C Compiler

C Compiler

[Peter]

Season Greetings!

Trying to install a program I get:

checking for C compiler default output... configure: error: C compiler cannot 
create executables

when doing ./configure in RH9.

How do I correct this error?

Thanks & regards
-- 
Peter







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Re: C Compiler

[Amin]

On Saturday 27 Dec 2003 14:20, Peter wrote:
> checking for C compiler default output... configure: error: C
> compiler cannot create executables

Try searching for this exact phrase, with quotation marks surrounding 
it, on Google.

HTH,
Yawar Amin
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Re: C Compiler

[John Kelly]

On Sat, 27 Dec 2003 16:20:40 +0800
Peter wrote:
> 
> Trying to install a program I get:
> 
> checking for C compiler default output... configure: error: C compiler cannot 
> create executables
> 
> when doing ./configure in RH9.
> 
> How do I correct this error?
 
I can't be of much help here since I stopped using RedHat at version 7.3. However it sounds like 
your C compiler may be broken.
What do you get from the following commands:

rpm -qa | grep gcc
gcc --version

Can you write a hello world program and compile it by hand?

If gcc is installed and working, perhaps the configure script is not finding it. 
Try ./configure --help. You can usually pass ./configure an option to force it to use your gcc. 

Hth.

John 
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Re: C Compiler

[caszonyi]

On Sat, 27 Dec 2003, Peter wrote:

> Season Greetings!
>
> Trying to install a program I get:
>
> checking for C compiler default output... configure: error: C compiler cannot
> create executables
>
> when doing ./configure in RH9.
>
> How do I correct this error?
>

you *must* install gcc and development packages for gcc and glibc


> Thanks & regards
> --
> Peter
>
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Re: C Compiler

[joy]

Peter wrote:

>Season Greetings!
>
>Trying to install a program I get:
>
>checking for C compiler default output... configure: error: C compiler cannot 
>create executables
>
>when doing ./configure in RH9.
>
>How do I correct this error?
>
>Thanks & regards
>  
>
I used to get the same message on my Deb system. I had not installed 
glibc ( I was trying to do everything manually :-) and some other 
packages related to gcc.
reinstall gcc from scratch and you are done.


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setgid: Operation not permitted

[chuck gelm net]

Howdy:

 I broke something on my file server and now I can no longer
'su' (root) remotely.  When I try I get this error:

setgid: Operation not permitted

 Often I logged on remotely and issued

su
cd /hde3 		
chmod -R 775 *
chgrp -R users

So that I could 'rw' the files in that directory
from any of my Windows workstations.
OBTW, ("/hde3" is /dev/hde3).

 What might I have done and how do I fix it?

 The system is an old amd-k6-266 running
Slackware-8.0 kernel 2.4.19 configured as a file server
using nfs and samba.

Happy holidays and new year, Chuck

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Re: setgid: Operation not permitted

[Ray Olszewski]

At 07:51 AM 12/29/2003 -0500, chuck gelm net wrote:
>Howdy:
>
>  I broke something on my file server and now I can no longer
>'su' (root) remotely.  When I try I get this error:
>
>setgid: Operation not permitted
>
>  Often I logged on remotely and issued
>
>su
>cd /hde3
>chmod -R 775 *
>chgrp -R users
>
>So that I could 'rw' the files in that directory
>from any of my Windows workstations.
>OBTW, ("/hde3" is /dev/hde3).
>
>  What might I have done and how do I fix it?
>
>  The system is an old amd-k6-266 running
>Slackware-8.0 kernel 2.4.19 configured as a file server
>using nfs and samba.


"What might I have done" is always a tough question to answer. I'm assuming 
a couple of details that you left out, namely that (a) the message you 
quote occurs right after you enter the root password, with nothing in 
between, and (b) the su then fails, leaving you at whatever userid you were 
at before entering the "su" command. Also that the exact command you enter 
is "su" (not, for example, "su -") and that it is entered at a 
normal-looking command prompt.

I'd check these things:

1. In /etc/passwd, is root still group 0?
2. In /etc/group, is group 0 present and named "root"?
3. Are any relevant filesystems misset to be read-only? (If your system 
even has an hde drive, it is unusual in some respect.)
4. Did anything odd get changed in /etc/login.defs?
5. Did anything odd get added to root's profile (/root/.profile, I think)?
6. Did you do any update to the system recently that might have introduced 
a library mismatch with su? (I'm not sure which library has the setgid() 
call, but glibc is likely.)

Finally, have you tried a console login and su? If not, you should, to 
detemine if the problem is connected with the remote aspect of the process. 
If it is, you need to provide more detail about it ... telnet, ssh, rsh, or 
what, for example? Might there be restrictions on what the system will 
permit that login method to do? You mention that the system runs nfs and 
samba ... do they play any obvious role in what you are doing (e.g., is 
either relevant home directory an nfs share)?



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Re: setgid: Operation not permitted

[chuck gelm net]

Thanks, Ray:

 I'll fill in some of the details that I left out.

* 'su' on the console works normally. See session below.

I am not familiar with 'su -'.  :-|

It is a telnet session from a windows workstation:
-------------------------------------------------
server login: gelmce
Password:
Linux 2.4.19.
Last login: Mon Dec 29 14:02:26 -0500 2003 on pts/0 from web.
No mail.
 
