0

我尝试编译一个将 SDL2 Image 与 Emscripten 结合使用的 Nim 项目，但我遇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：

索引.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())

尼姆.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

当我编译这个代码片段时，我得到一个错误：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);
                                    ^

我是否配置错误？我该如何解决？

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

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 替换）1.37.9（提交 b5bee629cb54864e7e231ae55a7d0ae9bdc25c6c）

4

1 回答 1

1

这是此拉取请求修复的错误。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

静态链接传递--dynlibOverride:SDL2给 Nim 编译器。

于 2017-06-02T14:12:26.777 回答