGS SHOBJ_LDFLAGS} {
-	define $i ""
-}
-
+# Defaults: gcc on unix
+define SHOBJ_CFLAGS -fpic
+define SHOBJ_LDFLAGS -shared
+define SH_CFLAGS -fpic
+define SH_LDFLAGS -shared
+define SH_LINKFLAGS -rdynamic
+define SH_SOEXT .so
+define SH_SOEXTVER .so.%s
+define SH_SOPREFIX -Wl,-soname,
 define LD_LIBRARY_PATH LD_LIBRARY_PATH
+define STRIPLIBFLAGS --strip-unneeded
+
+# Note: This is a helpful reference for identifying the toolchain
+#       http://sourceforge.net/apps/mediawiki/predef/index.php?title=Compilers
 
 switch -glob -- [get-define host] {
 	*-*-darwin* {
-		define SH_CFLAGS -dynamic
-		define SH_LDFLAGS "-dynamiclib"
 		define SHOBJ_CFLAGS "-dynamic -fno-common"
 		define SHOBJ_LDFLAGS "-bundle -undefined dynamic_lookup"
-		define SHOBJ_LDFLAGS_R "-bundle"
+		define SHOBJ_LDFLAGS_R -bundle
+		define SH_CFLAGS -dynamic
+		define SH_LDFLAGS -dynamiclib
+		define SH_LINKFLAGS ""
+		define SH_SOEXT .dylib
+		define SH_SOEXTVER .%s.dylib
+		define SH_SOPREFIX -Wl,-install_name,
 		define LD_LIBRARY_PATH DYLD_LIBRARY_PATH
+		define STRIPLIBFLAGS -x
 	}
-	*-*-ming* {
-		define SH_LDFLAGS -shared
+	*-*-ming* - *-*-cygwin - *-*-msys {
+		define SHOBJ_CFLAGS ""
 		define SHOBJ_LDFLAGS -shared
-		define SHOBJ_LDFLAGS_R -shared
-	}
-	*-*-cygwin {
+		define SH_CFLAGS ""
 		define SH_LDFLAGS -shared
-		define SHOBJ_LDFLAGS -shared
+		define SH_LINKFLAGS ""
+		define SH_SOEXT .dll
+		define SH_SOEXTVER .dll
+		define SH_SOPREFIX ""
+		define LD_LIBRARY_PATH PATH
+	}
+	sparc* {
+		if {[msg-quiet cc-check-decls __SUNPRO_C]} {
+			msg-result "Found sun stdio compiler"
+			# sun stdio compiler
+			# XXX: These haven't been fully tested. 
+			define SHOBJ_CFLAGS -KPIC
+			define SHOBJ_LDFLAGS "-G"
+			define SH_CFLAGS -KPIC
+			define SH_LINKFLAGS -Wl,-export-dynamic
+			define SH_SOPREFIX -Wl,-h,
+		} else {
+			# sparc has a very small GOT table limit, so use -fPIC
+			define SH_CFLAGS -fPIC
+			define SHOBJ_CFLAGS -fPIC
+		}
 	}
 	*-*-solaris* {
-		# XXX: These haven't been fully tested. 
-		#define SH_LINKFLAGS -Wl,-export-dynamic
-		define SH_CFLAGS -Kpic
-		define SHOBJ_CFLAGS -Kpic
-		define SHOBJ_LDFLAGS "-G"
+		if {[msg-quiet cc-check-decls __SUNPRO_C]} {
+			msg-result "Found sun stdio compiler"
+			# sun stdio compiler
+			# XXX: These haven't been fully tested. 
+			define SHOBJ_CFLAGS -KPIC
+			define SHOBJ_LDFLAGS "-G"
+			define SH_CFLAGS -KPIC
+			define SH_LINKFLAGS -Wl,-export-dynamic
+			define SH_SOPREFIX -Wl,-h,
+		}
 	}
 	*-*-hpux {
 		# XXX: These haven't been tested
-		define SH_LINKFLAGS -Wl,+s
-		define SH_CFLAGS +z
 		define SHOBJ_CFLAGS "+O3 +z"
 		define SHOBJ_LDFLAGS -b
+		define SH_CFLAGS +z
+		define SH_LINKFLAGS -Wl,+s
 		define LD_LIBRARY_PATH SHLIB_PATH
 	}
-	sparc* {
-		# sparc has a very small GOT table limit, so use -fPIC
-		define SH_LINKFLAGS -rdynamic
-		define SH_CFLAGS -fPIC
-		define SH_LDFLAGS -shared
-		define SHOBJ_CFLAGS -fPIC
-		define SHOBJ_LDFLAGS -shared
-	}
-	* {
-		# Generic Unix settings
-		define SH_LINKFLAGS -rdynamic
-		define SH_CFLAGS -fpic
-		define SH_LDFLAGS -shared
-		define SHOBJ_CFLAGS -fpic
-		define SHOBJ_LDFLAGS -shared
-	}
 }
 
 if {![is-defined SHOBJ_LDFLAGS_R]} {
diff --git a/autosetup/cc.tcl b/autosetup/cc.tcl
index a046184..cd033c6 100644
--- a/autosetup/cc.tcl
+++ b/autosetup/cc.tcl
@@ -116,7 +116,7 @@ proc cc-check-includes {args} {
 		set with {}
 		if {[dict exists $::autosetup(cc-include-deps) $each]} {
 			set deps [dict keys [dict get $::autosetup(cc-include-deps) $each]]
-			msg-quiet cc-check-includes $deps
+			msg-quiet cc-check-includes {*}$deps
 			foreach i $deps {
 				if {[have-feature $i]} {
 					lappend with $i
@@ -133,12 +133,14 @@ proc cc-check-includes {args} {
 	}
 }
 
-# @cc-include-needs include required
+# @cc-include-needs include required ...
 #
 # Ensures that when checking for 'include', a check is first
-# made for 'required', and if found, it is #included
-proc cc-include-needs {file depfile} {
-	dict set ::autosetup(cc-include-deps) $file $depfile 1
+# made for each 'required' file, and if found, it is #included
+proc cc-include-needs {file args} {
+	foreach depfile $args {
+		dict set ::autosetup(cc-include-deps) $file $depfile 1
+	}
 }
 