Pause for storage relocation.
 
gelmce@server:~$ su root
Password:
setgid: Operation not permitted
gelmce@server:~$ whoami
gelmce
-------------------------------------------------
I've not noticed that "Pause for storage relocation."
message before.  I wonder what it means.

> 3. Are any relevant filesystems misset to be read-only? (If your system
> even has an hde drive, it is unusual in some respect.)

 Yes.  I have a Maxtor (Promise) ATA-U100 add on IDE card.
It controls /dev/hde,f,g,h.

/dev/hda1 is mounted as '/'
/dev/hda3 is mounted as '/usr'

 These are the only 'system' mounts, so /home/gelmce is on /dev/hda1.

>     (e.g., is
> either relevant home directory an nfs share)?

 No. All (both) shares are separate file systems and are
mounted from rc.local.

 This is all I can answer so far.  I'll try your suggestions
and return.

Many thanks, Chuck

> 
Ray Olszewski wrote:
> 
> At 07:51 AM 12/29/2003 -0500, chuck gelm net wrote:
> >Howdy:
> >
> >  I broke something on my file server and now I can no longer
> >'su' (root) remotely.  When I try I get this error:
> >
> >setgid: Operation not permitted
> >
> >  Often I logged on remotely and issued
> >
> >su
> >cd /hde3
> >chmod -R 775 *
> >chgrp -R users
> >
> >So that I could 'rw' the files in that directory
> >from any of my Windows workstations.
> >OBTW, ("/hde3" is /dev/hde3).
> >
> >  What might I have done and how do I fix it?
> >
> >  The system is an old amd-k6-266 running
> >Slackware-8.0 kernel 2.4.19 configured as a file server
> >using nfs and samba.
> 
> "What might I have done" is always a tough question to answer. I'm assuming
> a couple of details that you left out, namely that (a) the message you
> quote occurs right after you enter the root password, with nothing in
> between, and (b) the su then fails, leaving you at whatever userid you were
> at before entering the "su" command. Also that the exact command you enter
> is "su" (not, for example, "su -") and that it is entered at a
> normal-looking command prompt.
> 
> I'd check these things:
> 
> 1. In /etc/passwd, is root still group 0?
> 2. In /etc/group, is group 0 present and named "root"?
> 3. Are any relevant filesystems misset to be read-only? (If your system
> even has an hde drive, it is unusual in some respect.)
> 4. Did anything odd get changed in /etc/login.defs?
> 5. Did anything odd get added to root's profile (/root/.profile, I think)?
> 6. Did you do any update to the system recently that might have introduced
> a library mismatch with su? (I'm not sure which library has the setgid()
> call, but glibc is likely.)
> 
> Finally, have you tried a console login and su? If not, you should, to
> detemine if the problem is connected with the remote aspect of the process.
> If it is, you need to provide more detail about it ... telnet, ssh, rsh, or
> what, for example? Might there be restrictions on what the system will
> permit that login method to do? You mention that the system runs nfs and
> samba ... do they play any obvious role in what you are doing (e.g., is
> either relevant home directory an nfs share)?

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Re: setgid: Operation not permitted

[caszonyi]

On Mon, 29 Dec 2003, chuck gelm net wrote:

> Howdy:
>
>  I broke something on my file server and now I can no longer
> 'su' (root) remotely.  When I try I get this error:
>
> setgid: Operation not permitted
>

su must be setuid root to operate
you must issue the following command as root:
chmod 4755 /bin/su

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Re: setgid: Operation not permitted

[chuck gelm net]

We found it.

Thanks, Ray & caszonyi.

 I think I accidentally issued this command

chmod -R 775 *

 while in the directory /bin instead of
in the directory /hde3, because 'ls -l su' returned
-rwxrwxr-x root root su  on the file server, while I get
-rws--x--x root root su  on the web server (kernel-2.2.19).

 I then cd'd to /bin and issued

chmod 4711 su

 Now 'ls -l su' returns

-rws--x--x root root su

 and I can now logon remotely and 'su root'.

:-)

 Now, I suppose that I have many files in /bin incorrectly set to 
-rwxrwxr-x instead of
-rws--x--x or whatever they should be.

:-|

Regards, Chuck

Ray Olszewski wrote:
> 
> At 07:51 AM 12/29/2003 -0500, chuck gelm net wrote:
> >Howdy:
> >
> >  I broke something on my file server and now I can no longer
> >'su' (root) remotely.  When I try I get this error:
> >
> >setgid: Operation not permitted
> >
> >  Often I logged on remotely and issued
> >
> >su
> >cd /hde3
> >chmod -R 775 *
> >chgrp -R users
<snip>

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Re: setgid: Operation not permitted

[Jos Lemmerling]

On Mon, 29 Dec 2003, chuck gelm net wrote:

> I am not familiar with 'su -'.  :-|

From the manpage of "su":

If the first argument to su is a dash (-), the environment will be 
changed to what would be expected if the user actually logged in
as the specified user. Otherwise, the environment is passed along,
with the exception of $PATH, which  is controlled  by PATH and SUPATH in
/etc/default/su. Additionally, the user's project ID is set if the dash
argument is present. See settaskid(2).


In most cases it's better to use the little dash... :)


grtz

--
Jos Lemmerling on Debian GNU/Linux			jos(@)lemmerling(.nl)


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