2 # ### ### ### ######### ######### #########
5 # Heuristics to assemble a platform identifier from publicly available
6 # information. The identifier describes the platform of the currently
7 # running tcl shell. This is a mixture of the runtime environment and
8 # of build-time properties of the executable itself.
11 # <1> A tcl shell executing on a x86_64 processor, but having a
12 # wordsize of 4 was compiled for the x86 environment, i.e. 32
13 # bit, and loaded packages have to match that, and not the
16 # <2> The hp/solaris 32/64 bit builds of the core cannot be
17 # distinguished by looking at tcl_platform. As packages have to
18 # match the 32/64 information we have to look in more places. In
19 # this case we inspect the executable itself (magic numbers,
20 # i.e. fileutil::magic::filetype).
22 # The basic information used comes out of the 'os' and 'machine'
23 # entries of the 'tcl_platform' array. A number of general and
24 # os/machine specific transformation are applied to get a canonical
28 # Only the first element of 'os' is used - we don't care whether we
29 # are on "Windows NT" or "Windows XP" or whatever.
37 # % x86_64 + wordSize 4 => x86 code
40 # % AIX are always powerpc machines
41 # % HP-UX 9000/800 etc means parisc
42 # % linux has to take glibc version into account
43 # % sunos -> solaris, and keep version number
45 # NOTE: A platform like linux glibc 2.3, which can use glibc 2.2 stuff
46 # has to provide all possible allowed platform identifiers when
47 # searching search. Ditto a solaris 2.8 platform can use solaris 2.6
48 # packages. Etc. This is handled by the other procedure, see below.
50 # ### ### ### ######### ######### #########
53 namespace eval ::platform {}
55 # ### ### ### ######### ######### #########
58 # -- platform::generic
60 # Assembles an identifier for the generic platform. It leaves out
61 # details like kernel version, libc version, etc.
63 proc ::platform::generic {} {
66 set plat [string tolower [lindex $tcl_platform(os) 0]]
67 set cpu $tcl_platform(machine)
69 switch -glob -- $cpu {
78 if {$tcl_platform(wordSize) == 4} {
79 # See Example <1> at the top of this file.
90 if {$tcl_platform(wordSize) == 4} {
99 if {$cpu eq "amd64"} {
100 # Do not check wordSize, win32-x64 is an IL32P64 platform.
106 if {[string match "ix86" $cpu]} {
107 if {$tcl_platform(wordSize) == 8} {
110 } elseif {![string match "ia64*" $cpu]} {
112 if {$tcl_platform(wordSize) == 8} {
119 # Correctly identify the cpu when running as a 64bit
120 # process on a machine with a 32bit kernel
121 if {$cpu eq "ix86"} {
122 if {$tcl_platform(wordSize) == 8} {
129 if {$tcl_platform(wordSize) == 8} {
135 if {![string match "ia64*" $cpu]} {
137 if {$tcl_platform(wordSize) == 8} {
147 return "${plat}-${cpu}"
150 # -- platform::identify
152 # Assembles an identifier for the exact platform, by extending the
153 # generic identifier. I.e. it adds in details like kernel version,
154 # libc version, etc., if they are relevant for the loading of
155 # packages on the platform.
157 proc ::platform::identify {} {
161 regexp {^([^-]+)-([^-]+)$} $id -> plat cpu
165 regsub {^5} $tcl_platform(osVersion) 2 text
167 return "${plat}-${cpu}"
170 set major [lindex [split $tcl_platform(osVersion) .] 0]
173 append plat 10.$major
174 return "${plat}-${cpu}"
178 # Look for the libc*.so and determine its version
179 # (libc5/6, libc6 further glibc 2.X)
183 # Determine in which directory to look. /lib, or /lib64.
184 # For that we use the tcl_platform(wordSize).
