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Top Forums Programming How Can a Machine Reads a Compiler Since A Compiler is Written in Text! Not Binaries? Post 302257982 by shamrock on Thursday 13th of November 2008 01:37:08 PM
Old 11-13-2008
Quote:
Originally Posted by f.ben.isaac
I still don't get it.....A compiler is binary, so its been executed, so what compiled the compiler! And the compiler compiler's in what language was written?

It is not a big deal, but i just find it hard to take it. Maybe its my problem :-/
The compiler's job is to produce assembly code given C source as input. The output of the compiler is fed to the assembler which translates all assembly code into machine code and finally the link editor sets up all the linkages to external functions.

Compiling the compiler is a process called bootstrapping similar to the way your machine boots up...more on it here.
 

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CONFIG.GUESS(1) 						   User Commands						   CONFIG.GUESS(1)

NAME
config.guess - guess the build system triplet SYNOPSIS
config.guess [OPTION] DESCRIPTION
The GNU build system distinguishes three types of machines, the `build' machine on which the compilers are run, the `host' machine on which the package being built will run, and, exclusively when you build a compiler, assembler etc., the `target' machine, for which the compiler being built will produce code. This script will guess the type of the `build' machine. Output the configuration name of the system `config.guess' is run on. Operation modes: -h, --help print this help, then exit -t, --time-stamp print date of last modification, then exit -v, --version print version number, then exit ENVIRONMENT VARIABLES
config.guess might need to compile and run C code, hence it needs a compiler for the `build' machine: use the environment variable `CC_FOR_BUILD' to specify the compiler for the build machine. If `CC_FOR_BUILD' is not specified, `CC' will be used. Be sure to specify `CC_FOR_BUILD' is `CC' is a cross-compiler to the `host' machine. CC_FOR_BUILD a native C compiler, defaults to `cc' CC a native C compiler, the previous variable is preferred REPORTING BUGS
Report bugs and patches to <config-patches@gnu.org>. Originally written by Per Bothner. Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
autoconf(1), automake(1), autoreconf(1), autoupdate(1), autoheader(1), autoscan(1), config.guess(1), config.sub(1), ifnames(1), libtool(1). config.guess (2005-09-19) September 2005 CONFIG.GUESS(1)
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