 # @cc-check-types type ...
@@ -256,6 +258,8 @@ proc cc-check-function-in-lib {function libs {otherlibs {}}} {
 # simply "ar" is assumed depending upon whether cross compiling.
 # The path is searched for this executable, and if found AR is defined
 # to the executable name.
+# Note that even when cross compiling, the simple "ar" is used as a fallback,
+# but a warning is generated. This is necessary for some toolchains.
 #
 # It is an error if the executable is not found.
 #
@@ -263,10 +267,16 @@ proc cc-check-tools {args} {
 	foreach tool $args {
 		set TOOL [string toupper $tool]
 		set exe [get-env $TOOL [get-define cross]$tool]
-		if {![find-executable $exe]} {
-			user-error "Failed to find $exe"
+		if {[find-executable {*}$exe]} {
+			define $TOOL $exe
+			continue
+		}
+		if {[find-executable {*}$tool]} {
+			msg-result "Warning: Failed to find $exe, falling back to $tool which may be incorrect"
+			define $TOOL $tool
+			continue
 		}
-		define $TOOL $exe
+		user-error "Failed to find $exe"
 	}
 }
 
@@ -491,14 +501,8 @@ proc cctest {args} {
 		set tmp conftest__.o
 		lappend cmdline -c
 	}
-	lappend cmdline {*}$opts(-cflags)
+	lappend cmdline {*}$opts(-cflags) {*}[get-define cc-default-debug ""]
 
-	switch -glob -- [get-define host] {
-		*-*-darwin* {
-			# Don't generate .dSYM directories
-			lappend cmdline -gstabs
-		}
-	}
 	lappend cmdline $src -o $tmp {*}$opts(-libs)
 
 	# At this point we have the complete command line and the
@@ -589,7 +593,7 @@ proc make-config-header {file args} {
 				continue
 			}
 			-str {
-				set value \"$value\"
+				set value \"[string map [list \\ \\\\ \" \\\"] $value]\"
 			}
 			-auto {
 				# Automatically determine the type
@@ -598,7 +602,7 @@ proc make-config-header {file args} {
 					continue
 				}
 				if {![string is integer -strict $value]} {
-					set value \"$value\"
+					set value \"[string map [list \\ \\\\ \" \\\"] $value]\"
 				}
 			}
 			"" {
@@ -659,8 +663,6 @@ if {[env-is-set CXX]} {
 # CXXFLAGS default to CFLAGS if not specified
 define CXXFLAGS [get-env CXXFLAGS [get-define CFLAGS]]
 
-cc-check-tools ld
-
 # May need a CC_FOR_BUILD, so look for one
 define CC_FOR_BUILD [find-an-executable [get-env CC_FOR_BUILD ""] cc gcc false]
 
@@ -680,6 +682,16 @@ if {[get-define CXX] ne "false"} {
 }
 msg-result "Build C compiler...[get-define CC_FOR_BUILD]"
 
