Compile Macro with GSL libraries

[Nyx]

I have a macro to solve differential equations using the RK4 method in the GSL libraries.
At the top of my .cpp file I have

R__LOAD_LIBRARY(gsl);

#include <gsl/gsl_matrix.h>

#include <gsl/gsl_odeiv2.h>

with the other libraries that I need.

If type .x mycode.cpp, and .L mycode.cpp my code works and I get good results. However, if I try to compile with .L mycode.cpp+ I get the next error message:

Info in TUnixSystem::ACLiC: creating shared library /mnt/e/user/Desktop/mycode_cpp.so
cling::DynamicLibraryManager::loadLibrary(): /mnt/e/user/Desktop/mycode_cpp.so: undefined symbol: gsl_odeiv2_step_rk4
/mnt/e/user/Desktop/mycode_cpp_ACLiC_dict.o: In function main': mycode_cpp_ACLiC_dict.cxx:(.text+0x1985): undefined reference to gsl_odeiv2_step_rk4’
mycode_cpp_ACLiC_dict.cxx:(.text+0x19a8): undefined reference to gsl_odeiv2_step_alloc' mycode_cpp_ACLiC_dict.cxx:(.text+0x19d6): undefined reference to gsl_odeiv2_control_y_new’
mycode_cpp_ACLiC_dict.cxx:(.text+0x19ec): undefined reference to gsl_odeiv2_evolve_alloc' mycode_cpp_ACLiC_dict.cxx:(.text+0x24c2): undefined reference to gsl_odeiv2_evolve_apply’
mycode_cpp_ACLiC_dict.cxx:(.text+0x27f6): undefined reference to gsl_odeiv2_evolve_free' mycode_cpp_ACLiC_dict.cxx:(.text+0x2805): undefined reference to gsl_odeiv2_control_free’
mycode_cpp_ACLiC_dict.cxx:(.text+0x2814): undefined reference to `gsl_odeiv2_step_free’
collect2: error: ld returned 1 exit status

I believe those gsl functions are defined in gsl_odeiv2.h, so I don’t understand this error.

How can I solve this?

[Wile_E_Coyote]

Symbol 'gsl_sf_bessel_J0' unresolved while linking [cling interface function]

In ROOT 5, you need to use ACLiC and you need to load the system provided gsl manually so, try: root [0] gSystem->Load("/usr/lib/libgsl"); // load the system provided gsl root [1] .x test.cxx++ In ROOT 6, there is no need to use ACLiC and your macro can automatically load the system provided gsl, if you add R__LOAD_LIBRARY(libgsl) right in the beginning of your macro. If you have the “builtin_gsl” (i.e. when “root-config --has-builtin_gsl” returns “yes”), you may try: root [0] gSystem->Load(…

Problem on using GSL on root

Rename “main(int argc,char const *argc[])” into “test(void)”, then try: root [0] gSystem->Load("/usr/lib/libgsl.so"); // see: locate libgsl.so root [1] .x test.c++ and / or: root [0] gSystem->AddLinkedLibs("-lgslcblas -lgsl"); // see: gsl-config --libs root [1] .x test.c++

Just for future reference purposes … Makefile with gsl libraries

[Nyx]

I added R__LOAD_LIBRARY(libgsl) at the top of my macro, and I keep getting the same error. However, if I type this in a root command line and then compile, it works. How is this possible?

EDIT: My ROOT version is 6.12/04

[Wile_E_Coyote]

Attach the output from:

root-config --has-builtin_gsl
gsl-config --libs
locate libgsl

[Nyx]

Sorry, I don’t understand your suggestion. What should I try exactly?

[Wile_E_Coyote]

@pcanal On second thought … I guess the ACLiC problems come from a “known” deficiency:

gSystem->Load() Vs. R__LOAD_LIBRARY with ACLiC

Actually, I also expected ACLiC (via “rootcling” / “rootcint”, which are automatically executed) to respect “R__LOAD_LIBRARY”, “R__ADD_INCLUDE_PATH” and “R__ADD_LIBRARY_PATH” macros. Apparently, it is not the case in the current ROOT (e.g. 6.14/08 and 6.16/00).

gSystem->Load() Vs. R__LOAD_LIBRARY with ACLiC

This has always been the plan. It requires to update rootlcing to ‘understand’ R__LOAD_LIBRARY and to pass the information down when --lib-list-prefix is used (by ACLiC).

[chaos]

Can you share your differential equation program.