Weird debugging problems
Jeremy Penner
I'm having trouble with the -g option. I use:
gcc leveled.c -g leveled.exe tilelib.o sprite.o -lalleg
and it spews out page after page of "multiple definitions" for every
function I use. Here's a sample:
leveled.exe(.text+0x1d8):crt0.s: multiple definition of `__exit'
c:/djgpp/lib\crt0.o(.text+0x1d8):crt0.s: first defined here
leveled.exe(.text+0x2c0):crt0.s: multiple definition of `__sbrk'
c:/djgpp/lib\crt0.o(.text+0x2c0):crt0.s: first defined here
leveled.exe(.text+0x4a4):crt0.s: multiple definition of
`_crt0_init_mcount'
c:/djgpp/lib\crt0.o(.text+0x4a4):crt0.s: first defined here
leveled.exe(.text+0x1304):crt0.s: multiple definition of `put_tile'
c:/djgpp/tmp\ccdaaaaa:leveled.c:144: first defined here
leveled.exe(.text+0x2d8):crt0.s: multiple definition of `__brk'
c:/djgpp/lib\crt0.o(.text+0x2d8):crt0.s: first defined here
leveled.exe(.text+0x4b0):crt0.s: multiple definition of
`update_screen'
c:/djgpp/tmp\ccdaaaaa:leveled.c:32: first defined here
leveled.exe(.text+0x0):crt0.s: multiple definition of `start'
c:/djgpp/lib\crt0.o(.text+0x0):crt0.s: first defined here
leveled.exe(.text+0x1470):crt0.s: multiple definition of `main'
c:/djgpp/tmp\ccdaaaaa:leveled.c:158: first defined here
This goes on for a while. Can anyone help me?
--Jeremy Penner
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Robert Hoehne
Jeremy Penner wrote:
>
> gcc leveled.c -g leveled.exe tilelib.o sprite.o -lalleg
> This goes on for a while. Can anyone help me?
Simply insert a '-o' switch in the commandline above
before the output file, otherwise gcc links leveled.exe
in you program. That means your commandline should look:
gcc leveled.c -g -o leveled.exe tilelib.o sprite.o -lalleg
Robert
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Eli Zaretskii
On Tue, 12 Aug 1997, Jeremy Penner wrote:
> I'm having trouble with the -g option. I use:
> gcc leveled.c -g leveled.exe tilelib.o sprite.o -lalleg
> and it spews out page after page of "multiple definitions" for every
> function I use. Here's a sample:
It's a cockpit error. You need to say this:
gcc leveled.c -g -o leveled.exe tilelib.o sprite.o -lalleg
In other words, -g does not come INSTEAD of -o, it comes IN ADDITION to
it. You still have to say -o leveled.exe.
George Foot
On Tue, 12 Aug 1997 23:42:55 GMT, pzp...@freenet.mb.ca (Jeremy Penner)
wrote:
>I'm having trouble with the -g option. I use:
>gcc leveled.c -g leveled.exe tilelib.o sprite.o -lalleg
The -g option means to include extra debugging information. So your
command above is compiling leveled.c, and then linking the result with
leveled.exe, tilelib.o, sprite.o and the Allegro library. Linking one
eecutable into another doesn't make much sense :)
I think you are confusing -g with -o. -o makes the output go to the
next filename on the command line, rather than to the default (a.exe
and a.out in this case).
Alexis Roda
Jeremy Penner wrote:
>
> I'm having trouble with the -g option. I use:
> gcc leveled.c -g leveled.exe tilelib.o sprite.o -lalleg
> function I use. Here's a sample:
Try
gcc -o leveled.exe -g leveled.c titlelib.o sprite.o -lalleg
it seems gcc is taking laveled.exe as an object file to link with rather
tan the output file, and it complains about multiple definition of
everything. I've just testet it with a simple hello_world-like program:
bash$ gcc linea.c -g linea.exe
linea.exe(.text+0x1d8):crt0.s: multiple definition of `__exit'
e:/gcc/lib\crt0.o(.text+0x1d8):crt0.s: first defined here
linea.exe(.text+0x2c0):crt0.s: multiple definition of `__sbrk'
e:/gcc/lib\crt0.o(.text+0x2c0):crt0.s: first defined here
linea.exe(.text+0x4a4):crt0.s: multiple definition of
`_crt0_init_mcount'
e:/gcc/lib\crt0.o(.text+0x4a4):crt0.s: first defined here
linea.exe(.text+0x2d8):crt0.s: multiple definition of `__brk'
e:/gcc/lib\crt0.o(.text+0x2d8):crt0.s: first defined here
linea.exe(.text+0x0):crt0.s: multiple definition of `start'
e:/gcc/lib\crt0.o(.text+0x0):crt0.s: first defined here
linea.exe(.text+0x4c4):crt0.s: multiple definition of `main'
e:/gcc/tmp\ccdaaaaa:linea.c:4: first defined here
while gcc -o linea.exe -g linea.c works fine.
Hope this helps.
Saludos
Alexis Roda