+# On Darwin, we prefer to use -gstabs to avoid creating .dSYM directories
+# but some compilers don't support -gstabs, so test for it here.
+switch -glob -- [get-define host] {
+	*-*-darwin* {
+		if {[cctest -cflags {-gstabs}]} {
+			define cc-default-debug -gstabs
+		}
+	}
+}
+
 if {![cc-check-includes stdlib.h]} {
 	user-error "Compiler does not work. See config.log"
 }
diff --git a/autosetup/config.guess b/autosetup/config.guess
index 4c8f032..089ebcc 100755
--- a/autosetup/config.guess
+++ b/autosetup/config.guess
@@ -804,6 +804,9 @@ EOF
     *:MINGW*:*)
 	echo ${UNAME_MACHINE}-pc-mingw32
 	exit ;;
+    i*:MSYS*:*) 
+	echo ${UNAME_MACHINE}-pc-msys 
+	exit ;; 
     i*:windows32*:*)
     	# uname -m includes "-pc" on this system.
     	echo ${UNAME_MACHINE}-mingw32
diff --git a/autosetup/config.sub b/autosetup/config.sub
index 320e303..a09498f 100755
--- a/autosetup/config.sub
+++ b/autosetup/config.sub
@@ -798,6 +798,10 @@ case $basic_machine in
 		basic_machine=i370-ibm
 		os=-mvs
 		;;
+	msys) 
+		basic_machine=i386-pc 
+		os=-msys 
+	 ;; 
 	ncr3000)
 		basic_machine=i486-ncr
 		os=-sysv4
@@ -1315,7 +1319,7 @@ case $os in
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
 	      | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
 	      | -chorusos* | -chorusrdb* | -cegcc* \
-	      | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
+	      | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
 	      | -mingw32* | -linux-gnu* | -linux-android* \
 	      | -linux-newlib* | -linux-uclibc* \
 	      | -uxpv* | -beos* | -mpeix* | -udk* \
diff --git a/autosetup/default.auto b/autosetup/default.auto
new file mode 100644
index 0000000..b36e0f8
--- /dev/null
+++ b/autosetup/default.auto
@@ -0,0 +1,25 @@
+# Copyright (c) 2012 WorkWare Systems http://www.workware.net.au/
+# All rights reserved
+
+# Auto-load module for 'make' build system integration
+
+use init
+
+autosetup_add_init_type make {Simple "make" build system} {
+	autosetup_check_create auto.def \
+{# Initial auto.def created by 'autosetup --init=make'
+
+use cc
+
+# Add any user options here
+options {
+}
+
+make-config-header config.h
+make-template Makefile.in
+}
+
+	if {![file exists Makefile.in]} {
+		puts "Note: I don't see Makefile.in. You will probably need to create one."
+	}
+}
diff --git a/autosetup/jimsh0.c b/autosetup/jimsh0.c
index 3bf6947..bdc72e5 100644
--- a/autosetup/jimsh0.c
+++ b/autosetup/jimsh0.c
@@ -39,6 +39,7 @@
 #define TCL_PLATFORM_PATH_SEPARATOR ":"
 #define HAVE_VFORK
 #define HAVE_WAITPID
+#define HAVE_ISATTY
 #define HAVE_SYS_TIME_H
 #define HAVE_DIRENT_H
 #define HAVE_UNISTD_H
@@ -534,6 +535,7 @@ typedef struct Jim_Interp {
     Jim_Obj *liveList; 
     Jim_Obj *freeList; 
     Jim_Obj *currentScriptObj; 
+    Jim_Obj *nullScriptObj; 
     Jim_Obj *emptyObj; 
     Jim_Obj *trueObj; 
     Jim_Obj *falseObj; 
@@ -1081,124 +1083,180 @@ int Jim_globInit(Jim_Interp *interp)
 "\n"
 "\n"
 "\n"
-"package require readdir\n"
 "\n"
+"package require readdir\n"
 "\n"
 "\n"
+"proc glob.globdir {dir pattern} {\n"
+"	set result {}\n"
+"	set files [readdir $dir]\n"
+"	lappend files . ..\n"
 "\n"
+"	foreach name $files {\n"
+"		if {[string match $pattern $name]} {\n"
 "\n"
+"			if {[string index $name 0] eq \".\" && [string index $pattern 0] ne \".\"} {\n"
+"				continue\n"
+"			}\n"
+"			lappend result $name\n"
+"		}\n"
+"	}\n"
 "\n"
+"	return $result\n"
+"}\n"
 "\n"
 "\n"
 "\n"
 "\n"
+"proc glob.explode {pattern} {\n"
+"	set oldexp {}\n"
+"	set newexp {\"\"}\n"
 "\n"
+"	while 1 {\n"
+"		set oldexp $newexp\n"
+"		set newexp {}\n"
+"		set ob [string first \\{ $pattern]\n"
+"		set cb [string first \\} $pattern]\n"
 "\n"
-"proc glob {args} {\n"
+"		if {$ob < $cb && $ob != -1} {\n"
+"			set mid [string range $pattern 0 $ob-1]\n"
+"			set subexp [lassign [glob.explode [string range $pattern $ob+1 end]] pattern]\n"
+"			if {$pattern eq \"\"} {\n"
+"				error \"unmatched open brace in glob pattern\"\n"
+"			}\n"
+"			set pattern [string range $pattern 1 end]\n"
 "\n"
+"			foreach subs $subexp {\n"
+"				foreach sub [split $subs ,] {\n"
+"					foreach old $oldexp {\n"
+"						lappend newexp $old$mid$sub\n"
+"					}\n"
+"				}\n"
+"			}\n"
+"		} elseif {$cb != -1} {\n"
+"			set suf  [string range $pattern 0 $cb-1]\n"
+"			set rest [string range $pattern $cb end]\n"
+"			break\n"
+"		} else {\n"
+"			set suf  $pattern\n"
+"			set rest \"\"\n"
+"			break\n"
+"		}\n"
+"	}\n"
 "\n"
+"	foreach old $oldexp {\n"
+"		lappend newexp $old$suf\n"
+"	}\n"
+"	linsert $newexp 0 $rest\n"
+"}\n"
 "\n"
 "\n"
-"	local proc glob.readdir_pattern {dir pattern} {\n"
-"		set result {}\n"
 "\n"
+"proc glob.glob {base pattern} {\n"
+"	set dir [file dirname $pattern]\n"
+"	if {$pattern eq $dir || $pattern eq \"\"} {\n"
+"		return [list [file join $base $dir] $pattern]\n"
+"	} elseif {$pattern eq [file tail $pattern]} {\n"
+"		set dir \"\"\n"
+"	}\n"
 "\n"
-"		if {$pattern in {. ..}} {\n"
-"			return $pattern\n"
-"		}\n"
 "\n"
+"	set dirlist [glob.glob $base $dir]\n"
+"	set pattern [file tail $pattern]\n"
 "\n"
-"		if {[string match {*[[*?]*} $pattern]} {\n"
 "\n"
-"			set files [readdir -nocomplain $dir]\n"
-"		} elseif {[file isdir $dir] && [file exists $dir/$pattern]} {\n"
-"			set files [list $pattern]\n"
-"		} else {\n"
-"			set files \"\"\n"
+"	set result {}\n"
+"	foreach {realdir dir} $dirlist {\n"
+"		if {![file isdir $realdir]} {\n"
+"			continue\n"
 "		}\n"
-"\n"
-"		foreach name $files {\n"
-"			if {[string match $pattern $name]} {\n"
-"\n"
-"				if {[string index $name 0] eq \".\" && [string index $pattern 0] ne \".\"} {\n"
-"					continue\n"
-"				}\n"
-"				lappend result $name\n"
-"			}\n"
+"		if {[string index $dir end] ne \"/\" && $dir ne \"\"} {\n"
+"			append dir /\n"
+"		}\n"
+"		foreach name [glob.globdir $realdir $pattern] {\n"
+"			lappend result [file join $realdir $name] $dir$name\n"
 "		}\n"
-"\n"
-"		return $result\n"
 "	}\n"
+"	return $result\n"
+"}\n"
 "\n"
 "\n"
 "\n"
 "\n"
 "\n"
-"	proc glob.expandbraces {pattern} {\n"
 "\n"
 "\n"
-"		if {[set fb [string first \"\\{\" $pattern]] < 0} {\n"
-"			return [list $pattern]\n"
-"		}\n"
-"		if {[set nb [string first \"\\}\" $pattern $fb]] < 0} {\n"
-"			return [list $pattern]\n"
-"		}\n"
-"		set before [string range $pattern 0 $fb-1]\n"
-"		set braced [string range $pattern $fb+1 $nb-1]\n"
-"		set after [string range $pattern $nb+1 end]\n"
 "\n"
-"		lmap part [split $braced ,] {\n"
-"			set pat $before$part$after\n"
-"		}\n"
-"	}\n"
 "\n"
 "\n"
-"	proc glob.glob {pattern} {\n"
-"		set dir [file dirname $pattern]\n"
-"		if {$dir eq $pattern} {\n"
 "\n"
-"			return [list $dir]\n"
-"		}\n"
 "\n"
+"proc glob {args} {\n"
+"	set nocomplain 0\n"
+"	set base \"\"\n"
 "\n"
-"		set dirlist [glob.glob $dir]\n"
-"		set pattern [file tail $pattern]\n"
+"	set n 0\n"
+"	foreach arg $args {\n"
+"		if {[info exists param]} {\n"
+"			set $param $arg\n"
+"			unset param\n"
+"			incr n\n"
+"			continue\n"
+"		}\n"
+"		switch -glob -- $arg {\n"
+"			-d* {\n"
+"				set switch $arg\n"
+"				set param base\n"
+"			}\n"
+"			-n* {\n"
+"				set nocomplain 1\n"
+"			}\n"
+"			-t* {\n"
 "\n"
+"			}\n"
 "\n"
-"		set result {}\n"
-"		foreach dir $dirlist {\n"
-"			set globdir $dir\n"
-"			if {[string match \"*/\" $dir]} {\n"
-"				set sep \"\"\n"
-"			} elseif {$dir eq \".\"} {\n"
-"				set globdir \"\"\n"
-"				set sep \"\"\n"
-"			} else {\n"
-"				set sep /\n"
+"			-* {\n"
+"				return -code error \"bad option \\\"$switch\\\": must be -directory, -nocomplain, -tails, or --\"\n"
 "			}\n"
-"			foreach pat [glob.expandbraces $pattern] {\n"
-"				foreach name [glob.readdir_pattern $dir $pat] {\n"
-"					lappend result $globdir$sep$name\n"
-"				}\n"
+"			-- {\n"
+"				incr n\n"
+"				break\n"
+"			}\n"
+"			*  {\n"
+"				break\n"
 "			}\n"
 "		}\n"
-"		return $result\n"
+"		incr n\n"
 "	}\n"
-"\n"
-"\n"
-"	set nocomplain 0\n"
-"\n"
-"	if {[lindex $args 0] eq \"-nocomplain\"} {\n"
-"		set nocomplain 1\n"
-"		set args [lrange $args 1 end]\n"
+"	if {[info exists param]} {\n"
+"		return -code error \"missing argument to \\\"$switch\\\"\"\n"
+"	}\n"
+"	if {[llength $args] <= $n} {\n"
+"		return -code error \"wrong # args: should be \\\"glob ?options? pattern ?pattern ...?\\\"\"\n"
 "	}\n"
 "\n"
+"	set args [lrange $args $n end]\n"
+"\n"
 "	set result {}\n"
 "	foreach pattern $args {\n"
-"		lappend result {*}[glob.glob $pattern]\n"
+"		set pattern [string map {\n"
+"			\\\\\\\\ \\x01 \\\\\\{ \\x02 \\\\\\} \\x03 \\\\, \\x04\n"
+"		} $pattern]\n"
+"		set patexps [lassign [glob.explode $pattern] rest]\n"
+"		if {$rest ne \"\"} {\n"
+"			return -code error \"unmatched close brace in glob pattern\"\n"
+"		}\n"
+"		foreach patexp $patexps {\n"
+"			set patexp [string map {\n"
+"				\\x01 \\\\\\\\ \\x02 \\{ \\x03 \\} \\x04 ,\n"
+"			} $patexp]\n"
+"			foreach {realname name} [glob.glob $base $patexp] {\n"
+"				lappend result $name\n"
+"			}\n"
+"		}\n"
 "	}\n"
 "\n"
-"	if {$nocomplain == 0 && [llength $result] == 0} {\n"
+"	if {!$nocomplain && [llength $result] == 0} {\n"
 "		return -code error \"no files matched glob patterns\"\n"
 "	}\n"
 "\n"
@@ -1631,6 +1689,7 @@ int Jim_tclcompatInit(Jim_Interp *interp)
 }
 
