ld: library not found for -lcrt0.o

Hi, I'm doing research at Memorial Sloan-Kettering Cancer Center, and I am trying to compile some c code with an intel compiler and a -static flag. I'm getting an error:
ld: library not found for -lcrt0.o
Does anyone know how to fix this?
Thanks, it's holding up my research!
Sean

iMac 24 inch, Mac OS X (10.5.5)

Posted on Mar 18, 2009 10:34 AM

Top-ranking reply

RayNewbie

Level 5

6,810 points

Posted on Mar 18, 2009 3:01 PM

crt0.o looks like the startup module, which is system dependent. In other words you are trying to port your program from one system to another, and the target system probably uses a different startup module.

Your first try is to remove -lcrt0.o from the build command line and let the system link to its default startup code. However be aware that porting code is not usually a job for a beginner, and the absence of crt0.o may be only the start of the problems you'll need to solve.

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23 replies

ericmeyers

Level 4

1,410 points

Mar 20, 2009 3:33 PM in response to Sean McGuffee

Because if the language vendor makes changes/fixes to the runtime your app won't feel it if it's compiled statically.

And I'm not convinced there is any significant difference in speed using the dynamic runtime, except for the initial loading of it.

Eric

Mar 24, 2009 9:27 AM in response to ericmeyers

Well, I don't see how it could be as efficient as possible if it is using some code that was compiled with gcc instead of icc. I mean, I notice at least a 3 fold increase in speed by compiling with icc. Why should the libraries my program links with be compiled with gcc instead of icc? Maybe they aren't used much, but in principle, it makes sense to let them be compiled by icc.

Mar 19, 2009 7:40 AM in response to RayNewbie

I'm not sure how to remove the -lcrt0.o from the build command line. icc is putting it in for me.

Mar 19, 2009 7:43 AM in response to ericmeyers

I'm not sure why Mac OS X does not include all libraries (including libgcc.a libSystem.dylib and crt0.o) that have been compiled with -static. Am I wrong that static programs always run faster?

orangekay

Level 5

4,085 points

Mar 19, 2009 7:55 AM in response to Sean McGuffee

Sean McGuffee wrote:
Am I wrong that static programs always run faster?

Probably.

Mar 19, 2009 2:20 PM in response to orangekay

It would be nice to work on the linux machines, but the workstation they give me is a mac.

ericmeyers

Level 4

1,410 points

Mar 19, 2009 3:26 PM in response to Sean McGuffee

Actually statically linking a language runtime (which is what we're really talking about here) is rare. Most people never do it.

Eric

Mar 24, 2009 9:30 AM in response to esoterica

Good idea. I think I will have to install some linux on the virtual machine capability of mac! Wow, mac's really have become so useful!

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ld: library not found for -lcrt0.o