用OpenEXR和Bazel？

Question

我想在Bazel项目中使用OpenEXR。

我的WORKSPACE.bazel看起来是这样的：

# OpenEXR
http_archive(
    name = "openexr",
    build_file = "//third_party:openexr.BUILD",
    sha256 = "53126a6a0d29f37336382f4d41afa8cc78b1958628e5e586469503c41af73f1d",
    strip_prefix = "openexr-2.2.0",
    urls = ["https://github.com/openexr/openexr/archive/v2.2.0.zip"],
)

我正在使用seurat提供的openexr.BUILD文件

在我的BUILD.bazel文件中，我创建一个测试目标：

cc_test(
    name = "TestOpenEXR",
    timeout = "short",
    srcs = [
        "test_openexr.cpp",
    ],
    deps = [
        "@googletest//:gtest_main",
        "@openexr//:half",
        "@openexr//:iex",
        "@openexr//:ilm_imf",
        "@openexr//:imath",
    ],
)

当我试图使用Ubuntu18.04和gcc 7.5.0使用Bazel (3.5.0) (bazel build)构建这个目标时，我得到以下错误：

BUILD.bazel:241:11: C++ compilation of rule '@openexr//:imath' failed (Exit 1) gcc failed: error executing command /usr/bin/gcc -U_FORTIFY_SOURCE -fstack-protector -Wall -Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer '-std=c++0x' -MD -MF ... (remaining 49 argument(s) skipped)

Use --sandbox_debug to see verbose messages from the sandbox
In file included from external/openexr/IlmBase/Imath/ImathBox.h:65:0,
                 from external/openexr/IlmBase/Imath/ImathBox.cpp:35:
external/openexr/IlmBase/Imath/ImathVec.h:228:34: error: ISO C++1z does not allow dynamic exception specifications
     const Vec2 & normalizeExc () throw (IEX_NAMESPACE::MathExc);
                                  ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:232:37: error: ISO C++1z does not allow dynamic exception specifications
     Vec2<T>  normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                     ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:440:34: error: ISO C++1z does not allow dynamic exception specifications
     const Vec3 & normalizeExc () throw (IEX_NAMESPACE::MathExc);
                                  ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:444:37: error: ISO C++1z does not allow dynamic exception specifications
     Vec3<T>  normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                     ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:622:37: error: ISO C++1z does not allow dynamic exception specifications
     const Vec4 &    normalizeExc () throw (IEX_NAMESPACE::MathExc);
                                     ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:626:44: error: ISO C++1z does not allow dynamic exception specifications
     Vec4<T>         normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                            ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:714:30: error: ISO C++1z does not allow dynamic exception specifications
 Vec2<short>::normalizeExc () throw (IEX_NAMESPACE::MathExc);
                              ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:723:37: error: ISO C++1z does not allow dynamic exception specifications
 Vec2<short>::normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                     ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:738:28: error: ISO C++1z does not allow dynamic exception specifications
 Vec2<int>::normalizeExc () throw (IEX_NAMESPACE::MathExc);
                            ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:747:35: error: ISO C++1z does not allow dynamic exception specifications
 Vec2<int>::normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                   ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:762:30: error: ISO C++1z does not allow dynamic exception specifications
 Vec3<short>::normalizeExc () throw (IEX_NAMESPACE::MathExc);
                              ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:771:37: error: ISO C++1z does not allow dynamic exception specifications
 Vec3<short>::normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                     ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:786:28: error: ISO C++1z does not allow dynamic exception specifications
 Vec3<int>::normalizeExc () throw (IEX_NAMESPACE::MathExc);
                            ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:795:35: error: ISO C++1z does not allow dynamic exception specifications
 Vec3<int>::normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                   ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:809:30: error: ISO C++1z does not allow dynamic exception specifications
 Vec4<short>::normalizeExc () throw (IEX_NAMESPACE::MathExc);
                              ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:818:37: error: ISO C++1z does not allow dynamic exception specifications
 Vec4<short>::normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                     ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:833:28: error: ISO C++1z does not allow dynamic exception specifications
 Vec4<int>::normalizeExc () throw (IEX_NAMESPACE::MathExc);
                            ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:842:35: error: ISO C++1z does not allow dynamic exception specifications
 Vec4<int>::normalizedExc () const throw (IEX_NAMESPACE::MathExc);
                                   ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:1212:26: error: ISO C++1z does not allow dynamic exception specifications
 Vec2<T>::normalizeExc () throw (IEX_NAMESPACE::MathExc)
                          ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:1249:33: error: ISO C++1z does not allow dynamic exception specifications
 Vec2<T>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)
                                 ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:1704:26: error: ISO C++1z does not allow dynamic exception specifications
 Vec3<T>::normalizeExc () throw (IEX_NAMESPACE::MathExc)
                          ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:1743:33: error: ISO C++1z does not allow dynamic exception specifications
 Vec3<T>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)
                                 ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:2109:26: error: ISO C++1z does not allow dynamic exception specifications
 Vec4<T>::normalizeExc () throw (IEX_NAMESPACE::MathExc)
                          ^~~~~
external/openexr/IlmBase/Imath/ImathVec.h:2150:33: error: ISO C++1z does not allow dynamic exception specifications
 Vec4<T>::normalizedExc () const throw (IEX_NAMESPACE::MathExc)
                                 ^~~~~
cc1plus: warning: unrecognized command line option '-Wno-deprecated-register'
cc1plus: warning: unrecognized command line option '-Wno-string-conversion'

我正在使用一个.bazelrc文件，它应该强制GCC使用C++17 (尽可能好；)：

build:gcc --cxxopt=-std=c++17

有什么办法可以避免C++1z的错误吗？

Answer 1

同时，我也解决了这个问题。基于seurat的生成文件文件，我采用了最新的主版本von，并开始修复所有问题。最后的BUILD.bazel在Ubuntu16.08 GCC、LLVM和Windows 10 VS2019上测试成功。

我为OpenEXR：https://github.com/Vertexwahn/openexr/tree/bazel创建了自己的bazel分支

Update OpenEXR现在拥有官方的Bazel支持。