我正在努力用cygwin编译SDL_Gfx。 配置脚本没有问题。
这是最后一个makefile命令：
/bin/sh ./libtool --tag=CC --mode=link gcc -g -O2 -I/usr/local/include/SDL2 -Dmain=SDL_main -no-undefined -release 1.0 -version-info 0:1:0 -o libSDL2_gfx.la -rpath /usr/local/lib SDL2_framerate.lo SDL2_gfxPrimitives.lo SDL2_imageFilter.lo SDL2_rotozoom.lo -L/usr/lib -lcygwin -lSDL2main -lSDL2
libtool: link: warning: library `/usr/lib/libSDL2.la' was moved.
这是链接器“警告”消息。
*** Warning: linker path does not have real file for library -lSDL2main.
*** I have the capability to make that library automatically link in when
*** you link to this library. But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libSDL2main and none of the candidates passed a file format test
*** using a file magic. Last file checked: /lib/libSDL2main.a
如果我试图忽略这一点，当我尝试在我的应用程序中使用该库时，我收到此错误：
In function `pixel':
/usr/local/lib/SDL2_gfx-1.0.1/SDL2_gfxPrimitives.c:75: undefined reference to `SDL_RenderDrawPoint'
/usr/local/lib/SDL2_gfx-1.0.1/SDL2_gfxPrimitives.c:75:(.text+0x11): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `SDL_RenderDrawPoint'
更新：我试图将编译器切换为使用mingw64而不是cywin。我有一个类似的问题，我认为这与libtool有关，因为我可以编译一个带有类似c / l标志的外部程序而没有问题。
我不知道我能尝试什么，我用完了想法，请帮忙。 谢谢