Bug 258021 - compat-gcc-32 dependency on GLIBC_2.3.4
compat-gcc-32 dependency on GLIBC_2.3.4
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: compat-gcc-32 (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Jakub Jelinek
Depends On:
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Reported: 2007-08-27 16:42 EDT by Sev Binello
Modified: 2007-11-16 20:14 EST (History)
0 users

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2007-08-28 12:44:26 EDT
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Attachments (Terms of Use)
simple C++ program that demonstrated g++32 dependency on GLIBC_2.3.4 (1.95 KB, text/plain)
2007-08-27 17:07 EDT, Sev Binello
no flags Details

  None (edit)
Description Sev Binello 2007-08-27 16:42:47 EDT
Description of problem:

When using gcc32 on WS4 to build executables that we need to run on WS3 and WS4
a dependency on GLIBC_2.3.4 is incurred, thus we cannot run the executable on
WS3 machines. We have found that the dependency only occurs if we make a call
to "regexec".

Version-Release number of selected component (if applicable):

gcc32 (GCC) 3.2.3 20030502 (Red Hat Linux 3.2.3-47.3)

How reproducible:

Steps to Reproduce:
1.Build something that calls regexec on WS4 using gcc32 
2. Run it on WS3 machine
Actual results:
Get error that it cant find GLIBC_2.3.4

Expected results:
Should not build against GLIBC_2.3.4

Additional info:
Comment 1 Sev Binello 2007-08-27 17:07:58 EDT
Created attachment 174401 [details]
simple C++ program that demonstrated g++32 dependency on GLIBC_2.3.4

This is a simple C++ program that demonstrated g++32 dependency on GLIBC_2.3.4.

If you comment out the line with regexec then the dependency is eliminated
Comment 2 Jakub Jelinek 2007-08-28 12:44:26 EDT
If you are not linking against compat-glibc, you have to expect that.
So say on i386 that means compiling with
g++32 -I /usr/lib/i386-redhat-linux3E/include \
  -B /usr/lib/i386-redhat-linux3E/lib/
after making sure you have compat-glibc and compat-glibc-headers installed
if you want to run it on RHEL3.
Comment 3 Sev Binello 2007-08-28 13:01:48 EDT
Thank you, I will try that.
Is this process 
(i.e creating binaries on newer versions of RHat OS for older versions of OS)
documented anywhere, so I wont have to stumble around so much ?
Comment 4 Sev Binello 2007-08-28 13:16:36 EDT
Ok tried it.
Worked fine when using g++32 (with or without -I /usr/... and -B /usr/...) 
Are the -I and -B actually needed ?

Had problem when using gcc32 
See Below...

  gcc32 regexec2.cxx -I /usr/lib/i386-redhat-linux3E/include -B   

/tmp/cc07FBBf.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status

Any idea why everything else worked ok before until we ran into the regexec call ?
Comment 5 Jakub Jelinek 2007-08-28 13:20:19 EDT
You shouldn't use gcc (resp. gcc32) to link C++ stuff, g++ (resp. g++32) takes
care of linking in libstdc++ and passing other needed options (in this case
-shared-libgcc is what matters).
Comment 6 Sev Binello 2007-08-28 15:05:26 EDT
Ok, but can you point me to documentation for using the compat libs.
Comment 7 Jakub Jelinek 2007-08-28 15:17:52 EDT
LC_ALL=C rpm -qpi compat-glibc-2.3.2-95.30.i386.rpm
Name        : compat-glibc                 Relocations: (not relocatable)
Version     : 2.3.2                             Vendor: Red Hat, Inc.
Release     : 95.30                         Build Date: Tue Nov 16 13:11:37 2004
Install Date: (not installed)               Build Host: porky.build.redhat.com
Group       : Development/Libraries         Source RPM:
Size        : 3569066                          License: LGPL
Signature   : DSA/SHA1, Wed Jan  5 17:05:00 2005, Key ID 219180cddb42a60e
Packager    : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
Summary     : Compatibility C library
Description :
This package contains stub shared libraries and static libraries
from Red Hat Enterprise Linux 3.
To compile and link against these compatibility libraries, use
gcc32 -I /usr/lib/i386-redhat-linux3E/include \
      -B /usr/lib/i386-redhat-linux3E/lib/
Comment 8 Sev Binello 2007-09-06 16:50:49 EDT
Sorry, but this regexec keeps coming back to haunt us.
I have setup the compat libs and switches so as to produce
a WS3 compatible binary from WS4 machine as you outlined above

But now I cant link the WS3 copatatible binary on the WS4 machine
because  libXm.so has a dependency on 2.3.4
  /usr/X11R6/lib/libXm.so: undefined reference to `regexec@GLIBC_2.3.4

And who knows what other libs will also have this problem.
Can you tell us what  approach we should take here?



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