Swift源码编译环境配置

2020-12-13  本文已影响0人  分贝丶

编译环境

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

brew install cmake

brew install ninja

安装完成后 brew list 查看


image.png

编译步骤

第一步：clone swift源码（792.9M）
image.png 
git clone --branch swift-5.3.1-RELEASE https://github.com/apple/swift.git
第二步：update-checkout

确保你当前的目录是在上一步swift源码路
这步主要是clone编译swift相关的库，否则在编译时一定会失败，这步很关键！（llvm-project比较大2.41G，其他库很好不是很大，所以下载的时候需要耐心等待）

./swift/utils/update-checkout --tag swift-5.3.1-RELEASE --clone

这里编译需要注意一点：文件的路径尽量避免出现中文，中文有很大的概率会报错

第三步：采用ninja编译
./swift/utils/build-script -r --debug-swift-stdlib --lldb

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:325:9: error: no member named 'isless' in the global namespace
using ::isless;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:326:9: error: no member named 'islessequal' in the global namespace
using ::islessequal;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:327:9: error: no member named 'islessgreater' in the global namespace
using ::islessgreater;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:328:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:329:9: error: no member named 'isunordered' in the global namespace
using ::isunordered;
      ~~^
13 errors generated.
[5/910][  0%][9.914s] Building CXX obj...les/swiftImmediate.dir/Immediate.cpp.o
FAILED: lib/Immediate/CMakeFiles/swiftImmediate.dir/Immediate.cpp.o 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -DCMARK_STATIC_DEFINE -DGTEST_HAS_RTTI=0 -DHAVE_LIBEDIT -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Ilib/Immediate -I/Users/mwj/MWJ/Swift/swift-source/swift/lib/Immediate -Iinclude -I/Users/mwj/MWJ/Swift/swift-source/swift/include -I/Users/mwj/MWJ/Swift/swift-source/llvm-project/llvm/include -I/Users/mwj/MWJ/Swift/swift-source/build/Ninja-RelWithDebInfoAssert+stdlib-DebugAssert/llvm-macosx-x86_64/include -I/Users/mwj/MWJ/Swift/swift-source/llvm-project/clang/include -I/Users/mwj/MWJ/Swift/swift-source/build/Ninja-RelWithDebInfoAssert+stdlib-DebugAssert/llvm-macosx-x86_64/tools/clang/include -I/Users/mwj/MWJ/Swift/swift-source/cmark/src -I/Users/mwj/MWJ/Swift/swift-source/build/Ninja-RelWithDebInfoAssert+stdlib-DebugAssert/cmark-macosx-x86_64/src -isystem /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include -Wno-unknown-warning-option -Werror=unguarded-availability-new -fno-stack-protector -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -Wimplicit-fallthrough -Wcovered-switch-default -Wno-class-memaccess -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion -fdiagnostics-color -Werror=switch -Wdocumentation -Wimplicit-fallthrough -Wunreachable-code -Woverloaded-virtual -DOBJC_OLD_DISPATCH_PROTOTYPES=0 -O2  -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk   -UNDEBUG  -fno-exceptions -fno-rtti -Werror=gnu -target x86_64-apple-macosx10.9 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk -arch x86_64 -F/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk/../../../Developer/Library/Frameworks -mmacosx-version-min=10.9 -O2 -g -UNDEBUG -DSWIFT_ENABLE_RUNTIME_FUNCTION_COUNTERS -std=c++14 -MD -MT lib/Immediate/CMakeFiles/swiftImmediate.dir/Immediate.cpp.o -MF lib/Immediate/CMakeFiles/swiftImmediate.dir/Immediate.cpp.o.d -o lib/Immediate/CMakeFiles/swiftImmediate.dir/Immediate.cpp.o -c /Users/mwj/MWJ/Swift/swift-source/swift/lib/Immediate/Immediate.cpp

sudo rm -rf /Library/Developer/CommandLineTools
sudo xcode-select -s /Applications/Xcode.app

执行完上述命令后重新编译

第四步：使用VSCode调试Swift

需要注意的是program的路径需要与你编译的文件路径一致

{
    "version": "0.2.0",
    "configurations": [

        {
            "type": "lldb",
            "request": "launch",
            "name": "Debug",
            "program": "${workspaceFolder}/build/Ninja-RelWithDebInfoAssert+stdlib-DebugAssert/swift-macosx-x86_64/bin/swift",
            "args": [],
            "cwd": "${workspaceFolder}"
        }
    ]
}

Launching: /Users/mwj/MWJ/Swift/swift-source/build/Ninja-RelWithDebInfoAssert+stdlib-DebugAssert/swift-macosx-x86_64/bin/swift

Launched process 10939

Stop reason: exec


[1,2,3,4].forEach { print($0) }
image.png

可以看到本地变量没有任何显示（原因是CodeLLDB这个插件的作者没有支持swift语言），当然并不妨碍调试源代码。到这里就可以😸调试源码！
需要显示本地变量的朋友可以继续往下看。☞

本地变量显示支持Swift

分析：LLDBCode本质上也是使用bin目录下的LLDB来调试我们的源码。

/Users/***/.vscode/extensions/vadimcn.vscode-lldb-1.6.0/lldb/bin
image.png 
/Users/***/***/swift-source/build/Ninja-RelWithDebInfoAssert+stdlib-DebugAssert/lldb-macosx-x86_64/bin
image.png image.png

第四步：重启VSCode再次Debug下面看到变量了。

image.png
，

编译总结：

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