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Re: [avr-gcc-list] Problem building avr-gcc on MinGW

From: Joerg Wunsch
Subject: Re: [avr-gcc-list] Problem building avr-gcc on MinGW
Date: Thu, 6 Feb 2003 10:06:31 +0100 (MET)

>I think I am almost through building an AVR cross compiler on MinGW.
>There seems to be only a little problem left.  When linking
>collect2.exe I get unresolved symbols kill, pipe, and fork:

% fgrep kill /junk/avr-gcc/work/gcc-3.3.2002.09.10/gcc/collect2.c
  kill (getpid (), signo);

OK, in that case, you're lucky.  "raise(signo);" should do the same
using only standard C functions.

With pipe() and fork(), things are going to become more difficult.
Under Unix, fork() creates a new process by cloning the current
process 1:1.  (This is the only way to create a new process under
Unix.)  AFAICT, there is no equivalent to this technique on Windows.
The child process is then often set up to execute the image of
a new program in the context of this process.  IMHO, the combined
action of this fork() + exec*() [execve, execvl, ...] is about the
same that DOS/Windows would describe as exec().

Still, you gotta figure out how to establish a pipe between both
J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/

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