Hi Zachary,
Yeah, hardcoding support library here is sort of bad style here.
These three lines you mentioned previously are used to fix build issue with
lldb-platform which should be linked with LLVMSupport because
`llvm::Triple::getOSName()` is needed there. I think it was the problem from
`tools/lldb-platform`.
Cheers,
Chilledheart
```
[1/3] cd /Users/chilledheart/llvm-trunk/build-lldb/tools/lldb/scripts && echo -n
-n
[2/3] : && /usr/bin/clang++ -stdlib=libc++ -march=native
-fdiagnostics-format=vi -fdiagnostics-show-category=name -fcolor-diagnostics
-pedantic -Wall -Wextra -Wno-long-long -Wno-unused-parameter
-Woverloaded-virtual -stdlib=libc++ -march=native -fdiagnostics-format=vi
-fdiagnostics-show-category=name -fcolor-diagnostics -pedantic -Wall -Wextra
-Wno-long-long -Wno-unused-parameter -Woverloaded-virtual
-fno-omit-frame-pointer -g -O0 -std=c++11 -stdlib=libc++ -fPIC
-fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings
-Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long
-Wcovered-switch-default -std=c++11 -fcolor-diagnostics
-Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-deprecated-register
-fno-exceptions -fno-rtti -g -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk
-mmacosx-version-min=10.9 -Wl,-search_paths_first
-Wl,-headerpad_max_install_names -stdlib=libc++ -Wl,-de!
ad_strip
tools/lldb/tools/lldb-platform/CMakeFiles/lldb-platform.dir/lldb-platform.cpp.o
-o bin/lldb-platform-3.6.0 lib/liblldb.3.6.0.dylib lib/liblldbBreakpoint.a
lib/liblldbCommands.a lib/liblldbDataFormatters.a lib/liblldbHost.a
lib/liblldbCore.a lib/liblldbExpression.a lib/liblldbInterpreter.a
lib/liblldbSymbol.a lib/liblldbTarget.a lib/liblldbUtility.a
lib/liblldbPluginDisassemblerLLVM.a lib/liblldbPluginSymbolFileDWARF.a
lib/liblldbPluginSymbolFileSymtab.a lib/liblldbPluginDynamicLoaderStatic.a
lib/liblldbPluginDynamicLoaderPosixDYLD.a
lib/liblldbPluginDynamicLoaderHexagonDYLD.a lib/liblldbPluginObjectFileMachO.a
lib/liblldbPluginObjectFileELF.a lib/liblldbPluginObjectFileJIT.a
lib/liblldbPluginSymbolVendorELF.a lib/liblldbPluginObjectContainerBSDArchive.a
lib/liblldbPluginObjectContainerMachOArchive.a
lib/liblldbPluginProcessGDBRemote.a lib/liblldbPluginProcessMachCore.a
lib/liblldbPluginProcessUtility.a lib/liblldbPluginPlatformGDB.a
lib/liblldbPluginPlatformFreeB!
SD.a lib/liblldbPluginPlatformKalimba.a lib/liblldbPluginPlatformLinux..a
lib/liblldbPluginPlatformPOSIX.a lib/liblldbPluginPlatformWindows.a
lib/liblldbPluginPlatformMacOSX.a lib/liblldbPluginDynamicLoaderMacOSXDYLD.a
lib/liblldbPluginUnwindAssemblyInstEmulation.a
lib/liblldbPluginUnwindAssemblyX86.a lib/liblldbPluginAppleObjCRuntime.a
lib/liblldbPluginCXXItaniumABI.a lib/liblldbPluginABIMacOSX_arm.a
lib/liblldbPluginABIMacOSX_arm64.a lib/liblldbPluginABIMacOSX_i386.a
lib/liblldbPluginABISysV_x86_64.a lib/liblldbPluginABISysV_hexagon.a
lib/liblldbPluginABISysV_ppc.a lib/liblldbPluginABISysV_ppc64.a
lib/liblldbPluginInstructionARM.a lib/liblldbPluginInstructionARM64.a
lib/liblldbPluginObjectFilePECOFF.a lib/liblldbPluginOSPython.a
lib/liblldbPluginMemoryHistoryASan.a
lib/liblldbPluginInstrumentationRuntimeAddressSanitizer.a lib/liblldbAPI.a
lib/liblldbPluginDynamicLoaderDarwinKernel.a
lib/liblldbPluginProcessMacOSXKernel.a lib/liblldbPluginSymbolVendorMacOSX.a
lib/liblldbPluginSyste
mRuntimeMacOSX.a lib/liblldbPluginProcessElfCore.a lib/liblldbP!
luginJITLoaderGDB.a lib/libclangAnalysis.dylib lib/libclangAST.dylib
lib/libclangBasic.dylib lib/libclangCodeGen.dylib lib/libclangDriver.dylib
lib/libclangEdit.dylib lib/libclangFrontend.dylib lib/libclangLex.dylib
lib/libclangParse.dylib lib/libclangRewrite.dylib
lib/libclangRewriteFrontend.dylib lib/libclangSema.dylib
lib/libclangSerialization.dylib -Wl,-rpath,@executable_path/../lib && :
FAILED: : && /usr/bin/clang++ -stdlib=libc++ -march=native
-fdiagnostics-format=vi -fdiagnostics-show-category=name -fcolor-diagnostics
-pedantic -Wall -Wextra -Wno-long-long -Wno-unused-parameter
-Woverloaded-virtual -stdlib=libc++ -march=native -fdiagnostics-format=vi
-fdiagnostics-show-category=name -fcolor-diagnostics -pedantic -Wall -Wextra
-Wno-long-long -Wno-unused-parameter -Woverloaded-virtual
-fno-omit-frame-pointer -g -O0 -std=c++11 -stdlib=libc++ -fPIC
-fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter -Wwrite-strings
-Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long
-Wcovered-switch-default -std=c++11 -fcolor-diagnostics
-Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-deprecated-register
-fno-exceptions -fno-rtti -g -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk
-mmacosx-version-min=10.9 -Wl,-search_paths_first
-Wl,-headerpad_max_install_names -stdlib=libc++ -Wl,-!
