[SOLVED] Trouble compiling C program on Fedora 20 64-bit system

Hello all!

I have been all over the internet on this, and have merely become more confused!

First off, I am using Fedora 20, 64-bit, with the current kernel version being 3.16.6-200.fc20.x86_64,
and the gcc version I have installed is gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-7), which I installed using:
>sudo yum groupinstall "Development Tools"

When I try to compile a REALY SIMPLE C program, like the following:

/* Simple.c */
    
int main()
{
  return 0;
}

using the command:
>gcc Simple.c -o Simple

I get the following error messages:

/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.8.3/../../../libc.so when searching for -lc
/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-redhat-linux/4.8.3/../../../libc.a when searching for -lc
/bin/ld: skipping incompatible /lib/libc.so when searching for -lc
/bin/ld: skipping incompatible /lib/libc.a when searching for -lc
/bin/ld: skipping incompatible /usr/lib/libc.so when searching for -lc
/bin/ld: skipping incompatible /usr/lib/libc.a when searching for -lc
/bin/ld: cannot find -lc
collect2: error: ld returned 1 exit status

I believe I installed the development tools correctly (but have I?); I have also installed the
kernel-devel package upon a suggestion from an internet post...

I believe that this error message is telling me that the C / C++ library libc is not the correct version (or, more literally, an incompatible version) of that library? How can this be? How can it have occurred?

I am in desperate need of some assistance here!

If you require any other info. to help you resolve this issue, please let me know! I just can't figure this out!

Thanks in advance,

ZT.

It sounds like you have something installed that should not be there. What do you get from:

rpm -qf /lib/libc.so

On a 64-bit system, your libraries should be under /lib64.

Works OK here, Fedora 20 - 64 : $ gcc Simple.c -o Simple

Both glibc-devel´s are installed : glibc-devel.x86_64, glibc-devel.i686,
and gcc finds the right `libc.so', from /usr/lib64/.
( /lib64/ is a link to /usr/lib64/ ).

-

Ok, I took your suggestion smallpond, and typed:
> rpm -qf /lib/libc.so

and I got the following:

glibc-devel-2.18-16.fc20.i686

Now what the heck does THAT mean? The version doesn't look right, but what's the "devel" all about?

This just isn't logical; I just freshly installed this system about a month ago, and I can't imaging what could have installed a seperate version of glibc...

All things considered, what would YOU do next to resolve this (almost laughable) situation? I have never encountered a similiar problem before! Why didn't yum complain when I installed gcc? 'Cause isn't this a DIFFERENT VERSION's library (or am I misunderstanding something?).

Should I simply try removing this package? Will that even work now?

Wow, this is some messed up stuff :-{

Anyways, thanks for responding to the post!

ZT.

Thanks to both you guys!

Using info. I extrapolated from both of your responses, I began to look into my /lib and /lib64 folders; I discoved that, although /lib indeed DID have a "libc.so" link, /lib64 DID NOT! Both of these folders did, however, have a file named "glibc-2.18.so" (which I now gather is the CORRECT library version? Who knew :-{ . This prompted me to do a little research on how and what "libc.so" actually is.

Through this further research I realized that, potentially, I had ONLY the glibc-devel.i686 package installed! I then ran:

> sudo yum install glibc-devel

and that solved the problem! I guess that simply using:

> sudo yum groupinstall "Development Tools"

is NOT all that's required in order to compile using gcc on 64-bit Fedora systems!

Thanks for all your help, gentlemen!

ZT.

> sudo yum groupinstall "Development Tools" is NOT all that's required in order to compile using gcc

No. The first requirement is : # yum install gcc-c++
.. which will also install the packages that make gcc work :
{ glibc-devel.x86_64, glibc-headers, kernel-headers }.