ld: library not found for -lcrt0.o

Question

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

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Answer 1

Mar 20, 2009 7:34 AM in response to ericmeyers

This is a good idea--I think I should do this. I think there is a variable named $MACHTYPE that I could use. Do you know a another way or ways to probe the architecture of a machine from a command line and/or makefile?

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Answer 2

Mar 20, 2009 7:35 AM in response to ericmeyers

This seems odd to me. I thought the reason people originally developed dynamic linking was because of hardware limitations, i.e. to save space on disks and memory etc... Now that machines have literally gibabytes of memory, why would anyone want to compile in anyway other than static?

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Answer 3

ericmeyers

Level 4

1,410 points

Mar 20, 2009 3:28 PM in response to Sean McGuffee

Easy. In your Makefile just do something like this ...


UNAME := $(shell uname)
ifneq ($(UNAME),Darwin)
CFLAGS := $(CFLAGS) -static 
endif

Eric

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Answer 4

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

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Answer 5

Mar 20, 2009 10:58 PM in response to Sean McGuffee

VMware Fusion ($60) with an Ubuntu virtual machine?

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Answer 6

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.

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Answer 7

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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Answer 8

ericmeyers

Level 4

1,410 points

Mar 24, 2009 3:03 PM in response to Sean McGuffee

That's not what I said. I was comparing static and dynamic libraries. You shouldn't be linking runtimes from gcc against code compiled with icc.

The fact icc produces more efficient code than gcc doesn't suprise me (and if it didn't icc would be a complete waste of money).

Why Intel doesn't provided both static and dynamic runtimes is beyond me.

I'm just telling you from experience 99.9% of folks don't link statically against language runtimes (even on Windows.)

Eric

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