0000085: linker errors when building statically linked simulations in release mode

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Date Submitted

Last Update

0000085

OMNeT++

simulation kernel

public

2009-07-15 20:24

2010-12-10 16:45

Reporter

andras

Assigned To

rhornig

Priority

normal

Severity

minor

Reproducibility

always

Status

resolved

Resolution

fixed

Platform

MinGW 4.2.1-sjlj (mingw32-2)

Windows

OS Version

Product Version

4.0

Target Version

Fixed in Version

4.1

Summary

0000085: linker errors when building statically linked simulations in release mode

Description

With the MinGW compiler bundled with OMNeT++ 4.0, there are linker errors when building statically linked simulations in release mode.

Sample errors:
liboppsim.a(cmessage.o):cmessage.cc:(.text+0x840): multiple definition
of `cPacket::setBitLength(long long)'
liboppsim.a(cmessage.o):cmessage.cc:(.text+0x2670): multiple definition of `cPacket::cPacket(char const*, short, long long)'
etc.

Steps To Reproduce

1. Set SHARED_LIBS=no in configure.user
2. ./configure, make cleanall, make (or make MODE=release)
3. Build stops with linker errors at the first sample simulation, Aloha

Additional Information

These errors are specific to the given compiler, they do not occur on any other platform including the Linux MinGW cross-compiler of the same version (i586-mingw32msvc-gcc (GCC) 4.2.1-sjlj (mingw32-2)).

Also, they only occur when ALL of the following are met:
- static linking selected (SHARED_LIBS=no)
- release build (make MODE=release)
- CFLAGS_RELEASE contains -O2

The error does not manifest itself when compiling with -O1 or -O3!

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Notes
(0000157) andras (administrator) 2009-07-15 20:26	Will be resolved by shipping the new version of MinGW (4.4.0) with OMNeT++ 4.1.

(0000158) andras (administrator) 2009-07-15 20:27	Suggested workaround: uncomment CFLAGS_RELEASE in configure.user, and change -O2 to either -O1 or -O3.

(0000351) rhornig (administrator) 2010-12-10 16:45	The new gcc 4.5 compiler bundled with OMNeT 4.1 resolves this issue. (tested)

Issue History
Date Modified	Username	Field	Change
2009-07-15 20:24	andras	New Issue
2009-07-15 20:26	andras	Note Added: 0000157
2009-07-15 20:26	andras	Status	new => confirmed
2009-07-15 20:27	andras	Note Added: 0000158
2010-03-31 17:00	rhornig	Status	confirmed => to be tested
2010-12-10 16:45	rhornig	Note Added: 0000351
2010-12-10 16:45	rhornig	Status	to be tested => resolved
2010-12-10 16:45	rhornig	Fixed in Version	=> 4.1
2010-12-10 16:45	rhornig	Resolution	open => fixed
2010-12-10 16:45	rhornig	Assigned To	=> rhornig