project files

CMakeLists.txt

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+cmake_minimum_required(VERSION 3.15.0)
+
+set(CMAKE_TOOLCHAIN_FILE cmake/toolchain.cmake)
+
+project(miner_scheduler VERSION 0.1.0)
+
+add_definitions(-DAPP_NAME="miner_scheduler")
+add_definitions(-DAPP_VERSION="0.1.0")
+add_definitions(-DAPP_GCC="${CMAKE_C_COMPILER_VERSION}")
+
+include(ExternalProject)
+include(cmake/fmt.cmake)
+include(cmake/wiringOP.cmake)
+
+include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+add_executable(miner_scheduler main.cpp
+    cmd_line_args.cpp)
+
+add_dependencies(miner_scheduler fmt wiringOP)
+

cmake/fmt.cmake

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+ExternalProject_Add(fmt
+    URL https://github.com/fmtlib/fmt/archive/refs/tags/8.1.1.tar.gz
+    #CMAKE_ARGS -DEVENT__LIBRARY_TYPE:STRING=STATIC
+    INSTALL_COMMAND ""
+    CONFIGURE_COMMAND cmake -DCMAKE_TOOLCHAIN_FILE=${CMAKE_CURRENT_SOURCE_DIR}/cmake/toolchain.cmake <SOURCE_DIR>
+    BUILD_COMMAND make fmt
+    )
+
+ExternalProject_Get_property(fmt BINARY_DIR)
+set(FMT_BINARY_DIR ${BINARY_DIR})
+
+ExternalProject_Get_property(fmt SOURCE_DIR)
+set(FMT_SRC_DIR ${SOURCE_DIR})
+
+include_directories(${FMT_SRC_DIR}/include)
+
+link_directories(${FMT_BINARY_DIR})
+link_libraries(fmt.a)

cmake/toolchain.cmake

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+set(CMAKE_AR                    /usr/bin/arm-linux-gnueabihf-ar)
+set(CMAKE_ASM_COMPILER          /usr/bin/arm-linux-gnueabihf-as)
+set(CMAKE_C_COMPILER            /usr/bin/arm-linux-gnueabihf-gcc)
+set(CMAKE_CXX_COMPILER          /usr/bin/arm-linux-gnueabihf-g++)
+set(CMAKE_LINKER                /usr/bin/arm-linux-gnueabihf-ld)
+set(CMAKE_OBJCOPY               /usr/bin/arm-linux-gnueabihf-objcopy)
+set(CMAKE_RANLIB                /usr/bin/arm-linux-gnueabihf-ranlib)
+set(CMAKE_SIZE                  /usr/bin/arm-linux-gnueabihf-size)
+set(CMAKE_STRIP                 /usr/bin/arm-linux-gnueabihf-strip)

cmake/wiringOP.cmake

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+ExternalProject_Add(wiringOP
+    GIT_REPOSITORY https://github.com/orangepi-xunlong/wiringOP
+    BUILD_IN_SOURCE true
+    CONFIGURE_COMMAND ./build clean
+    BUILD_COMMAND BOARD=orangepipc-h3 ./build
+    INSTALL_COMMAND ""
+)

cmd_line_args.cpp

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+
+#include <getopt.h>
+#include <iostream>
+#include <fmt/format.h>
+#include "cmd_line_args.h"
+
+static struct option options[] =
+        {
+            {"help",        no_argument,       NULL, '?'},
+            {"version",     no_argument,       NULL, 'v'},
+            {"config-file", optional_argument, NULL, 'c'},
+            {NULL,          0,                 NULL,  0 }
+        };
+
+static constexpr auto optc = "?v:c:";
+
+static constexpr auto help_format =
+        "{0} v{1}\n\n"
+        "Usage:\n"
+        "Availabe options are:\n"
+        "\t--help             Show help\n"
+        "\t--config-file      Config file path\n"
+        "\t--version          Version of the {0}\n"
+        "\n"
+        "Usage example:\n"
+        "{0} --config-file=scheduler.conf\n"
+        "\n\n";
+static constexpr auto version_format = 
+        "{0} v{1}\n\n"
+        "Build with gcc-{2}";  
+
+void usage() {
+    std::cout << fmt::format(help_format, APP_NAME, APP_VERSION) << std::endl;
+}
+
+void version() {
+    std::cout << fmt::format(version_format, APP_NAME, APP_VERSION, APP_GCC) << std::endl;
+}
+
+parsed_opts parse_opts(int argc, char** argv) {
+    if(argc < 1){
+        exit(1);
+    }
+
+    std::string config_file {""};
+
+    for(;;) {
+        int opt_idx, c;
+
+        if((c = getopt_long(argc, argv, optc, options, &opt_idx)) == -1) break;
+
+        switch(c) {
+        case '?':
+            usage();
+            break;
+        case 'v':
+            version();
+            break;
+        case 'c':
+            config_file = optarg;
+            break;
+        default:
+            exit(1);
+        }
+    }
+
+    return {config_file};
+}

cmd_line_args.h

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+#ifndef CMD_LINE_ARGS_H
+#define CMD_LINE_ARGS_H
+#include <string>
+
+struct parsed_opts {
+    std::string config_file;
+};
+
+parsed_opts parse_opts(int argc, char** argv);
+#endif // CMD_LINE_ARGS_H

main.cpp

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+#include "cmd_line_args.h"
+
+int main(int argc, char** argv) {
+    parse_opts(argc, argv);
+    return 0;
+}