Question

我试图交叉编译我正在做的软件。我正在使用Linux，而且我很难尝试使用SDL2编写用于编译DLL库的Makefile。这是它：

#the compiler
CC = i686-w64-mingw32-gcc

#the standart ompilation flags of the project
CFLAGS = -O3 -Wall -Wno-unused-variable -Wno-unused-but-set-variable -Wno-implicit-function-declaration

#path to the folder's root, where the holy not build framework is. Relate to this Makefile
PREPATH = ..

#Path to the SDL, SDL_image and Lua includes and libs
SDL2INCLUDES = -I $(PREPATH)/SDL2/include
SDL2LIBS = $(PREPATH)/BINARIES/4windows/SDL2/64/SDL2.dll
SDLIMAGE2INCLUDES = -I $(PREPATH)/SDL2/SDL_image
SDLIMAGE2LIBS = $(PREPATH)/BINARIES/4windows/SDL2_image/64/SDL2_image.dll $(PREPATH)/BINARIES/4windows/SDL2_image/64/libjpeg-9.dll $(PREPATH)/BINARIES/4windows/SDL2_image/64/libpng16-16.dll $(PREPATH)/BINARIES/4windows/SDL2_image/64/libtiff-5.dll $(PREPATH)/BINARIES/4windows/SDL2_image/64/libwebp-4.dll $(PREPATH)/BINARIES/4windows/SDL2_image/64/zlib1.dll
#LUAINCLUDES = -I $(PREPATH)/lua/
#LUALIB = $(PREPATH)/lua/ -llua -lm

#Where to put the compiled program
COMPILEPATH = $(PREPATH)/BINARIES/



#Build options

build: NLF.o
    cp ./*.o $(COMPILEPATH)
    $(CC) $(CFLAGS) -shared -o $(COMPILEPATH)libNLF.dll $(SDL2LIBS) $(SDLIMAGE2LIBS) $(COMPILEPATH)*.o

NLF.o: NLF_osservice.o NLF_error.o NLF_screen.o NLF.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF.c
NLF.h.gch: NLF.h
    $(CC) $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF.h

NLF_osservice.o: NLF_osservice.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) NLF_osservice.c
NLF_osservice.h.gch:
    $(CC) $(CFLAGS) $(SDL2INCLUDES) NLF_osservice.h

NLF_error.o: NLF_error.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) NLF_error.c
NLF_error.h.gch:
    $(CC) $(CFLAGS) $(SDL2INCLUDES) NLF_error.h

NLF_screen.o: NLF_screen.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF_screen.c
NLF_screen.h.gch:
    $(CC) $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF_screen.h



#cleaning options

clean-build:
    rm -f -v $(COMPILEPATH)*.o

clean-all:
    rm -f -v ./*.o ./*.h.gch
    rm -f -v $(COMPILEPATH)*.o $(COMPILEPATH)*.so

clean-soft:
    rm -f -v ./*.o ./*.h.gch
    rm -f -v $(COMPILEPATH)*.o

当运行make all时，编译运行正常，但当它到达-shared部分时，我得到了这个：

../ BINARIES / 4windows / SDL2 / 64 / SDL2.dll：无法识别文件：

我尝试在第三方DLL之前添加-L，如下所示：

SDL2LIBS = -L $(PREPATH)/BINARIES/4windows/SDL2/64/SDL2.dll
SDLIMAGE2LIBS = -L $(PREPATH)/BINARIES/4windows/SDL2_image/64/SDL2_image.dll -L $(PREPATH)/BINARIES/4windows/SDL2_image/64/libjpeg-9.dll -L $(PREPATH)/BINARIES/4windows/SDL2_image/64/libpng16-16.dll -L $(PREPATH)/BINARIES/4windows/SDL2_image/64/libtiff-5.dll -L $(PREPATH)/BINARIES/4windows/SDL2_image/64/libwebp-4.dll -L $(PREPATH)/BINARIES/4windows/SDL2_image/64/zlib1.dll

