Debian Bug report logs - #51267
-lieee -lm cannot generate shared binaries

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Samuel Tardieu <sam@debian.org>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: -lieee -lm cannot generate shared binaries

Date: Thu, 25 Nov 1999 17:46:26 +0100

Package: libc6-dev
Version: 2.1.2-10
Severity: normal

-lm -lieee cannot be used in shared mode. This prevents Erlang from building
cleanly.

% gcc -shared -o t.so t.c -lm
% gcc -shared -o t.so t.c -lieee
% gcc -shared -o t.so t.c -lieee -lm
% gcc -shared -o t.so t.c -lm -lieee
ld: t.so: undefined versioned symbol name _LIB_VERSION@@GLIBC_2.0
ld: failed to set dynamic section sizes: Bad value

  Sam

-- System Information
Debian Release: potato
Architecture: i386
Kernel: Linux antinea 2.2.13 #1 Mon Nov 8 12:40:02 CET 1999 i686

Versions of packages libc6-dev depends on:
ii  libc6                         2.1.2-10   GNU C Library: Shared libraries an

Message #10 received at 51267-done@bugs.debian.org (full text, mbox, reply):

From: GOTO Masanori <gotom@debian.or.jp>

To: Samuel Tardieu <sam@debian.org>, 51267-done@bugs.debian.org, debian-glibc@lists.debian.org

Subject: Re: -lieee -lm cannot generate shared binaries

Date: Tue, 07 Jan 2003 01:32:21 +0900

> -lm -lieee cannot be used in shared mode. This prevents Erlang from building
> cleanly.
> 
> % gcc -shared -o t.so t.c -lm
> % gcc -shared -o t.so t.c -lieee
> % gcc -shared -o t.so t.c -lieee -lm
> % gcc -shared -o t.so t.c -lm -lieee
> ld: t.so: undefined versioned symbol name _LIB_VERSION@@GLIBC_2.0
> ld: failed to set dynamic section sizes: Bad value

No, -lieee have to place prior to -lm.  -lieee forces IEEE error 
handling rules for math functions in linking with -lm.  So, if you
put -lieee after -lm, it's meaningless.

If you think this matter should be in libc info, please tell us.
But I wonder why you use -lieee without any knowledge of its role.
I guess -lieee is needed for compiling on another archs/OSes...

Regards,
-- gotom

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