 
+
 #include <stdio.h>
 #include <string.h>
 #include <errno.h>
@@ -1654,6 +1713,13 @@ int Jim_tclcompatInit(Jim_Interp *interp)
 #define AIO_CMD_LEN 32      
 #define AIO_BUF_LEN 256     
 
+#ifndef HAVE_FTELLO
+    #define ftello ftell
+#endif
+#ifndef HAVE_FSEEKO
+    #define fseeko fseek
+#endif
+
 #define AIO_KEEPOPEN 1
 
 #if defined(JIM_IPV6)
@@ -1937,6 +2003,18 @@ static int aio_cmd_puts(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
     return JIM_ERR;
 }
 
+static int aio_cmd_isatty(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
+{
+#ifdef HAVE_ISATTY
+    AioFile *af = Jim_CmdPrivData(interp);
+    Jim_SetResultInt(interp, isatty(fileno(af->fp)));
+#else
+    Jim_SetResultInt(interp, 0);
+#endif
+
+    return JIM_OK;
+}
+
 
 static int aio_cmd_flush(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
@@ -1967,7 +2045,7 @@ static int aio_cmd_seek(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
     AioFile *af = Jim_CmdPrivData(interp);
     int orig = SEEK_SET;
-    long offset;
+    jim_wide offset;
 
     if (argc == 2) {
         if (Jim_CompareStringImmediate(interp, argv[1], "start"))
@@ -1980,10 +2058,10 @@ static int aio_cmd_seek(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
             return -1;
         }
     }
-    if (Jim_GetLong(interp, argv[0], &offset) != JIM_OK) {
+    if (Jim_GetWide(interp, argv[0], &offset) != JIM_OK) {
         return JIM_ERR;
     }
-    if (fseek(af->fp, offset, orig) == -1) {
+    if (fseeko(af->fp, offset, orig) == -1) {
         JimAioSetError(interp, af->filename);
         return JIM_ERR;
     }
@@ -1994,7 +2072,7 @@ static int aio_cmd_tell(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
     AioFile *af = Jim_CmdPrivData(interp);
 
-    Jim_SetResultInt(interp, ftell(af->fp));
+    Jim_SetResultInt(interp, ftello(af->fp));
     return JIM_OK;
 }
 
@@ -2170,6 +2248,13 @@ static const jim_subcmd_type aio_command_table[] = {
         2,
         
     },
+    {   "isatty",
+        NULL,
+        aio_cmd_isatty,
+        0,
+        0,
+        
+    },
     {   "flush",
         NULL,
         aio_cmd_flush,
@@ -3050,7 +3135,9 @@ static int file_cmd_dirname(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
     const char *path = Jim_String(argv[0]);
     const char *p = strrchr(path, '/');
 
-    if (!p) {
+    if (!p && path[0] == '.' && path[1] == '.' && path[2] == '\0') {
+        Jim_SetResultString(interp, "..", -1);
+    } else if (!p) {
         Jim_SetResultString(interp, ".", -1);
     }
     else if (p == path) {
@@ -3118,12 +3205,13 @@ static int file_cmd_normalize(Jim_Interp *interp, int argc, Jim_Obj *const *argv
 
     if (realpath(path, newname)) {
         Jim_SetResult(interp, Jim_NewStringObjNoAlloc(interp, newname, -1));
+        return JIM_OK;
     }
     else {
         Jim_Free(newname);
-        Jim_SetResult(interp, argv[0]);
+        Jim_SetResultFormatted(interp, "can't normalize \"%#s\": %s", argv[0], strerror(errno));
+        return JIM_ERR;
     }
-    return JIM_OK;
 #else
     Jim_SetResultString(interp, "Not implemented", -1);
     return JIM_ERR;
@@ -4936,7 +5024,7 @@ static char **JimSaveEnv(char **env)
 
 static void JimRestoreEnv(char **env)
 {
-    JimFreeEnv(env, NULL);
+    JimFreeEnv(env, Jim_GetEnviron());
 }
 
 static Jim_Obj *
@@ -5872,11 +5960,98 @@ static int JimCheckConversion(const char *str, const char *endptr)
     return JIM_OK;
 }
 
