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我正在尝试为 Android 构建自定义 ROM。目前，我已经设置了我的构建环境并下载了源代码。

我正在遵循https://source.android.com/source/building#build-the-code上的说明

source build/envsetup.sh执行and时一切正常lunch，但执行时出现错误make：

external/libcxx/include/cmath:679:9: note: using declaration
using ::acos;
        ^
external/libcxx/include/cmath:684:46: error: declaration conflicts with target of using declaration already in scope
inline _LIBCPP_INLINE_VISIBILITY long double acos(long double __lcpp_x) _NOEXCEPT {return acosl(__lcpp_x);}
                                             ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/math.h:708:46: note: target of using declaration
inline _LIBCPP_INLINE_VISIBILITY long double acos(long double __lcpp_x) _NOEXCEPT {return ::acosl(__lcpp_x);}
                                             ^
external/libcxx/include/cmath:679:9: note: using declaration
using ::acos;
        ^
external/libcxx/include/cmath:690:1: error: declaration conflicts with target of using declaration already in scope
acos(_A1 __lcpp_x) _NOEXCEPT {return acos((double)__lcpp_x);}
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/math.h:714:1: note: target of using declaration
acos(_A1 __lcpp_x) _NOEXCEPT {return ::acos((double)__lcpp_x);}

fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
[  0% 163/43987] host C++: libprotobuf-cpp-full_32 <= external/protobuf/src/google/protobuf/descriptor.cc
ninja: build stopped: subcommand failed.
make: *** [ninja_wrapper] Error 1

#### make failed to build some targets (27 seconds) ####
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1 回答 1

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似乎它是由 xcode 9 引起的。请参阅https://forums.developer.apple.com/thread/87814。我也遇到过这个问题。我打算切换到 xcode 8.3。我已经用 xcode 8.3 和 sdk 10.11 编译了 android 7.1.2，没问题，没问题。

于 2017-10-08T17:41:33.447 回答