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Operating Systems Linux Gentoo compiling 32 bit application on 64 bit linux(x86_64) Post 302151594 by porter on Sunday 16th of December 2007 01:58:16 PM
Old 12-16-2007
Quote:
Originally Posted by this213
Next, why would you want to create 32-bit objects on a 64-bit platform?
32 bit programs are smaller and faster for programs that don't need more than 2Gig of memory. Most 64 bit processers (DEC Alpha excepted) support both 32bit and 64bit binaries, and most 64 bit operating systems support different memory models simultaneously on a process by process basis.

I've generally found that compilers on 64 bit systems build 32 bit code by default and require additional switches to produce 64 bit code. The linkers are normally able to work out what memory model the code is and will reject attempts to link code with differing models.
 

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platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME
platform::shell - System identification support code and utilities SYNOPSIS
package require platform::shell ?1.1.4? platform::shell::generic shell platform::shell::identify shell platform::shell::platform shell _________________________________________________________________ DESCRIPTION
The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell. This package allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only requirement is that the other shell (identified by its path), is actually executable on the current machine. While for most platform this means that the architecture of the interrogated shell is identical to the architecture of the running shell this is not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run 32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers. For applications like a code repository it is important to identify the architecture of the shell which will actually run the installed packages, versus the architecture of the shell running the repository software. COMMANDS
platform::shell::identify shell This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell. platform::shell::generic shell This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell. platform::shell::platform shell This command returns the contents of tcl_platform(platform) for the specified Tcl shell. KEYWORDS
operating system, cpu architecture, platform, architecture platform::shell 1.1.4 platform::shell(n)
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