c++/454: Template instanciation failure on i686-pc-linux-gnu

[pnobili at cgg dot com]

>Number:         454
>Category:       c++
>Synopsis:       Template instanciation failure on i686-pc-linux-gnu
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 08 04:16:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     pnobili@cgg.com
>Release:        gcc version 2.95.2 19991024 (release)  (gcc -v)
>Organization:
>Environment:
Linux [hostname] 2.2.14-6.1.1 #1 Thu Apr 13 20:01:58 EDT 2000 i686 unknown
>Description:
Gcc 2.95.2 fails to instanciate template on i868-pc-linux-gnu
targets.

'-frepo' option is used while compiling source code. Afterwards,
a "pre-link" phase is done to force template instanciation
before including object files in a library:

gcc -frepo WorkSession.o

This pre-link phase fails to instanciate template 
GmList<GmWorkSessionHistoryLog*>::clear() properly on 
i868-pc-linux-gnu targets. It works well on
SunOS5.x and IRIX6.x targets (same compiler version).

The WorkSession.rpo does not seem to contain all template
information (.rpo files produced on SunOS and IRIX are
different).
>How-To-Repeat:
a) gcc -c -frepo WorkSession.C  ==> WorkSession.o,rpo
b) gcc -frepo WorkSession.o     ==> pre-link

Produces:

collect: recompiling WorkSession.C
collect: relinking
/usr/lib/crt1.o(.text+0x18): undefined reference to `main'
WorkSession.o: In function `GmList<GmWorkSessionHistoryLog *>::~GmList(void)':
WorkSession.o(.text+0xfb): undefined reference to `GmList<GmWorkSessionHistoryLog *>::clear(void)'
collect2: ld returned 1 exit status
>Fix:
None that I am aware of except using explicit template 
instanciation schemes, that are not very practical in my 
case.
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="WorkSession.C"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="WorkSession.C"

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