头文件C ++中的更改会被忽略吗？

如何解决头文件C ++中的更改会被忽略吗？

所以最近我正在用C ++处理头文件，出现了一些非常奇怪的事情。在我的头文件中，我定义了我的类，例如一个使用文件名数组加载声音样本的音频播放器：

#define NUM_WAVEFORMS 19

class AudioPlayer {
private:
    const char _waveFileNames[NUM_WAVEFORMS][40] = {"audio/startup_seq.wav","audio/startup_warning.wav","audio/start_signal.wav","audio/warning_person.wav","audio/warning_bicycle.wav","audio/warning_car.wav","audio/warning_motorcycle.wav","audio/warning_bus.wav","audio/warning_trafficlight_red.wav","audio/warning_trafficlight_green.wav","audio/warning_sidewalk.wav","audio/warning_uphill.wav","audio/warning_downhill.wav","audio/suggestion_bench.wav","audio/suggestion_chair.wav","audio/suggestion_bin.wav","audio/to_day.wav","audio/to_night.wav","audio/to_park.wav"};
    Mix_Chunk* _sample[NUM_WAVEFORMS];
public:
...

现在我注意到的是，当我更改文件名数组，重命名元素或添加新的元素时，在编译时不会应用此更改。当我在主.cpp文件中打印数组的元素时，由于数组处于先前状态，我得到了错误的索引和元素。当我将数组的长度更改为1并尝试合法访问最后一个元素时，它给了我一个分段错误，这意味着它假定它不存在。这里发生了什么？我感觉我的头文件没有正确编译。

这是我的CMakeLists.txt：（Yolo_with_Opencv是我的主要C ++文件）

cmake_minimum_required (VERSION 3.5)
include(FindPkgConfig)

project (Yolo_with_Opencv)

set (CMAKE_CXX_STANDARD 11)
set (CMAKE_CXX_STANDARD_REQUIRED TRUE)
set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Werror -std=c++11 -pthread")
set (source_dir "${PROJECT_SOURCE_DIR}/src/")
SET (OpenCV_DIR "/home/installation/OpenCV-3.3.1/opencv/include/opencv2")

file (GLOB source_files "${source_dir}/Yolo_with_Opencv.cpp")

find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
find_package(SDL2 REQUIRED)
include_directories(${SDL2_INCLUDE_DIRS})
pkg_check_modules(SDL2_Mixer REQUIRED IMPORTED_TARGET SDL2_mixer)
find_package(ALSA REQUIRED)
include_directories(${ALSA_INCLUDE_DIRS})

add_executable (Yolo_with_Opencv ${source_files})
target_include_directories(Yolo_with_Opencv PRIVATE ${source_dir})
target_link_libraries(Yolo_with_Opencv ${OpenCV_LIBS})
target_link_libraries(Yolo_with_Opencv ${SDL2_LIBRARIES})
target_link_libraries(Yolo_with_Opencv PkgConfig::SDL2_Mixer)
target_link_libraries(Yolo_with_Opencv ${ALSA_LIBRARIES})
target_link_libraries(Yolo_with_Opencv i2c)

谢谢！

解决方法

我认为，cmake不监视文件更改的原因是未将文件作为依赖项添加到目标。您将source_fles定义为单个cpp文件。将头文件添加到source_file变量中，文件中的任何更改都会触发重新编译。