C API make install

#1

Hi,

I was trying to follow this tutorial on C API (https://github.com/dmlc/xgboost/blob/master/doc/tutorials/c_api_tutorial.rst#configure-cmakelist-txt-file-of-your-application-to-link-with-xgboost) but after building xgboost with
cmake .. -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX
i type make install and get the following error : make: *** No rule to make target install’. Stop.`
Any idea what is wrong? I am on windows 10 and using Visual Studio for my projects

#2

The tutorial was written to work on Linux environment.

#3

Thank you! I switched to Linux and it worked indeed, but i have another issue - when running the following code:

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include
#include <xgboost/c_api.h>

int main(int argc, char** argv) {
DMatrixHandle data;
const int ROWS = 5, COLS = 3;
const float data2[ROWS][COLS] = { {1, 2, 3}, {2, 4, 6}, {3, -1, 9}, {4, 8, -1}, {2, 5, 1} };
DMatrixHandle dmatrix2;
XGDMatrixCreateFromMat(*data2, ROWS, COLS, -1, &dmatrix2);

std::cout << “Hello world” << std::endl;
return 0;
}

and trying, while debugging, go into DMatrixHandle for example putting a breakpoint there It doesn’t git it and when i put the mouse cursor on the breakpoint i see “Module containing this breakpoint has not yet loaded or the breakpoint address could not be obtained.”

Any help please?

#4

This is because XGBoost doesn’t have the debug symbols, which are needed to set breakpoints with a debugger.

Did you install XGBoost by building it from the source? When running the cmake command, enable the debug mode by adding -DCMAKE_BUILD_TYPE=Debug:

cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX
1 Like
#5

Thanks a lot it worked!

#7

I’m interested in this topic since I have to implement XGBoost in C (on Windows). Do you have any idea of how to do it? I have tried with minGW64 but however I have problems