如果 copts 不允许系统路径,如何引用外部依赖项使用的系统库?

Tre*_*key 8 c++ sdl bazel imgui

对于 Bazel,我正在从我的内部引入一个外部库WORKSPACE

new_http_archive(
      name = "imgui",
      build_file = "deps/BUILD.imgui",
      sha256 = "c457fdc19b4e3aa74deccf6a2d9bc51f0d470b3acd9cc095bf04df16459d6474",
      strip_prefix = 'imgui-1.62',
      url = "https://github.com/ocornut/imgui/archive/v1.62.tar.gz",
)
Run Code Online (Sandbox Code Playgroud)

在里面BUILD.imgui,我正在尝试构建它:

cc_library(
 name = "imgui_sdl_opengl3",
 linkopts = ["-ldl", "-lGL", "-L/usr/lib/x86_64-linux-gnu", "-lSDL2", "-lSDL"],
 copts = ["-Iexamples/", "-D_REENTRANT",],
 includes = [".","examples/libs/gl3w"],
 hdrs = [
     "examples/imgui_impl_opengl3.h",
     "examples/libs/gl3w/GL/gl3w.h",
     "examples/imgui_impl_sdl.h",
     "examples/libs/gl3w/GL/glcorearb.h",
 ],
 srcs = [
     "examples/imgui_impl_opengl3.cpp",
     "examples/imgui_impl_sdl.cpp",
     "examples/libs/gl3w/GL/gl3w.c",
 ],
)
Run Code Online (Sandbox Code Playgroud)

问题是找不到#include <SDL.h>
我尝试将其添加到科普特:

 copts = ["-Iexamples/", "-D_REENTRANT", "-I/usr/include/SDL"],
Run Code Online (Sandbox Code Playgroud)

但错误是:

The include path '/usr/include/SDL' references a path outside of the execution root.
Run Code Online (Sandbox Code Playgroud)

好的。同样的,如果我尝试将其添加到includes的参数cc_library

我尝试了另一个技巧,我看到您通过 Bazel 中的另一个存储库显示标题WORKSPACE,如下所示:

new_local_repository(
    name = "SDL",
    path = "/usr/include/SDL",
    build_file_content = """
package(
    default_visibility = [
        "//visibility:public",
    ],
)

cc_library(
    name = "headers",
    srcs = glob(["**/*.h"]),
)
""",
Run Code Online (Sandbox Code Playgroud)

问题是,如果我将该 repo 作为 deps 引用到我尝试构建的外部库,我会收到以下错误:

external/imgui/examples/imgui_impl_sdl.cpp:38:10: error: 'SDL.h' file not found with <angled> include; use "quotes" instead
#include <SDL.h>
         ^~~~~~~
         "SDL.h"
Run Code Online (Sandbox Code Playgroud)

当然,我不能将标题更改为那个,因为它不是我的标题。它来自我拉下来的外部库。

我该怎么办?
我不明白为什么我不能向 copt 添加系统路径(可能是密封原因)。我不知道如何包含路径并将它们作为系统标头访问。我也尝试了不同的东西-isystem,但看到了相同的错误。

Tre*_*key 1

正如 L\xc3\xa1szl\xc3\xb3 所说,您可以将 设置includes为当前目录,这将允许在其他代码中用作依赖项时将其检测为系统标头:

\n\n
cc_library(\n    ... \n    includes = [\n        ".",\n    ],\n)\n
Run Code Online (Sandbox Code Playgroud)\n