[lldb-dev] Building LLDB when LLVM is built with threading disabled

Sat Sep 13 13:43:42 PDT 2014

I unfortunately don't currently have the time to do a bisect, but I'll
submit a patch soon to simply add -lpthread to the link line.

On Wed, Sep 10, 2014 at 4:04 PM, Zachary Turner <zturner at google.com> wrote:
> It sounds to me like you simply need to link in libpthread.   "LLVM with
> threading enabled" is a very confusing thing.  Compiling LLVM with
> "threading disabled" DOES NOT mean that you promise your application will be
> single-threaded.  It only means that you agree that a very specific subset
> of operations will not be thread-safe.  If someone is deciding whether to
> link libpthread based on the value of LLVM_ENABLE_THREADING, that right
> there is a bug, because the two are independent.  LLDB always needs to link
> libpthread.
>
> That said, it might be interesting just to know why this broke recently.  In
> that case, you can use the "git bisect" command to track down the offending
> changelist.
>
> On Wed, Sep 10, 2014 at 10:09 AM, Keno Fischer
> <kfischer at college.harvard.edu> wrote:
>>
>> This is copied from a user who sent me his error message, but I saw
>> the same (the errors can be fixed by linking in -lpthread manually, so
>> it's probably just a make system issue):
>>
>> llvm[6]: Linking Release+Asserts Shared Library liblldb.so
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbExpression.a(ClangExpressionParser.o):
>> In function
>> `lldb_private::ClangExpressionParser::Parse(lldb_private::Stream&)':
>>
>> ClangExpressionParser.cpp:(.text._ZN12lldb_private21ClangExpressionParser5ParseERNS_6StreamE+0x397):
>> warning: the use of `mktemp' is dangerous, better use `mkstemp' or
>> `mkdtemp'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function
>> `lldb_private::NativeProcessLinux::OperationArgs::OperationArgs(lldb_private::NativeProcessLinux*)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux13OperationArgsC2EPS0_+0x1a):
>> undefined reference to `sem_init'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function
>> `lldb_private::NativeProcessLinux::OperationArgs::~OperationArgs()':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux13OperationArgsD2Ev+0x9):
>> undefined reference to `sem_destroy'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function
>> `lldb_private::NativeProcessLinux::ServeOperation(lldb_private::NativeProcessLinux::OperationArgs*)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14ServeOperationEPNS0_13OperationArgsE+0xd):
>> undefined reference to `sem_post'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14ServeOperationEPNS0_13OperationArgsE+0x24):
>> undefined reference to `sem_wait'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14ServeOperationEPNS0_13OperationArgsE+0x6c):
>> undefined reference to `sem_post'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function `lldb_private::NativeProcessLinux::DoOperation(void*)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux11DoOperationEPv+0x36):
>> undefined reference to `sem_post'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux11DoOperationEPv+0x4e):
>> undefined reference to `sem_wait'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function `lldb_private::NativeProcessLinux::StopMonitor()':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux11StopMonitorEv+0x19):
>> undefined reference to `sem_destroy'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux11StopMonitorEv+0x26):
>> undefined reference to `sem_destroy'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function
>> `lldb_private::NativeProcessLinux::LaunchInferior(lldb_private::Module*,
>> char const**, char const**, char const*, char const*, char const*,
>> char const*, lldb_private::ProcessLaunchInfo const&,
>> lldb_private::Error&)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14LaunchInferiorEPNS_6ModuleEPPKcS5_S4_S4_S4_S4_RKNS_17ProcessLaunchInfoERNS_5ErrorE+0xd1):
>> undefined reference to `sem_init'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14LaunchInferiorEPNS_6ModuleEPPKcS5_S4_S4_S4_S4_RKNS_17ProcessLaunchInfoERNS_5ErrorE+0xe1):
>> undefined reference to `sem_init'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14LaunchInferiorEPNS_6ModuleEPPKcS5_S4_S4_S4_S4_RKNS_17ProcessLaunchInfoERNS_5ErrorE+0x116):
>> undefined reference to `sem_wait'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function `lldb_private::NativeProcessLinux::AttachToInferior(unsigned
>> long, lldb_private::Error&)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux16AttachToInferiorEmRNS_5ErrorE+0x1bb):
>> undefined reference to `sem_init'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux16AttachToInferiorEmRNS_5ErrorE+0x1cc):
>> undefined reference to `sem_init'
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux16AttachToInferiorEmRNS_5ErrorE+0x222):
>> undefined reference to `sem_wait'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function `lldb_private::NativeProcessLinux::LaunchOpThread(void*)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14LaunchOpThreadEPv+0x25):
>> undefined reference to `sem_post'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(NativeProcessLinux.o):