+static int JimNumberBase(const char *str, int *base, int *sign)
+{
+    int i = 0;
+
+    *base = 10;
+
+    while (isspace(UCHAR(str[i]))) {
+        i++;
+    }
+
+    if (str[i] == '-') {
+        *sign = -1;
+        i++;
+    }
+    else {
+        if (str[i] == '+') {
+            i++;
+        }
+        *sign = 1;
+    }
+
+    if (str[i] != '0') {
+        
+        return 0;
+    }
+
+    
+    switch (str[i + 1]) {
+        case 'x': case 'X': *base = 16; break;
+        case 'o': case 'O': *base = 8; break;
+        case 'b': case 'B': *base = 2; break;
+        default: return 0;
+    }
+    i += 2;
+    
+    if (str[i] != '-' && str[i] != '+' && !isspace(UCHAR(str[i]))) {
+        
+        return i;
+    }
+    
+    return 10;
+}
+
+static long jim_strtol(const char *str, char **endptr)
+{
+    int sign;
+    int base;
+    int i = JimNumberBase(str, &base, &sign);
+
+    if (base != 10) {
+        long value = strtol(str + i, endptr, base);
+        if (endptr == NULL || *endptr != str + i) {
+            return value * sign;
+        }
+    }
+
+    
+    return strtol(str, endptr, 10);
+}
+
+
+static jim_wide jim_strtoull(const char *str, char **endptr)
+{
+#ifdef HAVE_LONG_LONG
+    int sign;
+    int base;
+    int i = JimNumberBase(str, &base, &sign);
+
+    if (base != 10) {
+        jim_wide value = strtoull(str + i, endptr, base);
+        if (endptr == NULL || *endptr != str + i) {
+            return value * sign;
+        }
+    }
+
+    
+    return strtoull(str, endptr, 10);
+#else
+    return (unsigned long)jim_strtol(str, endptr);
+#endif
+}
+
 int Jim_StringToWide(const char *str, jim_wide * widePtr, int base)
 {
     char *endptr;
 
-    *widePtr = strtoull(str, &endptr, base);
+    if (base) {
+        *widePtr = strtoull(str, &endptr, base);
+    }
+    else {
+        *widePtr = jim_strtoull(str, &endptr);
+    }
 
     return JimCheckConversion(str, endptr);
 }
@@ -7392,23 +7567,6 @@ void Jim_InvalidateStringRep(Jim_Obj *objPtr)
     objPtr->bytes = NULL;
 }
 
-#define Jim_SetStringRep(o, b, l) \
-    do { (o)->bytes = b; (o)->length = l; } while (0)
-
-void Jim_InitStringRep(Jim_Obj *objPtr, const char *bytes, int length)
-{
-    if (length == 0) {
-        objPtr->bytes = JimEmptyStringRep;
-        objPtr->length = 0;
-    }
-    else {
-        objPtr->bytes = Jim_Alloc(length + 1);
-        objPtr->length = length;
-        memcpy(objPtr->bytes, bytes, length);
-        objPtr->bytes[length] = '\0';
-    }
-}
-
 
 Jim_Obj *Jim_DuplicateObj(Jim_Interp *interp, Jim_Obj *objPtr)
 {
@@ -7419,8 +7577,18 @@ Jim_Obj *Jim_DuplicateObj(Jim_Interp *interp, Jim_Obj *objPtr)
         
         dupPtr->bytes = NULL;
     }
+    else if (objPtr->length == 0) {
+        
+        dupPtr->bytes = JimEmptyStringRep;
+        dupPtr->length = 0;
+        dupPtr->typePtr = NULL;
+        return dupPtr;
+    }
     else {
-        Jim_InitStringRep(dupPtr, objPtr->bytes, objPtr->length);
+        dupPtr->bytes = Jim_Alloc(objPtr->length + 1);
+        dupPtr->length = objPtr->length;
+        
+        memcpy(dupPtr->bytes, objPtr->bytes, objPtr->length + 1);
     }
 
     
@@ -7598,9 +7766,8 @@ Jim_Obj *Jim_NewStringObjNoAlloc(Jim_Interp *interp, char *s, int len)
 {
     Jim_Obj *objPtr = Jim_NewObj(interp);
 
-    if (len == -1)
-        len = strlen(s);
-    Jim_SetStringRep(objPtr, s, len);
+    objPtr->bytes = s;
+    objPtr->length = len == -1 ? strlen(s) : len;
     objPtr->typePtr = NULL;
     return objPtr;
 }
@@ -7820,7 +7987,7 @@ Jim_Obj *JimStringReplaceObj(Jim_Interp *interp,
         return NULL;
     }
 
-    if (last <= first) {
+    if (last < first) {
         return strObjPtr;
     }
 
@@ -8171,7 +8338,7 @@ void FreeSourceInternalRep(Jim_Interp *interp, Jim_Obj *objPtr)
 
 void DupSourceInternalRep(Jim_Interp *interp, Jim_Obj *srcPtr, Jim_Obj *dupPtr)
 {
-    dupPtr->internalRep = srcPtr->internalRep;
+    dupPtr->internalRep.sourceValue = srcPtr->internalRep.sourceValue;
     Jim_IncrRefCount(dupPtr->internalRep.sourceValue.fileNameObj);
 }
 
@@ -8179,7 +8346,7 @@ static void JimSetSourceInfo(Jim_Interp *interp, Jim_Obj *objPtr,
     Jim_Obj *fileNameObj, int lineNumber)
 {
     JimPanic((Jim_IsShared(objPtr), "JimSetSourceInfo called with shared object"));
-    JimPanic((objPtr->typePtr != NULL, "JimSetSourceInfo called with typePtr != NULL"));
+    JimPanic((objPtr->typePtr == &sourceObjType, "JimSetSourceInfo called with non-source object"));
     Jim_IncrRefCount(fileNameObj);
     objPtr->internalRep.sourceValue.fileNameObj = fileNameObj;
     objPtr->internalRep.sourceValue.lineNumber = lineNumber;
@@ -8559,9 +8726,12 @@ static int SetScriptFromAny(Jim_Interp *interp, struct Jim_Obj *objPtr, struct J
 
 ScriptObj *Jim_GetScript(Jim_Interp *interp, Jim_Obj *objPtr)
 {
-    struct ScriptObj *script = Jim_GetIntRepPtr(objPtr);
+    if (objPtr == interp->emptyObj) {
+        
+        objPtr = interp->nullScriptObj;
+    }
 
