Problem _GLOBAL__sub_I_cling_module_32

[cxwx]

I try to use root with shared libsofa_c.dylib (http://www.iausofa.org/current_C.html#Downloads)

gSystem->Load("lib/libsofa_c.dylib");

run after g++ compile, is OK.
but
root pro1.cpp
cause

IncrementalExecutor::executeFunction: symbol 'iauDtf2d' unresolved while linking function '_GLOBAL__sub_I_cling_module_32'!

anybody know that which situation could cause the problem?

---

_ROOT Version:6.18.04 homebrew
_Platform:mac OS X catalina

---

[Axel]

I don’t see pro1.cpp in the library sources.

You likely need to load the library before running code from it. I’m not sure what your issue is here?

Axel.

[cxwx]

I’m sorry. I did not make it clear
pro1.cpp has the code below

void pro1()
{
   gSystem->Load("lib/libsofa_c.dylib");
   iauDtf2d(...);
}

int main(){pro1();}

with

g++ `root-config --libs --cflags` -lsofa_c

this is OK.

but below

root -l -b -q pro1.cpp 

cause the problem

IncrementalExecutor::executeFunction: symbol 'iauDtf2d' unresolved while linking function '_GLOBAL__sub_I_cling_module_32'!

I built libsofa_c with gcc -fPIC -dynamiclib

[Axel]

When pro1.cpp gets “compiled” in the interpreter it needs to find the symbol for iauDtf2d - which is only provided when running pro1(), which is too late. Instead please use

R__LOAD_LIBRARY(lib/libsofa_c.dylib)
void pro1()
{
   iauDtf2d(...);
}

int main(){pro1();}

[cxwx]

problem solved thanks