DOKK / manpages / debian 10 / tcl8.6-doc / platform.3tcl.en
platform(3tcl) Tcl Bundled Packages platform(3tcl) 







platform - System identification support code and utilities








package require platform ?1.0.10?

platform::generic
platform::identify
platform::patterns identifier










The platform package provides several utility commands
    useful for the identification of the architecture of a machine running
  Tcl.


Whilst Tcl provides the tcl_platform array for identifying
    the current architecture (in particular, the platform and machine elements)
    this is not always sufficient. This is because (on Unix machines)
    tcl_platform reflects the values returned by the uname command
    and these are not standardized across platforms and architectures. In
    addition, on at least one platform (AIX) the tcl_platform(machine)
    contains the CPU serial number.


Consequently, individual applications need to manipulate the
    values in tcl_platform (along with the output of system specific
    utilities) - which is both inconvenient for developers, and introduces the
    potential for inconsistencies in identifying architectures and in naming
    conventions.


The platform package prevents such fragmentation - i.e., it
    establishes a standard naming convention for architectures running Tcl and
    makes it more convenient for developers to identify the current architecture
    a Tcl program is running on.









  

  
This command returns an identifier describing the platform the Tcl core is
      running on. The returned identifier has the general format
      OS-CPU. The OS part of the identifier may contain
      details like kernel version, libc version, etc., and this information may
      contain dashes as well. The CPU part will not contain dashes,
      making the preceding dash the last dash in the result.

  

  
This command returns a simplified identifier describing the platform the
      Tcl core is running on. In contrast to platform::identify it leaves
      out details like kernel version, libc version, etc. The returned
      identifier has the general format OS-CPU.

  

  
This command takes an identifier as returned by platform::identify
      and returns a list of identifiers describing compatible
    architectures.










This can be used to allow an application to be shipped with
    multiple builds of a shared library, so that the same package works on many
    versions of an operating system. For example:






package require platform
# Assume that app script is .../theapp/bin/theapp.tcl
set binDir [file dirname [file normalize [info script]]]
set libDir [file join $binDir .. lib]
set platLibDir [file join $libDir [platform::identify]]
load [file join $platLibDir support[info sharedlibextension]]










operating system, cpu architecture, platform, architecture







  

    1.0.4
    platform