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flat assembler > Linux > Linker error with libcdemo

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dstyl



Joined: 23 Jul 2015
Posts: 31
Linker error with libcdemo
Im trying to link the example libcdemo.o but i get the following error

Code:
gcc libcdemo.o -o libcdemo
/usr/bin/ldi386 architecture of input file `libcdemo.o' is incompatible with i386:x86-64 output
collect2errorld returned 1 exit status



Does anyone know the reason?
Thx in advance
Post 03 Aug 2016, 09:39
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JohnFound



Joined: 16 Jun 2003
Posts: 3415
Location: Bulgaria
Probably you are trying to link 32bit executable with 64bit linker. There should be some magic options to switch the target CPU.
Also, imho for assembly language programs it is better to use directly the linker ld, instead of the C++ compiler gcc.
Post 03 Aug 2016, 10:12
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dstyl



Joined: 23 Jul 2015
Posts: 31

JohnFound wrote:
Probably you are trying to link 32bit executable with 64bit linker. There should be some magic options to switch the target CPU.
Also, imho for assembly language programs it is better to use directly the linker ld, instead of the C++ compiler gcc.


Can you please post the cmd for ld, would help me a lot and thanks for your answer.
Post 03 Aug 2016, 12:53
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JohnFound



Joined: 16 Jun 2003
Posts: 3415
Location: Bulgaria
I am using FASM to generate directly the executable files and hate the linkers since my childhood. Very Happy So, maybe someone else will be able to help you.
Post 03 Aug 2016, 12:57
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Melissa



Joined: 12 Apr 2012
Posts: 26
try gcc -m32 ...
Post 04 Aug 2016, 23:56
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dstyl



Joined: 23 Jul 2015
Posts: 31
I get
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: cannot find -lgcc_s
collect2: error: ld returned 1 exit status
from
gcc -m32 libcdemo.o -o libcdemo
Post 05 Aug 2016, 08:07
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redsock



Joined: 09 Oct 2009
Posts: 244
Location: Australia
FYI, depending on your linux distro and whatever package manager you use, there are 32bit compat goods that are needed. I happily run openSUSE Leap, and using its package manager, if I search for gcc I see the following tidbits that would fix your -lgcc:

i | libgcc_s1-32bit | C compiler runtime library | package

There are likely other similar 32bit library requirements but that is the one your output is complaining about.
Post 05 Aug 2016, 08:45
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dstyl



Joined: 23 Jul 2015
Posts: 31
I have libgcc4.9 installed, it still searches for lgcc, i have linux mint as distro.
I get the same problem with nasm and ld -s -o xy xy.o
Post 05 Aug 2016, 09:02
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Endre



Joined: 29 Dec 2003
Posts: 208
Location: Budapest, Hungary
What if you install lib32gcc-4.9-dev? I guess it pulls every necessary depending package as well, so don't be scared looking at the list of packages being installed Wink.


Last edited by Endre on 10 Dec 2016, 22:15; edited 1 time in total
Post 05 Aug 2016, 17:48
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system error



Joined: 01 Sep 2013
Posts: 364
I remember this problem. I don't know about Mint, but in Ubuntu you need to install "g++-multilib libc6-dev-i386" before you can use that -m32 switch.
Post 18 Aug 2016, 19:09
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