Hello,
I am trying to compile a project with multiple source and header files. I
am new to CMake. In the main directory, there is main.cc file. All other
files including header and source files are stored in a subdirectory src.
The class ibvp is similar to TopLevel class in step 18. It is defined in
src/ibvp.h and src/ibvp.cc . In the main file, I have added #include
"src/ibvp.h". There are 2 CMakeLists.txt, one in the main folder and
another in the src folder. The one in the src folder is used to create a
library mylib with all the source files. The modified lines in this cmake
file are:
---
SET(TARGET "mylib")
PROJECT(${TARGET})
SET(CMAKE_BUILD_TYPE Debug)
file(GLOB mylib_files *.cc)
add_library(mylib ${mylib_files})
DEAL_II_SETUP_TARGET(${TARGET})
---
Both cmake and make are running without error.
<${main_directory}/src>$ make -j8
[ 11%] Building CXX object CMakeFiles/mylib.dir/assemble.cc.o
[ 22%] Building CXX object CMakeFiles/mylib.dir/boundarycondition.cc.o
[ 33%] Building CXX object CMakeFiles/mylib.dir/ibvp.cc.o
[ 44%] Building CXX object CMakeFiles/mylib.dir/output.cc.o
[ 55%] Building CXX object CMakeFiles/mylib.dir/setup_system.cc.o
[ 66%] Building CXX object CMakeFiles/mylib.dir/solve.cc.o
[ 77%] Building CXX object CMakeFiles/mylib.dir/utils.cc.o
[ 88%] Building CXX object CMakeFiles/mylib.dir/gausspoint.cc.o
[100%] Linking CXX static library libmylib.a
[100%] Built target mylib
After this, I try to compile the main.cc code by linking it with the
library mylib in the src folder. The modified lines in this cmake file are:
---
SET(TARGET "main")
PROJECT(${TARGET})
SET(CMAKE_BUILD_TYPE Debug)
INCLUDE_DIRECTORIES(src)
add_subdirectory(src)
ADD_EXECUTABLE(${TARGET} ${TARGET}.cc)
DEAL_II_SETUP_TARGET(${TARGET})
target_link_libraries(${TARGET} mylib)
---
CMake is not giving any error. But when I run make, I get the following
error:
<${main_directory}>$ make -j8
Consolidate compiler generated dependencies of target mylib
[ 9%] Building CXX object src/CMakeFiles/mylib.dir/assemble.cc.o
[ 18%] Building CXX object src/CMakeFiles/mylib.dir/boundarycondition.cc.o
[ 27%] Building CXX object src/CMakeFiles/mylib.dir/gausspoint.cc.o
[ 36%] Building CXX object src/CMakeFiles/mylib.dir/ibvp.cc.o
[ 45%] Building CXX object src/CMakeFiles/mylib.dir/output.cc.o
[ 54%] Building CXX object src/CMakeFiles/mylib.dir/setup_system.cc.o
[ 63%] Building CXX object src/CMakeFiles/mylib.dir/solve.cc.o
[ 72%] Building CXX object src/CMakeFiles/mylib.dir/utils.cc.o
[ 81%] Linking CXX static library libmylib.a
[ 81%] Built target mylib
[ 90%] Building CXX object CMakeFiles/main.dir/main.cc.o
[100%] Linking CXX executable main
/home/sabyasachi/Documents/current_research/irradiated_materials/irradiated_tension_engg_400C/main.cc:96:
error: undefined reference to 'ibvp<3>::ibvp()'
/home/sabyasachi/Documents/current_research/irradiated_materials/irradiated_tension_engg_400C/main.cc:98:
error: undefined reference to 'ibvp<3>::run()'
/home/sabyasachi/Documents/current_research/irradiated_materials/irradiated_tension_engg_400C/main.cc:99:
error: undefined reference to 'ibvp<3>::~ibvp()'
/home/sabyasachi/Documents/current_research/irradiated_materials/irradiated_tension_engg_400C/main.cc:99:
error: undefined reference to 'ibvp<3>::~ibvp()'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/main.dir/build.make:132: main] Error 1
make[1]: *** [CMakeFiles/Makefile2:100: CMakeFiles/main.dir/all] Error 2
make: *** [Makefile:91: all] Error 2
So there are undefined references to the ibvp class constructor,
destructor and run function. Please suggest how to resolve this. I have
attached all the relevant files with only the relevant lines of code. I
would appreciate any help.
Thank you.
--
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...
#include "ibvp.h"
//namespace problem
//{
using namespace dealii;
using namespace std;
#ifndef IBVP_CC
#define IBVP_CC
template <int dim>
ibvp<dim>::ibvp()
: (all initialization)
{
...
}
template <int dim>
ibvp<dim>::~ibvp()
{
...
}
template <int dim>
void ibvp<dim>::run()
{
...
}
#endif
//}
...
#include "src/ibvp.h"
//#include "src/utils.h"
int main(int argc, char **argv)
{
try
{
using namespace dealii;
Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv, 1);
std::cout<<"\n Starting...";
ibvp<3> irradiation;
std::cout<<"\n Object created...";
irradiation.run();
}
...
}
##
# CMake script for the initial boundary value problem:
##
# (cmake and deal ii requirement checks - from CMakeLists.txt of Step 18)
# changes made my me
SET(TARGET "mylib")
PROJECT(${TARGET})
SET(CMAKE_BUILD_TYPE Debug)
file(GLOB mylib_files *.cc)
add_library(mylib ${mylib_files})
DEAL_II_SETUP_TARGET(${TARGET})
##
# CMake script for the initial boundary value problem:
##
# (cmake and deal ii requirement checks - from CMakeLists.txt of Step 18)
DEAL_II_INITIALIZE_CACHED_VARIABLES()
#changes made by me
SET(TARGET "main")
PROJECT(${TARGET})
SET(CMAKE_BUILD_TYPE Debug)
INCLUDE_DIRECTORIES(src)
add_subdirectory(src)
# Set the name of the project and target:
ADD_EXECUTABLE(${TARGET} ${TARGET}.cc)
DEAL_II_SETUP_TARGET(${TARGET})
target_link_libraries(${TARGET} mylib)
...
...
#ifndef IBVP_H
#define IBVP_H
template <int dim>
class ibvp
{
public:
ibvp();
~ibvp();
void run();
//Tensor<4, dim> get_stress_strain_tensor_lagrangian() {return stress_strain_tensor_lagrangian;};
(all function definitions e.g. setup system, assemble, solve, output etc.)
...
//double km_prefactor;
};
#endif
//}
