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Can't build SSDL from the source code of the book C++ for the Lazy Programmers（1个答案）
3天前关闭。
我正在尝试在我的VS代码上安装SDL（https://www.libsdl.org），因为我正在阅读使用SDL的书"Will_Briggs_C ++20_for_Lazy_Programmers_Quick，_Easy，_and_Fun_C ++"。但是在书中不使用VS代码，所以我正在尝试自己管理如何安装。我遵循了Youtube教程（例如：https://youtu.be/jUZZC9UXyFs），但遇到了麻烦-我包含了库，添加了SDL2.dll文件，尝试写入Makefile命令，但编译器无法识别每个SDL命令。出了什么问题？（最后的屏幕截图）源文件来自第1章，文件夹"ch1\test-setup"：https://github.com/Apress/cpp20-for-lazy-programmers
我的主文件：

#include <iostream>
#include "include\SDL2\SDL.h"

using namespace std;

int main(int argc, char **argv)
{
    // Initial window setup
    SSDL_SetWindowTitle("Simple tester program");
    SSDL_SetWindowSize(500, 375);

    // Load and play music
    SSDL_Music music = SSDL_LoadMUS("media/457729__razor5__boss-battle-2-0.wav");
    SSDL_VolumeMusic(int(MIX_MAX_VOLUME * 0.50));
    SSDL_PlayMusic(music, SSDL_FOREVER);

    // Show image
    const SSDL_Image BULLSEYE = SSDL_LoadImage("media/bullseye.jpg");
    SSDL_RenderImage(BULLSEYE, 0, 0);

    // Set font and color
    const SSDL_Font FONT = SSDL_OpenSystemFont("georgiab.ttf", 28);
    SSDL_SetFont(FONT);
    SSDL_SetRenderDrawColor(BLACK);

    // Make a label in the middle, centered
    sout << " Success! You should see\n  the bullseye,\n";
    sout << "  read this message,\n";
    sout << "  and hear music.\n\n\n\n";
    sout << " Hit any key to end.\n";

    // End program
    SSDL_WaitKey();
    return 0;
}

和Makefile：

# A makefile that should work for any SSDL projects
# Adapt as needed
#  -- from the SDL (Simple SDL) library, but no copyright is claimed

EXECUTABLE      = a.out                     #Yes, you can call it this and it should run, even in MinGW

C_SOURCES       = $(wildcard *.c)           #We'll try to compile all .c, .cpp, and .cc files
CPP_SOURCES     = $(wildcard *.cpp)
CC_SOURCES      = $(wildcard *.cc)

C_OBJECTS       = ${C_SOURCES:      .c  =.o}#Now we know what .o files we'll need to create
CPP_OBJECTS     = ${CPP_SOURCES:   .cpp=.o}
CC_OBJECTS      = ${CC_SOURCES: .cc =.o}
ALL_OBJECTS     = $(notdir $(C_OBJECTS) $(CPP_OBJECTS) $(CC_OBJECTS))

#       Tell g++ where to find include files for SDL2, SSDL
INCLUDES        =   ../../external/SDL2-MinGW/SDL2/i686-w64-mingw32/include/SDL2        \
                    ../../external/SDL2-MinGW/SDL2_image/i686-w64-mingw32/include/SDL2  \
                    ../../external/SDL2-MinGW/SDL2_mixer/i686-w64-mingw32/include/SDL2  \
                    ../../external/SDL2-MinGW/SDL2_ttf/i686-w64-mingw32/include/SDL2    \
                    ../../external/SSDL/include                                         \
                    ../../external/fmt-master/include
                    
INCLUDE_FLAGS   = $(foreach dir,    $(INCLUDES),     -I$(dir))

LANGUAGE_FLAGS  = -std=gnu++2a              #Specify language standard: C++20
#                                           MinGW can't do the fmt library
#                                           unless we specify gnu++ to add gnu
#                                           extensions, so I'll just use it throughout.

#       Tell g++ where to find library files for SDL2, SSDL
#       Sometimes library order matters.  If this is a problem
#        in the future -- if it says it can't find something that's in one of the 
#        listed libraries -- try putting libraries in different order 

LIBRARIES       := mingw32 ssdl SDL2main SDL2 SDL2_image SDL2_TTF SDL2_Mixer 
LIBRARY_DIRS    :=  ../../external/SDL2-MinGW/SDL2/i686-w64-mingw32/lib         \
                    ../../external/SDL2-MinGW/SDL2_image/i686-w64-mingw32/lib   \
                    ../../external/SDL2-MinGW/SDL2_mixer/i686-w64-mingw32/lib   \
                    ../../external/SDL2-MinGW/SDL2_ttf/i686-w64-mingw32/lib     \
                    ../../external/SSDL/mingw
LIB_FLAGS       := $(foreach library,$(LIBRARIES),    -l$(library))
LIB_DIR_FLAGS   := $(foreach libdir, $(LIBRARY_DIRS), -L$(libdir))

ALL_FLAGS       := $(INCLUDE_FLAGS) $(LANGUAGE_FLAGS) $(LIB_FLAGS) $(LIB_DIR_FLAGS)

##########################################################################

all: $(EXECUTABLE)
    g++ -I src/include -L src/lib -o main main.cpp -lmingw32 -lSDL2main -lSDL2 
#changes from Youtube

$(EXECUTABLE): $(ALL_OBJECTS)
#   echo 'ALL_FLAGS :' $(ALL_FLAGS)
    g++ -o $@ $^ -g $(ALL_FLAGS) 
#   -g means:    support debugging
#   $^ means:    use all the objects
#   -o $@ means: let the output be called $(EXECUTABLE)

clean:
    rm -f $(EXECUTABLE)
    rm -f *.o
    rm -f core
    rm -f *.ncb *.sdf
    rm -r -f Debug Release .vs Backup

尝试在StackOver和SDL问题（https://github.com/libsdl-org/SDL/issues）中查找信息，但没有类似的问题。可能这是一个简单的修复，但我不明白。