-    if (objPtr->typePtr != &scriptObjType || script->substFlags) {
+    if (objPtr->typePtr != &scriptObjType || ((struct ScriptObj *)Jim_GetIntRepPtr(objPtr))->substFlags) {
         SetScriptFromAny(interp, objPtr, NULL);
     }
     return (ScriptObj *) Jim_GetIntRepPtr(objPtr);
@@ -10047,12 +10217,14 @@ Jim_Interp *Jim_CreateInterp(void)
     i->unknown = Jim_NewStringObj(i, "unknown", -1);
     i->errorProc = i->emptyObj;
     i->currentScriptObj = Jim_NewEmptyStringObj(i);
+    i->nullScriptObj = Jim_NewEmptyStringObj(i);
     Jim_IncrRefCount(i->emptyObj);
     Jim_IncrRefCount(i->errorFileNameObj);
     Jim_IncrRefCount(i->result);
     Jim_IncrRefCount(i->stackTrace);
     Jim_IncrRefCount(i->unknown);
     Jim_IncrRefCount(i->currentScriptObj);
+    Jim_IncrRefCount(i->nullScriptObj);
     Jim_IncrRefCount(i->errorProc);
     Jim_IncrRefCount(i->trueObj);
     Jim_IncrRefCount(i->falseObj);
@@ -10086,6 +10258,7 @@ void Jim_FreeInterp(Jim_Interp *i)
     Jim_DecrRefCount(i, i->unknown);
     Jim_DecrRefCount(i, i->errorFileNameObj);
     Jim_DecrRefCount(i, i->currentScriptObj);
+    Jim_DecrRefCount(i, i->nullScriptObj);
     Jim_FreeHashTable(&i->commands);
 #ifdef JIM_REFERENCES
     Jim_FreeHashTable(&i->references);
@@ -10161,7 +10334,7 @@ Jim_CallFrame *Jim_GetCallFrameByLevel(Jim_Interp *interp, Jim_Obj *levelObjPtr)
         if (str[0] == '#') {
             char *endptr;
 
-            level = strtol(str + 1, &endptr, 0);
+            level = jim_strtol(str + 1, &endptr);
             if (str[1] == '\0' || endptr[0] != '\0') {
                 level = -1;
             }
@@ -10824,9 +10997,7 @@ static int SetListFromAny(Jim_Interp *interp, struct Jim_Obj *objPtr)
         return JIM_OK;
     }
 
-#if 0
-    
-    if (Jim_IsDict(objPtr)) {
+    if (Jim_IsDict(objPtr) && !Jim_IsShared(objPtr)) {
         Jim_Obj **listObjPtrPtr;
         int len;
         int i;
@@ -10845,7 +11016,6 @@ static int SetListFromAny(Jim_Interp *interp, struct Jim_Obj *objPtr)
 
         return JIM_OK;
     }
-#endif
 
     
     if (objPtr->typePtr == &sourceObjType) {
@@ -10868,16 +11038,18 @@ static int SetListFromAny(Jim_Interp *interp, struct Jim_Obj *objPtr)
     objPtr->internalRep.listValue.ele = NULL;
 
     
-    JimParserInit(&parser, str, strLen, linenr);
-    while (!parser.eof) {
-        Jim_Obj *elementPtr;
+    if (strLen) {
+        JimParserInit(&parser, str, strLen, linenr);
+        while (!parser.eof) {
+            Jim_Obj *elementPtr;
 
-        JimParseList(&parser);
-        if (parser.tt != JIM_TT_STR && parser.tt != JIM_TT_ESC)
-            continue;
-        elementPtr = JimParserGetTokenObj(interp, &parser);
-        JimSetSourceInfo(interp, elementPtr, fileNameObj, parser.tline);
-        ListAppendElement(objPtr, elementPtr);
+            JimParseList(&parser);
+            if (parser.tt != JIM_TT_STR && parser.tt != JIM_TT_ESC)
+                continue;
+            elementPtr = JimParserGetTokenObj(interp, &parser);
+            JimSetSourceInfo(interp, elementPtr, fileNameObj, parser.tline);
+            ListAppendElement(objPtr, elementPtr);
+        }
     }
     Jim_DecrRefCount(interp, fileNameObj);
     return JIM_OK;
@@ -11684,7 +11856,7 @@ int SetIndexFromAny(Jim_Interp *interp, Jim_Obj *objPtr)
         idx = 0;
     }
     else {
-        idx = strtol(str, &endptr, 0);
+        idx = jim_strtol(str, &endptr);
 
         if (endptr == str) {
             goto badindex;
@@ -11696,7 +11868,7 @@ int SetIndexFromAny(Jim_Interp *interp, Jim_Obj *objPtr)
     if (*str == '+' || *str == '-') {
         int sign = (*str == '+' ? 1 : -1);
 
-        idx += sign * strtol(++str, &endptr, 0);
+        idx += sign * jim_strtol(++str, &endptr);
         if (str == endptr || *endptr) {
             goto badindex;
         }
@@ -12771,28 +12943,53 @@ singlechar:
 static int JimParseExprNumber(struct JimParserCtx *pc)
 {
     int allowdot = 1;
-    int allowhex = 0;
+    int base = 10;
 
     
     pc->tt = JIM_TT_EXPR_INT;
     pc->tstart = pc->p;
     pc->tline = pc->linenr;
+
+    
+    if (pc->p[0] == '0') {
+        switch (pc->p[1]) {
+            case 'x':
+            case 'X':
+                base = 16;
+                allowdot = 0;
+                pc->p += 2;
+                pc->len -= 2;
+                break;
+            case 'o':
+            case 'O':
+                base = 8;
+                allowdot = 0;
+                pc->p += 2;
+                pc->len -= 2;
+                break;
+            case 'b':
+            case 'B':
+                base = 2;
+                allowdot = 0;
+                pc->p += 2;
+                pc->len -= 2;
+                break;
+        }
+    }
+
     while (isdigit(UCHAR(*pc->p))
-        || (allowhex && isxdigit(UCHAR(*pc->p)))
+        || (base == 16 && isxdigit(UCHAR(*pc->p)))
+        || (base == 8 && *pc->p >= '0' && *pc->p <= '7')
+        || (base == 2 && (*pc->p == '0' || *pc->p == '1'))
         || (allowdot && *pc->p == '.')
-        || (pc->p - pc->tstart == 1 && *pc->tstart == '0' && (*pc->p == 'x' || *pc->p == 'X'))
         ) {
-        if ((*pc->p == 'x') || (*pc->p == 'X')) {
-            allowhex = 1;
-            allowdot = 0;
-        }
         if (*pc->p == '.') {
             allowdot = 0;
             pc->tt = JIM_TT_EXPR_DOUBLE;
         }
         pc->p++;
         pc->len--;
-        if (!allowhex && (*pc->p == 'e' || *pc->p == 'E') && (pc->p[1] == '-' || pc->p[1] == '+'
+        if (base == 10 && (*pc->p == 'e' || *pc->p == 'E') && (pc->p[1] == '-' || pc->p[1] == '+'
                 || isdigit(UCHAR(pc->p[1])))) {
             pc->p += 2;
             pc->len -= 2;
@@ -13185,8 +13382,9 @@ static ExprByteCode *ExprCreateByteCode(Jim_Interp *interp, const ParseTokenList
             case JIM_TT_DICTSUGAR:
             case JIM_TT_EXPRSUGAR:
             case JIM_TT_CMD:
-                token->objPtr = Jim_NewStringObj(interp, t->token, t->len);
                 token->type = t->type;
+strexpr:
+                token->objPtr = Jim_NewStringObj(interp, t->token, t->len);
                 if (t->type == JIM_TT_CMD) {
                     