>> In function `lldb_private::NativeProcessLinux::AttachOpThread(void*)':
>>
>> NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux14AttachOpThreadEPv+0x25):
>> undefined reference to `sem_post'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function
>> `ProcessMonitor::OperationArgs::OperationArgs(ProcessMonitor*)':
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor13OperationArgsC2EPS_+0x1a):
>> undefined reference to `sem_init'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::OperationArgs::~OperationArgs()':
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor13OperationArgsD2Ev+0x9):
>> undefined reference to `sem_destroy'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function
>> `ProcessMonitor::ServeOperation(ProcessMonitor::OperationArgs*)':
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor14ServeOperationEPNS_13OperationArgsE+0xd):
>> undefined reference to `sem_post'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor14ServeOperationEPNS_13OperationArgsE+0x24):
>> undefined reference to `sem_wait'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor14ServeOperationEPNS_13OperationArgsE+0x69):
>> undefined reference to `sem_post'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::DoOperation(Operation*)':
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor11DoOperationEP9Operation+0x2a):
>> undefined reference to `sem_post'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor11DoOperationEP9Operation+0x3e):
>> undefined reference to `sem_wait'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::StopMonitor()':
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor11StopMonitorEv+0x16):
>> undefined reference to `sem_destroy'
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor11StopMonitorEv+0x20):
>> undefined reference to `sem_destroy'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::ProcessMonitor(ProcessPOSIX*,
>> lldb_private::Module*, char const**, char const**, char const*, char
>> const*, char const*, char const*, lldb_private::ProcessLaunchInfo
>> const&, lldb_private::Error&)':
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitorC2EP12ProcessPOSIXPN12lldb_private6ModuleEPPKcS7_S6_S6_S6_S6_RKNS2_17ProcessLaunchInfoERNS2_5ErrorE+0xd3):
>> undefined reference to `sem_init'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitorC2EP12ProcessPOSIXPN12lldb_private6ModuleEPPKcS7_S6_S6_S6_S6_RKNS2_17ProcessLaunchInfoERNS2_5ErrorE+0xe0):
>> undefined reference to `sem_init'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitorC2EP12ProcessPOSIXPN12lldb_private6ModuleEPPKcS7_S6_S6_S6_S6_RKNS2_17ProcessLaunchInfoERNS2_5ErrorE+0x116):
>> undefined reference to `sem_wait'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::ProcessMonitor(ProcessPOSIX*, unsigned
>> long, lldb_private::Error&)':
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitorC2EP12ProcessPOSIXmRN12lldb_private5ErrorE+0x50):
>> undefined reference to `sem_init'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitorC2EP12ProcessPOSIXmRN12lldb_private5ErrorE+0x5d):
>> undefined reference to `sem_init'
>>
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitorC2EP12ProcessPOSIXmRN12lldb_private5ErrorE+0xae):
>> undefined reference to `sem_wait'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::LaunchOpThread(void*)':
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor14LaunchOpThreadEPv+0x25):
>> undefined reference to `sem_post'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbPluginProcessLinux.a(ProcessMonitor.o):
>> In function `ProcessMonitor::AttachOpThread(void*)':
>> ProcessMonitor.cpp:(.text._ZN14ProcessMonitor14AttachOpThreadEPv+0x25):
>> undefined reference to `sem_post'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `MonitorChildProcessThreadFunction(void*)':
>> Host.cpp:(.text._ZL33MonitorChildProcessThreadFunctionPv+0xf3):
>> undefined reference to `pthread_testcancel'
>> Host.cpp:(.text._ZL33MonitorChildProcessThreadFunctionPv+0x10b):
>> undefined reference to `pthread_testcancel'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadCreate(char const*, void*
>> (*)(void*), void*, lldb_private::Error*)':
>>
>> Host.cpp:(.text._ZN12lldb_private4Host12ThreadCreateEPKcPFPvS3_ES3_PNS_5ErrorE+0x63):
>> undefined reference to `pthread_create'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadCancel(unsigned long,
>> lldb_private::Error*)':
>> Host.cpp:(.text._ZN12lldb_private4Host12ThreadCancelEmPNS_5ErrorE+0xa):
>> undefined reference to `pthread_cancel'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadDetach(unsigned long,
>> lldb_private::Error*)':
>> Host.cpp:(.text._ZN12lldb_private4Host12ThreadDetachEmPNS_5ErrorE+0xa):
>> undefined reference to `pthread_detach'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadJoin(unsigned long, void**,
>> lldb_private::Error*)':
>> Host.cpp:(.text._ZN12lldb_private4Host10ThreadJoinEmPPvPNS_5ErrorE+0xa):
>> undefined reference to `pthread_join'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadLocalStorageCreate(void
>> (*)(void*))':
>>
>> Host.cpp:(.text._ZN12lldb_private4Host24ThreadLocalStorageCreateEPFvPvE+0xd):
>> undefined reference to `pthread_key_create'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadLocalStorageGet(unsigned int)':