186 # We could use the 'cpu' info, per the equivalence below,
187 # that however would be restricted to intel. And this may
188 # be a arm, mips, etc. system. The wordsize is more
191 # ix86 <=> (wordSize == 4) <=> 32 bit ==> /lib
192 # x86_64 <=> (wordSize == 8) <=> 64 bit ==> /lib64
194 # Do not look into /lib64 even if present, if the cpu
197 switch -exact -- $tcl_platform(wordSize) {
205 return -code error "Bad wordSize $tcl_platform(wordSize), expected 4 or 8"
209 set libclist [lsort [glob -nocomplain -directory $base libc*]]
210 if {[llength $libclist]} {
211 set libc [lindex $libclist 0]
213 # Try executing the library first. This should suceed
214 # for a glibc library, and return the version
218 set vdata [lindex [split [exec $libc] \n] 0]
220 regexp {([0-9]+(\.[0-9]+)*)} $vdata -> v
221 foreach {major minor} [split $v .] break
222 set v glibc${major}.${minor}
224 # We had trouble executing the library. We are now
225 # inspecting its name to determine the version
226 # number. This code by Larry McVoy.
228 if {[regexp -- {libc-([0-9]+)\.([0-9]+)} $libc -> major minor]} {
229 set v glibc${major}.${minor}
234 return "${plat}-${cpu}"
241 # -- platform::patterns
243 # Given an exact platform identifier, i.e. _not_ the generic
244 # identifier it assembles a list of exact platform identifier
245 # describing platform which should be compatible with the
248 # I.e. packages for all platforms in the result list should be
249 # loadable on the specified platform.
251 # << Should we add the generic identifier to the list as well ? In
252 # general it is not compatible I believe. So better not. In many
253 # cases the exact identifier is identical to the generic one
257 proc ::platform::patterns {id} {
259 if {$id eq "tcl"} {return $res}
261 switch -glob -- $id {
263 if {[regexp {solaris([^-]*)-(.*)} $id -> v cpu]} {
264 if {$v eq ""} {return $id}
265 foreach {major minor} [split $v .] break
267 for {set j $minor} {$j >= 6} {incr j -1} {
268 lappend res solaris${major}.${j}-${cpu}
273 if {[regexp {linux-glibc([^-]*)-(.*)} $id -> v cpu]} {
274 foreach {major minor} [split $v .] break
276 for {set j $minor} {$j >= 0} {incr j -1} {
277 lappend res linux-glibc${major}.${j}-${cpu}
283 if {[regexp {macosx([^-]*)-(.*)} $id -> v cpu]} {
285 switch -exact -- $cpu {
287 x86_64 { set alt i386-x86_64 }
288 default { set alt {} }
292 foreach {major minor} [split $v .] break
294 # Add 10.5 to 10.minor to patterns.
296 for {set j $minor} {$j >= 5} {incr j -1} {
297 lappend res macosx${major}.${j}-${cpu}
298 lappend res macosx${major}.${j}-universal
300 lappend res macosx${major}.${j}-$alt
304 # Add unversioned patterns for 10.3/10.4 builds.
305 lappend res macosx-${cpu}
306 lappend res macosx-universal
308 lappend res macosx-$alt
311 lappend res macosx-universal
313 lappend res macosx-$alt
317 lappend res macosx-universal
321 lappend res macosx-universal
325 lappend res macosx-universal macosx-i386-x86_64
328 lappend res tcl ; # Pure tcl packages are always compatible.
333 # ### ### ### ######### ######### #########
336 package provide platform 1.0.9
338 # ### ### ### ######### ######### #########
341 if {[info exists argv0] && ($argv0 eq [info script])} {
342 puts ====================================
344 puts ====================================
345 puts Generic\ identification:\ [::platform::generic]
346 puts Exact\ identification:\ \ \ [::platform::identify]
347 puts ====================================
348 puts Search\ patterns:
349 puts *\ [join [::platform::patterns [::platform::identify]] \n*\ ]
350 puts ====================================