                     JimSetSourceInfo(interp, token->objPtr, fileNameObj, t->line);
@@ -13195,15 +13393,24 @@ static ExprByteCode *ExprCreateByteCode(Jim_Interp *interp, const ParseTokenList
                 break;
 
             case JIM_TT_EXPR_INT:
-                token->objPtr = Jim_NewIntObj(interp, strtoull(t->token, NULL, 0));
-                token->type = t->type;
-                expr->len++;
-                break;
-
             case JIM_TT_EXPR_DOUBLE:
-                token->objPtr = Jim_NewDoubleObj(interp, strtod(t->token, NULL));
-                token->type = t->type;
-                expr->len++;
+                {
+                    char *endptr;
+                    if (t->type == JIM_TT_EXPR_INT) {
+                        token->objPtr = Jim_NewIntObj(interp, jim_strtoull(t->token, &endptr));
+                    }
+                    else {
+                        token->objPtr = Jim_NewDoubleObj(interp, strtod(t->token, &endptr));
+                    }
+                    if (endptr != t->token + t->len) {
+                        
+                        Jim_FreeNewObj(interp, token->objPtr);
+                        token->type = JIM_TT_STR;
+                        goto strexpr;
+                    }
+                    token->type = t->type;
+                    expr->len++;
+                }
                 break;
 
             case JIM_TT_SUBEXPR_START:
@@ -13986,9 +14193,11 @@ static int ScanOneEntry(Jim_Interp *interp, const char *str, int pos, int strLen
                         : descr->type == 'x' ? 16 : descr->type == 'i' ? 0 : 10;
 
                     
-                    w = strtoull(tok, &endp, base);
-                    if (endp == tok && base == 0) {
-                        w = strtoull(tok, &endp, 10);
+                    if (base == 0) {
+                        w = jim_strtoull(tok, &endp);
+                    }
+                    else {
+                        w = strtoull(tok, &endp, base);
                     }
 
                     if (endp != tok) {
@@ -14819,6 +15028,11 @@ static int JimCallProcedure(Jim_Interp *interp, Jim_Cmd *cmd, int argc, Jim_Obj
         return JIM_ERR;
     }
 
+    if (Jim_Length(cmd->u.proc.bodyObjPtr) == 0) {
+        
+        return JIM_OK;
+    }
+
     
     if (interp->framePtr->level == interp->maxCallFrameDepth) {
         Jim_SetResultString(interp, "Too many nested calls. Infinite recursion?", -1);
@@ -15081,74 +15295,45 @@ int Jim_EvalFile(Jim_Interp *interp, const char *filename)
     return retcode;
 }
 
-static int JimParseSubstStr(struct JimParserCtx *pc)
+static void JimParseSubst(struct JimParserCtx *pc, int flags)
 {
     pc->tstart = pc->p;
     pc->tline = pc->linenr;
-    while (pc->len && *pc->p != '$' && *pc->p != '[') {
-        if (*pc->p == '\\' && pc->len > 1) {
-            pc->p++;
-            pc->len--;
-        }
-        pc->p++;
-        pc->len--;
-    }
-    pc->tend = pc->p - 1;
-    pc->tt = JIM_TT_ESC;
-    return JIM_OK;
-}
-
-static int JimParseSubst(struct JimParserCtx *pc, int flags)
-{
-    int retval;
 
     if (pc->len == 0) {
-        pc->tstart = pc->tend = pc->p;
-        pc->tline = pc->linenr;
+        pc->tend = pc->p;
         pc->tt = JIM_TT_EOL;
         pc->eof = 1;
-        return JIM_OK;
+        return;
     }
-    switch (*pc->p) {
-        case '[':
-            retval = JimParseCmd(pc);
-            if (flags & JIM_SUBST_NOCMD) {
-                pc->tstart--;
-                pc->tend++;
-                pc->tt = (flags & JIM_SUBST_NOESC) ? JIM_TT_STR : JIM_TT_ESC;
-            }
-            return retval;
-            break;
-        case '$':
-            if (JimParseVar(pc) == JIM_ERR) {
-                pc->tstart = pc->tend = pc->p++;
-                pc->len--;
-                pc->tline = pc->linenr;
-                pc->tt = JIM_TT_STR;
-            }
-            else {
-                if (flags & JIM_SUBST_NOVAR) {
-                    pc->tstart--;
-                    if (flags & JIM_SUBST_NOESC)
-                        pc->tt = JIM_TT_STR;
-                    else
-                        pc->tt = JIM_TT_ESC;
-                    if (*pc->tstart == '{') {
-                        pc->tstart--;
-                        if (*(pc->tend + 1))
-                            pc->tend++;
-                    }
-                }
-            }
+    if (*pc->p == '[' && !(flags & JIM_SUBST_NOCMD)) {
+        JimParseCmd(pc);
+        return;
+    }
+    if (*pc->p == '$' && !(flags & JIM_SUBST_NOVAR)) {
+        if (JimParseVar(pc) == JIM_OK) {
+            return;
+        }
+        
+        pc->tstart = pc->p;
+        flags |= JIM_SUBST_NOVAR;
+    }
+    while (pc->len) {
+        if (*pc->p == '$' && !(flags & JIM_SUBST_NOVAR)) {
             break;
-        default:
-            retval = JimParseSubstStr(pc);
-            if (flags & JIM_SUBST_NOESC)
-                pc->tt = JIM_TT_STR;
-            return retval;
+        }
+        if (*pc->p == '[' && !(flags & JIM_SUBST_NOCMD)) {
             break;
+        }
+        if (*pc->p == '\\' && pc->len > 1) {
+            pc->p++;
+            pc->len--;
+        }
+        pc->p++;
+        pc->len--;
     }
-    return JIM_OK;
+    pc->tend = pc->p - 1;
+    pc->tt = (flags & JIM_SUBST_NOESC) ? JIM_TT_STR : JIM_TT_ESC;
 }
 
