使用 Emscripten 编译 Nim 和 SDL2 Image 时出现类型冲突

Question

我尝试编译一个使用 SDL2 Image 和 Emscripten 的 Nim 项目，但遇到几个类型冲突错误。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

当我编译此代码片段时，出现错误:类型冲突

$ 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);
                                    ^

我是否配置错误？我该如何修复它？

编辑:如果我从 nim.cfg 中删除 define = SDL_Static，我不会收到此错误，但如果我这样做，我无法静态链接到 SDL。

<小时/>

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

emcc(Emscripten gcc/clang 类替换)1.37.9(提交 b5bee629cb54864e7e231ae55a7d0ae9bdc25c6c)

Answer 1

这是一个 bug由 this 修复拉取请求。它应该在 sdl2 包的 1.2 版中发布。在此之前，您可以从存储库安装最新(开发)版本:

nimble install sdl2#head

将 --dynlibOverride:SDL2 静态链接到 Nim 编译器。