Rootcint: symbol lookup error: undefined symbol

ROOT
1

Hello all,
I’m trying to generate dictionaries for some simple classes, and neither using rootcint nor .L Test.hh++ in root seems to work. I have attached some simplified files that generate the error to play around with. The complete error message reads

rootcint: symbol lookup error: rootcint: undefined symbol: _ZN14G__ShadowMaker15NeedShadowClassER12G__ClassInfo

I’m using ROOT 5.11/01, by the way. Any ideas or comments would be very welcome!
Cheers,
Daniel
Types.hh.gz (106 Bytes)
Test.hh.gz (226 Bytes)
Test.cc.gz (162 Bytes)

2

I do not see a problem with your files. Both rootcint and .L Test.cc+ works.

It is likely that you did not set LD_LIBRARY_PATH correctly.
LD_LIBRARY_PATH must include $ROOTSYS/lib

Rene

3

Hello Rene,
thank you for your FAST reply! Impressive…
I checked the LD_LIBRARY_PATH, and indeed there was a problem. It was partially pointing to an old ROOT version. I have fixed this and have now $ROOTSYS/lib, $ROOTSYS/lib/root, $ROOTSYS/include and $ROOTSYS/include/root in it. However, there still seems to be something wrong with my setup. .L Test.hh++ gives me some new error message:

dlopen error: /users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./Test_hh.so: undefined symbol: _ZTI4Test
Load Error: Failed to load Dynamic link library /users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./Test_hh.so
/usr/lib/gcc-lib/i586-suse-linux/3.3.4/…/…/…/crt1.o(.text+0x18): In function _start': ../sysdeps/i386/elf/start.S:115: undefined reference tomain’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0xb8): In function ROOT::GenerateInitInstance(Test const*)': : undefined reference totypeinfo for Test’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0x3da): In function ROOT::new_Test(void*)': : undefined reference toTest::Testin-charge’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0x40b): In function ROOT::new_Test(void*)': : undefined reference toTest::Testin-charge’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0x514): In function ROOT::newArray_Test(long, void*)': : undefined reference toTest::Testin-charge’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0x5f4): In function ROOT::newArray_Test(long, void*)': : undefined reference toTest::Testin-charge’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0x8a2): In function G__fileiwlLsN_1192_1_0(G__value*, char const*, G__param*, int)': : undefined reference toTest::Testin-charge’
/users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0x9aa): more undefined referencesto Test::Test[in-charge]()' follow /users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.text+0xc0d): In functionG__fileiwlLsN_1192_3_0(G__value*, char const*, G__param*, int)’:
: undefined reference to Test::SetRecoX(double*)' /users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./fileiwlLsN.o(.gnu.linkonce.t._ZN4TestC1ERKS_+0x29): In functionTest::Test[in-charge](Test const&)’:
: undefined reference to `vtable for Test’
collect2: ld returned 1 exit status
*** Interpreter error recovered ***

, while simple compilation with rootcint -f test2.cc -c -I$ROOTSYS/include Test.hh seems to work.
I did set .include $ROOTSYS/include before. Anyway, once I try to load the .so generated by rootcint with .L Test_hh.so, I again get the error message

dlopen error: /users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./Test_hh.so: undefined symbol: _ZTI4Test
Load Error: Failed to load Dynamic link library /users/scr0_pc62/astro/greiner/tools/DoubleChooz/cvs/collaborators/anatael/DOGS/DCEvent/./Test_hh.so

I’m forgetting something here, am I not?
Cheers,
Daniel

4

You are adding to LD_LIBRARY_PATH things not related with the path.
Could you set
LD_LIBRARY_PATH=$ROOTSYS/lib
PATH=$ROOTSYS/bin:$PATH
and try
root > .L test.cc+

If you still have problems send me the output of
echo $PATH
echo $LD_LIBRARY_PATH
ls -l $ROOTSYS/bin
ls -l $ROOTSYS/lib

Could you also indicate how you install ROOT/ from source? from binaries.
It is clear that you have something wrong in your installation.

Rene

5

Hello again, Rene,
it works now! Thank you! There were indeed problems with my PATH variable: It seems a previous version of rootcint was found in another directory in the PATH, and this produced some confusion. I simply had to change the order of the entries in the PATH variable to fix that.
The only thing I had to do additionally was to include the $ROOTSYS/lib/root subdirectory, else libCore.so couldn’t be found when starting root.
Cheers,
Daniel