 
@@ -17175,6 +17360,9 @@ static int Jim_StringCoreCommand(Jim_Interp *interp, int argc, Jim_Obj *const *a
     static const char * const nocase_options[] = {
         "-nocase", NULL
     };
+    static const char * const nocase_length_options[] = {
+        "-nocase", "-length", NULL
+    };
 
     if (argc < 2) {
         Jim_WrongNumArgs(interp, 1, argv, "option ?arguments ...?");
@@ -17202,23 +17390,54 @@ static int Jim_StringCoreCommand(Jim_Interp *interp, int argc, Jim_Obj *const *a
 
         case OPT_COMPARE:
         case OPT_EQUAL:
-            if (argc != 4 &&
-                (argc != 5 ||
-                    Jim_GetEnum(interp, argv[2], nocase_options, &opt_case, NULL,
-                        JIM_ENUM_ABBREV) != JIM_OK)) {
-                Jim_WrongNumArgs(interp, 2, argv, "?-nocase? string1 string2");
-                return JIM_ERR;
-            }
-            if (opt_case == 0) {
-                argv++;
-            }
-            if (option == OPT_COMPARE || !opt_case) {
-                Jim_SetResultInt(interp, Jim_StringCompareObj(interp, argv[2], argv[3], !opt_case));
-            }
-            else {
-                Jim_SetResultBool(interp, Jim_StringEqObj(argv[2], argv[3]));
+            {
+                
+                long opt_length = -1;
+                int n = argc - 4;
+                int i = 2;
+                while (n > 0) {
+                    int subopt;
+                    if (Jim_GetEnum(interp, argv[i++], nocase_length_options, &subopt, NULL,
+                            JIM_ENUM_ABBREV) != JIM_OK) {
+badcompareargs:
+                        Jim_WrongNumArgs(interp, 2, argv, "?-nocase? ?-length int? string1 string2");
+                        return JIM_ERR;
+                    }
+                    if (subopt == 0) {
+                        
+                        opt_case = 0;
+                        n--;
+                    }
+                    else {
+                        
+                        if (n < 2) {
+                            goto badcompareargs;
+                        }
+                        if (Jim_GetLong(interp, argv[i++], &opt_length) != JIM_OK) {
+                            return JIM_ERR;
+                        }
+                        n -= 2;
+                    }
+                }
+                if (n) {
+                    goto badcompareargs;
+                }
+                argv += argc - 2;
+                if (opt_length < 0 && option != OPT_COMPARE && opt_case) {
+                    
+                    Jim_SetResultBool(interp, Jim_StringEqObj(argv[0], argv[1]));
+                }
+                else {
+                    if (opt_length >= 0) {
+                        n = JimStringCompareLen(Jim_String(argv[0]), Jim_String(argv[1]), opt_length, !opt_case);
+                    }
+                    else {
+                        n = Jim_StringCompareObj(interp, argv[0], argv[1], !opt_case);
+                    }
+                    Jim_SetResultInt(interp, option == OPT_COMPARE ? n : n == 0);
+                }
+                return JIM_OK;
             }
-            return JIM_OK;
 
         case OPT_MATCH:
             if (argc != 4 &&
@@ -17283,7 +17502,7 @@ static int Jim_StringCoreCommand(Jim_Interp *interp, int argc, Jim_Obj *const *a
                 Jim_Obj *objPtr;
 
                 if (argc != 5 && argc != 6) {
-                    Jim_WrongNumArgs(interp, 2, argv, "string first last ?newstring?");
+                    Jim_WrongNumArgs(interp, 2, argv, "string first last ?string?");
                     return JIM_ERR;
                 }
                 objPtr = JimStringReplaceObj(interp, argv[2], argv[3], argv[4], argc == 6 ? argv[5] : NULL);
@@ -17741,9 +17960,9 @@ static int JimInfoReferences(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 
     htiter = Jim_GetHashTableIterator(&interp->references);
     while ((he = Jim_NextHashEntry(htiter)) != NULL) {
-        char buf[JIM_REFERENCE_SPACE];
+        char buf[JIM_REFERENCE_SPACE + 1];
         Jim_Reference *refPtr = he->u.val;
-        const jim_wide *refId = he->key;
+        const unsigned long *refId = he->key;
 
         JimFormatReference(buf, refPtr, *refId);
         Jim_ListAppendElement(interp, listObjPtr, Jim_NewStringObj(interp, buf, -1));
@@ -17990,7 +18209,6 @@ static int Jim_InfoCoreCommand(Jim_Interp *interp, int argc, Jim_Obj *const *arg
     int cmd;
     Jim_Obj *objPtr;
     int mode = 0;
-    int nons = 0;
 
     static const char * const commands[] = {
         "body", "statics", "commands", "procs", "channels", "exists", "globals", "level", "frame", "locals",
@@ -18005,16 +18223,21 @@ static int Jim_InfoCoreCommand(Jim_Interp *interp, int argc, Jim_Obj *const *arg
         INFO_RETURNCODES, INFO_REFERENCES, INFO_ALIAS
     };
 
-    if (argc < 2) {
-        Jim_WrongNumArgs(interp, 1, argv, "subcommand ?args ...?");
-        return JIM_ERR;
-    }
+#ifdef jim_ext_namespace
+    int nons = 0;
+
     if (argc > 2 && Jim_CompareStringImmediate(interp, argv[1], "-nons")) {
         
         argc--;
         argv++;
         nons = 1;
     }
+#endif
+
+    if (argc < 2) {
+        Jim_WrongNumArgs(interp, 1, argv, "subcommand ?args ...?");
+        return JIM_ERR;
+    }
     if (Jim_GetEnum(interp, argv[1], commands, &cmd, "subcommand", JIM_ERRMSG | JIM_ENUM_ABBREV)
         != JIM_OK) {
         return JIM_ERR;
diff --git a/autosetup/system.tcl b/autosetup/system.tcl
index f05d05b..2712e39 100644
--- a/autosetup/system.tcl
+++ b/autosetup/system.tcl
@@ -217,7 +217,8 @@ if {$host eq ""} {
 }
 define cross [get-env CROSS $cross]
 
-set prefix [opt-val prefix /usr/local]
+# Do "define defaultprefix myvalue" to set the default prefix *before* the first "use"
+set prefix [opt-val prefix [get-define defaultprefix /usr/local]]
 
 # These are for compatibility with autoconf
 define target [get-define host]
@@ -254,7 +255,7 @@ define SHELL [get-env SHELL [find-an-executable sh bash ksh]]
 
 # Windows vs. non-Windows
 switch -glob -- [get-define host] {
-	*-*-ming* - *-*-cygwin {
+	*-*-ming* - *-*-cygwin - *-*-msys {
 		define-feature windows
 		define EXEEXT .exe
 	}
diff --git a/configure b/configure
index 1c5586f..8367bd8 100755
--- a/configure
+++ b/configure
@@ -1,3 +1,3 @@
 #!/bin/sh
 dir="`dirname "$0"`/autosetup"
-WRAPPER="$0" exec "`$dir/find-tclsh`" "$dir/autosetup" "$@"
+WRAPPER="$0"; export WRAPPER; exec "`$dir/find-tclsh`" "$dir/autosetup" "$@"