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To: cygwin AT cygwin DOT com
From: Sam Steingold <sds AT gnu DOT org>
Subject: Re: crash on the first statement in main()
Date: 08 Jul 2003 18:43:14 -0400
Organization: disorganization
Lines: 45
Message-ID: <uk7as63nh.fsf@gnu.org>
References: <ubrwtwvmi DOT fsf AT gnu DOT org>
Reply-To: sds AT gnu DOT org
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X-Disclaimer: You should not expect anyone to agree with me.
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> * In message <ubrwtwvmi DOT fsf AT gnu DOT org>
> * On the subject of "crash on the first statement in main()"
> * Sent on 19 Jun 2003 18:27:49 -0400
> * I write:
>
> I get a segfault on the first executable line in main() (confirmed in
> the debugger), both when produced by cygwin:
> 
> gcc -W -Wswitch -Wcomment -Wpointer-arith -Wimplicit -Wreturn-type
>  -Wno-sign-compare -falign-functions=4 -g -DDEBUG_OS_ERROR -DDEBUG_SPVW
>  -DSAFETY=3 -DUNICODE -DEXPORT_SYSCALLS -DDIR_KEY -DDYNAMIC_FFI
>  -DNO_SIGSEGV -I. -x none modules.o regexp.o regexi.o regex.o lisp.a
>  -lintl libcharset.a libavcall.a libcallback.a -lreadline -lncurses
>  -liconv -lm -o lisp.exe
> ...
> full/lisp.exe -B . -M base/lispinit.mem -norc -q -i regexp/regexp
>  -x (saveinitmem "full/lispinit.mem") 
> Signal 11
> make: *** [full] Error 1
> 
> and mingw:
> 
> gcc -mno-cygwin -W -Wswitch -Wcomment -Wpointer-arith -Wimplicit
>  -Wreturn-type -falign-functions=4 -D_WIN32 -g -DDEBUG_OS_ERROR
>  -DDEBUG_SPVW -DSAFETY=3 -DUNICODE -DEXPORT_SYSCALLS -DDIR_KEY
>  -DDYNAMIC_FFI -DNO_GETTEXT -DNO_SIGSEGV -I. -x none modules.o regexp.o
>  regexi.o regex.o lisp.a libcharset.a libavcall.a libcallback.a -luser32
>  -lws2_32 -lole32 -luuid -o lisp.exe 
> full/lisp.exe -B . -M base/lispinit.mem -norc -q -i regexp/regexp
>  -x (saveinitmem "full/lispinit.mem")
> <win32 crash dialog box>
> 
> the lines don't do anything special, in fact, "p <the offending line>"
> executes just fine in gdb right after the crash.

I forgot a crucial piece of information:

the segfault happens only with "-g"!
when I compile with "-O2", it works like a charm.

-- 
Sam Steingold (http://www.podval.org/~sds) running w2k
<http://www.camera.org> <http://www.iris.org.il> <http://www.memri.org/>
<http://www.mideasttruth.com/> <http://www.palestine-central.com/links.html>
Daddy, what does "format disk c: complete" mean?


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