Question

我尝试编译一个使用SDM2 Image和Emscripten的Nim项目，但是我收到了几个冲突类型的错误。我可以在这个小代码片段中重现这个问题：

index.nim

import sdl2, sdl2.image

const imgFlags: cint = IMG_INIT_PNG
if image.init(imgFlags) != imgFlags:
  raise Exception.newException(
    "SDL2 Image initialization failed, SDL error: " & $getError())

nim.cfg

@if emscripten:
  define = SDL_Static
  gc = none
  cc = clang
  clang.exe = "emcc"
  clang.linkerexe = "emcc"
  clang.options.linker = ""
  cpu = "i386"
  out = "index.html"
  warning[GcMem] = off
  passC = "-Wno-warn-absolute-paths -I/path/to/SDL2/headers"
  passL = "-s USE_SDL=2 -s USE_SDL_IMAGE=2 -s SDL2_IMAGE_FORMATS='[\"png\"]'"
@end

当我编译此代码段时，出现错误：冲突类型

$ nim c -d:emscripten index.nim
Hint: used config file '/path/to/Nim/config/nim.cfg' [Conf]
Hint: used config file '/path/to/my-project/nim.cfg' [Conf]
Hint: system [Processing]
Hint: index [Processing]
Hint: sdl2 [Processing]
Hint: macros [Processing]
Hint: unsigned [Processing]
Hint: strutils [Processing]
Hint: parseutils [Processing]
Hint: math [Processing]
Hint: algorithm [Processing]
SDL2 will be statically linked. Please make sure you pass the correct linker flags (library search paths, linked libraries).
Hint: image [Processing]
CC: index
Error: execution of an external compiler program 'emcc -c -w -Wno-warn-absolute-paths -Iinclude  -I/path/to/Nim/lib -o /path/to/my-project/nimcache/index.o /path/to/my-project/nimcache/index.c' failed with exit code: 1

/path/to/my-project/nimcache/index.c:65:21: error: conflicting types for 'SDL_GetError'
N_NIMCALL(NCSTRING, SDL_GetError)(void);
                    ^
/path/to/SDL2/SDL_error.h:42:37: note: previous declaration is here
extern DECLSPEC const char *SDLCALL SDL_GetError(void);
                                    ^

我错误配置了什么吗？我该如何解决？

修改：如果我从 nim.cfg 中移除define = SDL_Static，我就不会收到此错误，但如果我这样做，我就不能SDL的静态链接。

Nim编译器版本0.16.1（2017-05-07）[Linux：amd64]（devel分支的最新版本）

emcc（Emscripten gcc / clang-like replacement）1.37.9（commit b5bee629cb54864e7e231ae55a7d0ae9bdc25c6c）

Answer 1

由bug拉取请求修复this。它应该在包sdl2的1.2版本中发布。然后，您可以从存储库安装最新（开发）版本：

nimble install sdl2#head

要将--dynlibOverride:SDL2静态传递给Nim编译器。

使用Emscripten编译Nim和SDL2映像时出现冲突类型

1 个答案: