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 {$cpu ne "ia64"} {
107 if {$tcl_platform(wordSize) == 8} {
117 if {$tcl_platform(wordSize) == 8} {
123 if {$cpu ne "ia64"} {
125 if {$tcl_platform(wordSize) == 8} {
135 return "${plat}-${cpu}"
138 # -- platform::identify
140 # Assembles an identifier for the exact platform, by extending the
141 # generic identifier. I.e. it adds in details like kernel version,
142 # libc version, etc., if they are relevant for the loading of
143 # packages on the platform.
145 proc ::platform::identify {} {
149 regexp {^([^-]+)-([^-]+)$} $id -> plat cpu
153 regsub {^5} $tcl_platform(osVersion) 2 text
155 return "${plat}-${cpu}"
158 # Look for the libc*.so and determine its version
159 # (libc5/6, libc6 further glibc 2.X)
163 if {[file exists /lib64] && [file isdirectory /lib64]} {
169 set libclist [lsort [glob -nocomplain -directory $base libc*]]
170 if {[llength $libclist]} {
171 set libc [lindex $libclist 0]
173 # Try executing the library first. This should suceed
174 # for a glibc library, and return the version
178 set vdata [lindex [split [exec $libc] \n] 0]
180 regexp {([0-9]+(\.[0-9]+)*)} $vdata -> v
181 foreach {major minor} [split $v .] break
182 set v glibc${major}.${minor}
184 # We had trouble executing the library. We are now
185 # inspecting its name to determine the version
186 # number. This code by Larry McVoy.
188 if {[regexp -- {libc-([0-9]+)\.([0-9]+)} $libc -> major minor]} {
189 set v glibc${major}.${minor}
194 return "${plat}-${cpu}"
201 # -- platform::patterns
203 # Given an exact platform identifier, i.e. _not_ the generic
204 # identifier it assembles a list of exact platform identifier
205 # describing platform which should be compatible with the
208 # I.e. packages for all platforms in the result list should be
209 # loadable on the specified platform.
211 # << Should we add the generic identifier to the list as well ? In
212 # general it is not compatible I believe. So better not. In many
213 # cases the exact identifier is identical to the generic one
217 proc ::platform::patterns {id} {
219 if {$id eq "tcl"} {return $res}
221 switch -glob -- $id {
223 if {[regexp {solaris([^-]*)-(.*)} $id -> v cpu]} {
224 if {$v eq ""} {return $id}
225 foreach {major minor} [split $v .] break
227 for {set j $minor} {$j >= 6} {incr j -1} {
228 lappend res solaris${major}.${j}-${cpu}
233 if {[regexp {linux-glibc([^-]*)-(.*)} $id -> v cpu]} {
234 foreach {major minor} [split $v .] break
236 for {set j $minor} {$j >= 0} {incr j -1} {
237 lappend res linux-glibc${major}.${j}-${cpu}
243 lappend res macosx-universal
246 lappend res tcl ; # Pure tcl packages are always compatible.
251 # ### ### ### ######### ######### #########
254 package provide platform 1.0.3
256 # ### ### ### ######### ######### #########
259 if {[info exists argv0] && ($argv0 eq [info script])} {
260 puts ====================================
262 puts ====================================
263 puts Generic\ identification:\ [::platform::generic]
264 puts Exact\ identification:\ \ \ [::platform::identify]
265 puts ====================================
266 puts Search\ patterns:
267 puts *\ [join [::platform::patterns [::platform::identify]] \n*\ ]
268 puts ====================================