>> Host.cpp:(.text._ZN12lldb_private4Host21ThreadLocalStorageGetEj+0x1):
>> undefined reference to `pthread_getspecific'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Host.o):
>> In function `lldb_private::Host::ThreadLocalStorageSet(unsigned int,
>> void*)':
>> Host.cpp:(.text._ZN12lldb_private4Host21ThreadLocalStorageSetEjPv+0x1):
>> undefined reference to `pthread_setspecific'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Mutex.o):
>> In function `lldb_private::Mutex::Mutex(lldb_private::Mutex::Type)':
>> Mutex.cpp:(.text._ZN12lldb_private5MutexC2ENS0_4TypeE+0x4c): undefined
>> reference to `pthread_mutexattr_init'
>> Mutex.cpp:(.text._ZN12lldb_private5MutexC2ENS0_4TypeE+0x7a): undefined
>> reference to `pthread_mutexattr_destroy'
>> Mutex.cpp:(.text._ZN12lldb_private5MutexC2ENS0_4TypeE+0xa9): undefined
>> reference to `pthread_mutexattr_settype'
>> Mutex.cpp:(.text._ZN12lldb_private5MutexC2ENS0_4TypeE+0xd6): undefined
>> reference to `pthread_mutexattr_settype'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(Mutex.o):
>> In function `lldb_private::Mutex::TryLock(char const*)':
>> Mutex.cpp:(.text._ZN12lldb_private5Mutex7TryLockEPKc+0x1): undefined
>> reference to `pthread_mutex_trylock'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::ProcessRunLock()':
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLockC2Ev+0x7):
>> undefined reference to `pthread_rwlock_init'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::~ProcessRunLock()':
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLockD2Ev+0x1):
>> undefined reference to `pthread_rwlock_destroy'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::ReadTryLock()':
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock11ReadTryLockEv+0x5):
>> undefined reference to `pthread_rwlock_rdlock'
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock11ReadTryLockEv+0x24):
>> undefined reference to `pthread_rwlock_unlock'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::ReadUnlock()':
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock10ReadUnlockEv+0x5):
>> undefined reference to `pthread_rwlock_unlock'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::SetRunning()':
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock10SetRunningEv+0x5):
>> undefined reference to `pthread_rwlock_wrlock'
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock10SetRunningEv+0x11):
>> undefined reference to `pthread_rwlock_unlock'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::TrySetRunning()':
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock13TrySetRunningEv+0xa):
>> undefined reference to `pthread_rwlock_trywrlock'
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock13TrySetRunningEv+0x20):
>> undefined reference to `pthread_rwlock_unlock'
>>
>> /mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldbHostCommon.a(ProcessRunLock.o):
>> In function `lldb_private::ProcessRunLock::SetStopped()':
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock10SetStoppedEv+0x5):
>> undefined reference to `pthread_rwlock_wrlock'
>>
>> ProcessRunLock.cpp:(.text._ZN12lldb_private14ProcessRunLock10SetStoppedEv+0x11):
>> undefined reference to `pthread_rwlock_unlock'
>> collect2: error: ld returned 1 exit status
>> make[6]: ***
>> [/mnt/hdd/mlubin/julia-0.4/deps/llvm-svn/build_Release+Asserts/Release+Asserts/lib/liblldb.so]
>> Error 1
>>
>> On Wed, Sep 10, 2014 at 1:00 PM, Zachary Turner <zturner at google.com>
>> wrote:
>> > Threading should be enabled by default in LLVM, you have to go out of
>> > your
>> > way to disable it.
>> >
>> >
>> > On Tue, Sep 9, 2014 at 5:12 PM, Greg Clayton <gclayton at apple.com> wrote:
>> >>
>> >> Because LLVM enables threading manually, this is the main reason we
>> >> didn't
>> >> use their locking primitives.
>> >>
>> >> I am not sure if we recently started using any of LLVM threading stuff
>> >> that gets disabled (Zach's changes?) when threading isn't enabled in
>> >> LLVM,
>> >> but I don't believe we have enabled threading in LLVM builds.
>> >>
>> >> Can you elaborate on what is making the build fail now after you
>> >> disable
>> >> threads?
>> >>
>> >> > On Sep 9, 2014, at 4:50 PM, Keno Fischer
>> >> > <kfischer at college.harvard.edu>
>> >> > wrote:
>> >> >
>> >> > We build LLVM with threads disabled by default (using
>> >> > make&configure).
>> >> > Recently this started causing the LLDB build to fail. I'm not sure if
>> >> > this is because of changes to LLDB or the LLVM build system in
>> >> > general
>> >> > but it brings me to two questions. First, is it now necessary to
>> >> > build
>> >> > LLVM with threads enabled to build LLDB? And, second, if not, is it
>> >> > reasonable to link in pthread even when --disable-threads is passed
>> >> > to
>> >> > ./configure, since I don't believe LLDB can be built without
>> >> > threading
>> >> > support entirely?
>> >> >
>> >> > Thanks,
>> >> > Keno
>> >> > _______________________________________________
>> >> > lldb-dev mailing list
>> >> > lldb-dev at cs.uiuc.edu
>> >> > http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>> >>
>> >> _______________________________________________
>> >> lldb-dev mailing list
>> >> lldb-dev at cs.uiuc.edu
>> >> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
>> >
>> >
>
>