Hi,
I've tried to use the build-script but unfortunately I couldn't do this on the docker as it required to much space on disk 
.
I've also tried to install it on a laptop with the linux but after some time I ended up with this error:
./swift/utils/build-script --extra-cmake-options="-DBUILD_SHARED_LIBS=NO" --libdispatch -- --install-libdispatch
(...)
/Developer/swift/swift-source
symlinking the system headers (/usr/include/c++) into the local clang build directory (/home/mateusz/Developer/swift/swift-source/build/Ninja-DebugAssert/llvm-linux-x86_64/include).
+ ln -s -f /usr/include/c++ /home/mateusz/Developer/swift/swift-source/build/Ninja-DebugAssert/llvm-linux-x86_64/include
+ /usr/bin/cmake --build /home/mateusz/Developer/swift/swift-source/build/Ninja-DebugAssert/llvm-linux-x86_64 -- -j8 all
[2360/2837] Building CXX object tools/clang/lib/DirectoryWatcher/CMakeFiles/clangDirectoryWatcher.dir/DirectoryWatcher.cpp.o
/home/mateusz/Developer/swift/swift-source/llvm/tools/clang/lib/DirectoryWatcher/DirectoryWatcher.cpp:34:41: warning: unused function 'getModTime' [-Wunused-function]
static Optional<llvm::sys::TimePoint<>> getModTime(StringRef path) {
^
1 warning generated.
[2617/2837] Linking CXX executable bin/clang-6.0
FAILED: bin/clang-6.0
: && /usr/bin/clang++ -Wno-unknown-warning-option -Werror=unguarded-availability-new -g -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wcovered-switch-default -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wstring-conversion -fcolor-diagnostics -fno-common -Woverloaded-virtual -Wno-nested-anon-types -g -Wl,-allow-shlib-undefined -Wl,--export-dynamic -Wl,-rpath-link,/home/mateusz/Developer/swift/swift-source/build/Ninja-DebugAssert/llvm-linux-x86_64/./lib tools/clang/tools/driver/CMakeFiles/clang.dir/driver.cpp.o tools/clang/tools/driver/CMakeFiles/clang.dir/cc1_main.cpp.o tools/clang/tools/driver/CMakeFiles/clang.dir/cc1as_main.cpp.o tools/clang/tools/driver/CMakeFiles/clang.dir/apinotes_main.cpp.o tools/clang/tools/driver/CMakeFiles/clang.dir/cc1gen_reproducer_main.cpp.o -o bin/clang-6.0 lib/libLLVMX86CodeGen.a lib/libLLVMX86AsmParser.a lib/libLLVMX86AsmPrinter.a lib/libLLVMX86Desc.a lib/libLLVMX86Disassembler.a lib/libLLVMX86Info.a lib/libLLVMX86Utils.a lib/libLLVMARMCodeGen.a lib/libLLVMARMAsmParser.a lib/libLLVMARMAsmPrinter.a lib/libLLVMARMDesc.a lib/libLLVMARMDisassembler.a lib/libLLVMARMInfo.a lib/libLLVMARMUtils.a lib/libLLVMAArch64CodeGen.a lib/libLLVMAArch64AsmParser.a lib/libLLVMAArch64AsmPrinter.a lib/libLLVMAArch64Desc.a lib/libLLVMAArch64Disassembler.a lib/libLLVMAArch64Info.a lib/libLLVMAArch64Utils.a lib/libLLVMPowerPCCodeGen.a lib/libLLVMPowerPCAsmParser.a lib/libLLVMPowerPCAsmPrinter.a lib/libLLVMPowerPCDesc.a lib/libLLVMPowerPCDisassembler.a lib/libLLVMPowerPCInfo.a lib/libLLVMSystemZCodeGen.a lib/libLLVMSystemZAsmParser.a lib/libLLVMSystemZAsmPrinter.a lib/libLLVMSystemZDesc.a lib/libLLVMSystemZDisassembler.a lib/libLLVMSystemZInfo.a lib/libLLVMMipsCodeGen.a lib/libLLVMMipsAsmParser.a lib/libLLVMMipsAsmPrinter.a lib/libLLVMMipsDesc.a lib/libLLVMMipsDisassembler.a lib/libLLVMMipsInfo.a lib/libLLVMAnalysis.a lib/libLLVMCodeGen.a lib/libLLVMCore.a lib/libLLVMipo.a lib/libLLVMInstCombine.a lib/libLLVMInstrumentation.a lib/libLLVMMC.a lib/libLLVMMCParser.a lib/libLLVMObjCARCOpts.a lib/libLLVMOption.a lib/libLLVMScalarOpts.a lib/libLLVMSupport.a lib/libLLVMTransformUtils.a lib/libLLVMVectorize.a -lpthread lib/libclangBasic.a lib/libclangAPINotes.a lib/libclangCodeGen.a lib/libclangDriver.a lib/libclangFrontend.a lib/libclangFrontendTool.a lib/libLLVMX86AsmPrinter.a lib/libLLVMX86Utils.a lib/libLLVMARMDesc.a lib/libLLVMARMAsmPrinter.a lib/libLLVMARMUtils.a lib/libLLVMARMInfo.a lib/libLLVMGlobalISel.a lib/libLLVMAArch64Desc.a lib/libLLVMAArch64AsmPrinter.a lib/libLLVMAArch64Info.a lib/libLLVMAArch64Utils.a lib/libLLVMPowerPCAsmPrinter.a lib/libLLVMSystemZDesc.a lib/libLLVMSystemZAsmPrinter.a lib/libLLVMSystemZInfo.a lib/libLLVMAsmPrinter.a lib/libLLVMDebugInfoCodeView.a lib/libLLVMDebugInfoMSF.a lib/libLLVMSelectionDAG.a lib/libLLVMMipsAsmPrinter.a lib/libLLVMMCDisassembler.a lib/libclangCodeGen.a lib/libLLVMCoroutines.a lib/libLLVMCoverage.a lib/libLLVMLTO.a lib/libLLVMObjCARCOpts.a lib/libLLVMPasses.a lib/libLLVMCodeGen.a lib/libLLVMipo.a lib/libLLVMBitWriter.a lib/libLLVMIRReader.a lib/libLLVMAsmParser.a lib/libLLVMLinker.a lib/libLLVMInstrumentation.a lib/libLLVMScalarOpts.a lib/libLLVMInstCombine.a lib/libLLVMVectorize.a lib/libLLVMTransformUtils.a lib/libLLVMTarget.a lib/libLLVMAnalysis.a lib/libLLVMObject.a lib/libclangRewriteFrontend.a lib/libclangARCMigrate.a lib/libclangStaticAnalyzerFrontend.a lib/libclangStaticAnalyzerCheckers.a lib/libclangStaticAnalyzerCore.a lib/libclangCrossTU.a lib/libclangIndex.a lib/libclangFrontend.a lib/libclangDriver.a lib/libLLVMOption.a lib/libLLVMProfileData.a lib/libclangParse.a lib/libLLVMMCParser.a lib/libclangSerialization.a lib/libclangSema.a lib/libclangAPINotes.a lib/libLLVMBitReader.a lib/libclangAnalysis.a lib/libclangEdit.a lib/libclangFormat.a lib/libclangToolingCore.a lib/libclangRewrite.a lib/libclangASTMatchers.a lib/libclangAST.a lib/libclangLex.a lib/libclangBasic.a lib/libLLVMCore.a lib/libLLVMBinaryFormat.a lib/libLLVMMC.a lib/libLLVMSupport.a -lz -lrt -ldl -ltinfo -lpthread -lm lib/libLLVMDemangle.a -Wl,-rpath,"\$ORIGIN/../lib" && :
clang: error: unable to execute command: Killed
clang: error: linker command failed due to signal (use -v to see invocation)
[2624/2837] Linking CXX executable bin/clang-check
ninja: build stopped: subcommand failed.
./swift/utils/build-script: fatal error: command terminated with a non-zero exit status 1, aborting
Did I do something wrong? You mentioned: backport the changes. What do you mean by that?