dead_strip
tools/lldb/tools/lldb-platform/CMakeFiles/lldb-platform.dir/lldb-platform.cpp.o
-o bin/lldb-platform-3.6.0 lib/liblldb.3.6.0.dylib lib/liblldbBreakpoint.a
lib/liblldbCommands.a lib/liblldbDataFormatters.a lib/liblldbHost.a
lib/liblldbCore.a lib/liblldbExpression.a lib/liblldbInterpreter.a
lib/liblldbSymbol.a lib/liblldbTarget.a lib/liblldbUtility.a
lib/liblldbPluginDisassemblerLLVM.a lib/liblldbPluginSymbolFileDWARF.a
lib/liblldbPluginSymbolFileSymtab.a lib/liblldbPluginDynamicLoaderStatic.a
lib/liblldbPluginDynamicLoaderPosixDYLD.a
lib/liblldbPluginDynamicLoaderHexagonDYLD.a lib/liblldbPluginObjectFileMachO.a
lib/liblldbPluginObjectFileELF.a lib/liblldbPluginObjectFileJIT.a
lib/liblldbPluginSymbolVendorELF.a lib/liblldbPluginObjectContainerBSDArchive.a
lib/liblldbPluginObjectContainerMachOArchive.a
lib/liblldbPluginProcessGDBRemote.a lib/liblldbPluginProcessMachCore.a
lib/liblldbPluginProcessUtility.a lib/liblldbPluginPlatformGDB.a
lib/liblldbPluginPlatformFre!
eBSD.a lib/liblldbPluginPlatformKalimba.a lib/liblldbPluginPlatformLinux.a
lib/liblldbPluginPlatformPOSIX.a lib/liblldbPluginPlatformWindows.a
lib/liblldbPluginPlatformMacOSX.a lib/liblldbPluginDynamicLoaderMacOSXDYLD.a
lib/liblldbPluginUnwindAssemblyInstEmulation.a
lib/liblldbPluginUnwindAssemblyX86.a lib/liblldbPluginAppleObjCRuntime.a
lib/liblldbPluginCXXItaniumABI.a lib/liblldbPluginABIMacOSX_arm.a
lib/liblldbPluginABIMacOSX_arm64.a lib/liblldbPluginABIMacOSX_i386.a
lib/liblldbPluginABISysV_x86_64.a lib/liblldbPluginABISysV_hexagon.a
lib/liblldbPluginABISysV_ppc.a lib/liblldbPluginABISysV_ppc64.a
lib/liblldbPluginInstructionARM.a lib/liblldbPluginInstructionARM64.a
lib/liblldbPluginObjectFilePECOFF.a lib/liblldbPluginOSPython.a
lib/liblldbPluginMemoryHistoryASan.a
lib/liblldbPluginInstrumentationRuntimeAddressSanitizer.a lib/liblldbAPI.a
lib/liblldbPluginDynamicLoaderDarwinKernel.a
lib/liblldbPluginProcessMacOSXKernel.a lib/liblldbPluginSymbolVendorMacOSX.a
lib/liblldbPluginSyst
emRuntimeMacOSX.a lib/liblldbPluginProcessElfCore.a lib/liblld!
bPluginJITLoaderGDB.a lib/libclangAnalysis.dylib lib/libclangAST.dylib
lib/libclangBasic.dylib lib/libclangCodeGen.dylib lib/libclangDriver.dylib
lib/libclangEdit.dylib lib/libclangFrontend.dylib lib/libclangLex.dylib
lib/libclangParse.dylib lib/libclangRewrite.dylib
lib/libclangRewriteFrontend.dylib lib/libclangSema.dylib
lib/libclangSerialization.dylib -Wl,-rpath,@executable_path/../lib && :
Undefined symbols for architecture x86_64:
"llvm::Triple::getOSName() const", referenced from:
CreateProcessInfoResponse_DebugServerStyle(lldb_private::ProcessInstanceInfo
const&, lldb_private::StreamString&) in
liblldbPluginProcessGDBRemote.a(GDBRemoteCommunicationServer.cpp.o)
"llvm::Triple::getVendorName() const", referenced from:
CreateProcessInfoResponse_DebugServerStyle(lldb_private::ProcessInstanceInfo
const&, lldb_private::StreamString&) in
liblldbPluginProcessGDBRemote.a(GDBRemoteCommunicationServer.cpp.o)
"llvm::Triple::isArch64Bit() const", referenced from:
CreateProcessInfoResponse_DebugServerStyle(lldb_private::ProcessInstanceInfo
const&, lldb_private::StreamString&) in
liblldbPluginProcessGDBRemote.a(GDBRemoteCommunicationServer.cpp.o)
"llvm::Triple::isArch32Bit() const", referenced from:
CreateProcessInfoResponse_DebugServerStyle(lldb_private::ProcessInstanceInfo
const&, lldb_private::StreamString&) in
liblldbPluginProcessGDBRemote.a(GDBRemoteCommunicationServer.cpp.o)
"llvm::Triple::isArch16Bit() const", referenced from:
CreateProcessInfoResponse_DebugServerStyle(lldb_private::ProcessInstanceInfo
const&, lldb_private::StreamString&) in
liblldbPluginProcessGDBRemote.a(GDBRemoteCommunicationServer.cpp.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
ninja: build stopped: subcommand failed.
```
http://reviews.llvm.org/D6270
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