Eigen3 PSP working example

build_psp.sh

#!/bin/bash

mkdir -p build/psp
cd build/psp || exit
cmake -DCMAKE_TOOLCHAIN_FILE="$PSPDEV/psp/share/pspdev.cmake" ../../ &&
make -j2

CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

project(eigen-example)

add_executable(${PROJECT_NAME} main.cpp)

IF(PLATFORM_PSP)
        find_package(PkgConfig REQUIRED)
        pkg_check_modules(EIGEN3 REQUIRED eigen3)

        message(STATUS "EIGEN3_INCLUDE_DIRS: ${EIGEN3_INCLUDE_DIRS}")
        message(STATUS "EIGEN3_LIBRARIES: ${EIGEN3_LIBRARIES}")

        target_include_directories(${PROJECT_NAME} PRIVATE ${EIGEN3_INCLUDE_DIRS})
        target_link_libraries(${PROJECT_NAME} PRIVATE ${EIGEN3_LIBRARIES})

        target_link_libraries(${PROJECT_NAME} PRIVATE
		pspdisplay
		pspge
		pspdebug
                stdc++
	)
        create_pbp_file(
                TARGET ${PROJECT_NAME}
                ICON_PATH NULL
                BACKGROUND_PATH NULL
                PREVIEW_PATH NULL
                TITLE ${PROJECT_NAME}
		BUILD_PRX
        )
ELSE()
    find_package(Eigen3 REQUIRED)
    link_directories(${Eigen_INCLUDE_DIRS})
    target_link_libraries(${PROJECT_NAME} ${Eigen_LIBRARIES})
ENDIF()

if (PLATFORM_PSP)
        target_compile_definitions(${PROJECT_NAME} PRIVATE IS_PSP)
endif()

main.cpp

#ifdef IS_PSP
#include <pspkernel.h>
#include <pspdebug.h>
#endif

#include <eigen3/Eigen/Core>
#include <eigen3/Eigen/Dense>

#ifdef IS_PSP
PSP_MODULE_INFO("Hello World", 0, 1, 1);
#define printf pspDebugScreenPrintf
#else
#include <stdio.h>
#endif

int print_eigen(Eigen::MatrixX3d m)
{
    for (int i = 0; i < m.rows(); i++)
    {
        for (int j = 0; j < m.cols(); j++)
            printf("%.1f ", m(i, j));
        printf("\n");
    }

    return 0;
}

auto main() -> int
{
#ifdef IS_PSP
    pspDebugScreenInit();
#endif

    Eigen::Matrix3d test; // 3 by 3 double precision matrix initialization

    printf("Hello World!\n");

    // Let's make it a symmetric matrix
    for (int i = 0; i < 3; i++)
        for (int j = 0; j < 3; j++)
            test(i, j) = (i + 1) * (1 + j);

    print_eigen(test);

#ifdef IS_PSP
    while (1)
        ;
    sceKernelExitGame();
#endif

    return 0;
}