然后我得到未定义的引用错误...... 如果我更改了该行，则会出现同样的错误：

$(CC) $(CFLAGS) -shared -o $(COMPILEPATH)libNLF.dll $(SDL2LIBS) $(SDLIMAGE2LIBS) $(COMPILEPATH)*.o

的

$(CC) $(CFLAGS) $(SDL2LIBS) $(SDLIMAGE2LIBS) -shared -o $(COMPILEPATH)libNLF.dll $(COMPILEPATH)*.o

有谁知道发生了什么？

Answer 1

您不应在库文件之前使用-L。 -L表示库路径。对于库文件，您应该使用-l（小写L）。但是，如果您指示文件的路径，并且包含文件扩展名，则不需要使用-l。所以初始Makefile在这个意义上是正确的。

您应该提供完整的错误，而不是just file not recognized:。我敢打赌这是一个file format not recognized错误，这可能表示你不应该链接.dll文件，而是.lib文件。 Similar problem here

Answer 2

我已经解决了!!这是怎么回事将这些文件放在SDL路径中：

libSDL2.a，libSDL2.dll.a，libSDL2main.a，libSDL2_test.a，SDL2.lib，SDL2main.lib和SDL2test.lib

这些与SDL_image一起。：

libSDL2_image.a和libSDL2_image.dll.a

这是Makefile：

#the compiler
CC = i686-w64-mingw32-gcc

#the standart ompilation flags of the project
CFLAGS = -O3 -Wall -Wno-unused-variable -Wno-unused-but-set-variable -Wno-implicit-function-declaration

#path to the folder's root, where the holy not build framework is. Relate to this Makefile
PREPATH = ..

#Path to the SDL, SDL_image and Lua includes and libs
SDL2INCLUDES = -I $DS(PREPATH)/SDL2/include
SDL2LIBS = -L$(PREPATH)/SDL2/4windows/SDL2/64 -lmingw32 -lSDL2main -lSDL2
SDLIMAGE2INCLUDES = -I $(PREPATH)/SDL2/SDL_image
SDLIMAGE2LIBS = -L$(PREPATH)/SDL2/4windows/SDL2_image/64 -lSDL2_image
#LUAINCLUDES = -I $(PREPATH)/lua/
#LUALIB = -L $(PREPATH)/lua/ -llua -lm

#Where to put the compiled program
COMPILEPATH = $(PREPATH)/BINARIES/



#Build options

build: NLF.o
    cp ./*.o $(COMPILEPATH)
    $(CC) $(CFLAGS) -shared $(COMPILEPATH)*.o $(SDL2LIBS) $(SDLIMAGE2LIBS) -o $(COMPILEPATH)libNLF.dll

NLF.o: NLF_osservice.o NLF_error.o NLF_screen.o NLF.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF.c
NLF.h.gch: NLF.h
    $(CC) $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF.h

NLF_osservice.o: NLF_osservice.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) NLF_osservice.c
NLF_osservice.h.gch:
    $(CC) $(CFLAGS) $(SDL2INCLUDES) NLF_osservice.h

NLF_error.o: NLF_error.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) NLF_error.c
NLF_error.h.gch:
    $(CC) $(CFLAGS) $(SDL2INCLUDES) NLF_error.h

NLF_screen.o: NLF_screen.h.gch
    $(CC) -c -DBUILD_DLL $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF_screen.c
NLF_screen.h.gch:
    $(CC) $(CFLAGS) $(SDL2INCLUDES) $(SDLIMAGE2INCLUDES) NLF_screen.h



#cleaning options

clean-build:
    rm -f -v $(COMPILEPATH)*.o

clean-all:
    rm -f -v ./*.o ./*.h.gch
    rm -f -v $(COMPILEPATH)*.o $(COMPILEPATH)*.dll

clean-soft:
    rm -f -v ./*.o ./*.h.gch
    rm -f -v $(COMPILEPATH)*.o

现在我的新问题是如何将所有这些东西编译成32位窗口。但这是另一个问题的陈述。

如何编译需要其他dll的dll

2 个答案: