Hello,
I have found difference in the linkdef file
behaviour depending if this latter is named
as “XXXLLinkDef.h” or “XXX_linkdef.h” where
XXX is the name of the source file.
I attached a (small) example.
Just do :
root>.L SourceFiles.cxx+
compilation works fine.
Change then XXX_linkdef.h to XXXLinkDef.h
and recompile SoucrFiles.cxx,
I get the following output :
root [0] .L SourceFiles.cxx++
Info in TUnixSystem::ACLiC: creating shared library
/home/greder/boulot/code/cms/Dev/test/./SourceFiles_cxx.so
dlopen error: /home/greder/boulot/code/cms/Dev/test/./SourceFiles_cxx.so:
undefined symbol: _ZTV1A
Load Error: Failed to load Dynamic link library
/home/greder/boulot/code/cms/Dev/test/./SourceFiles_cxx.so
/usr/lib/gcc/i386-redhat-linux/4.0.0/…/…/…/crt1.o(.text+0x18): In
function _start': : undefined reference tomain’
/home/greder/boulot/code/cms/Dev/test/./fileNwiyTr.o(.text+0x24): In
function A::A()': fileNwiyTr.cxx: undefined reference tovtable for A’
/home/greder/boulot/code/cms/Dev/test/./fileNwiyTr.o(.text+0x5a): In
fileNwiyTr.cxx: undefined reference to vtable for A' /home/greder/boulot/code/cms/Dev/test/./fileNwiyTr.o(.text+0x5a): In functionA::A()’:
fileNwiyTr.cxx: undefined reference to vtable for A' /home/greder/boulot/code/cms/Dev/test/./fileNwiyTr.o(.text+0x90): In functionB::B()’:
fileNwiyTr.cxx: undefined reference to vtable for B' /home/greder/boulot/code/cms/Dev/test/./fileNwiyTr.o(.text+0xc6): In functionB::B()’:
fileNwiyTr.cxx: undefined reference to `vtable for B’
collect2: ld returned 1 exit status
*** Interpreter error recovered ***
root [1] .q
Could someone tell me if I misunderstood something ?
thanks, seb
ps :
[greder@localhost test]$ uname -a
Linux localhost.localdomain 2.6.11-1.1369_FC4 #1 Thu Jun 2 22:55:56 EDT 2005
i686 i686 i386 GNU/Linux
[greder@localhost test]$ root-config --version
4.04/02b
[greder@localhost test]$ gcc -v
Using built-in specs.
Target: i386-redhat-linux
Configured with: …/configure --prefix=/usr --mandir=/usr/share/man
–infodir=/usr/share/info --enable-shared --enable-threads=posix
–enable-checking=release --with-system-zlib --enable-__cxa_atexit
–disable-libunwind-exceptions --enable-libgcj-multifile
–enable-languages=c,c++,objc,java,f95,ada --enable-java-awt=gtk
–with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre
–host=i386-redhat-linux
Thread model: posix
gcc version 4.0.0 20050519 (Red Hat 4.0.0-8)
Thread model: posix
gcc version 4.0.0 20050519 (Red Hat 4.0.0-8)
@------------------------------------------@
Dr. Sebastien Greder, Imperial College
Office : (0044)-0207-594-1626
Fax : (0044)-0207-823-8830
imperial.ac.uk/research/hep/
@------------------------------------------@