Comments (8)
few
commented on May 23, 2024
I found that this is a problem on my side. I had missing dependencies for lldb, but the build didn't fail. Now struggling with another failure:
llvm[2]: Linking Release+Asserts Shared Library liblldb.so
In function lldb_private::NativeProcessLinux::OperationArgs::OperationArgs(lldb_private::NativeProcessLinux*)': NativeProcessLinux.cpp:(.text._ZN12lldb_private18NativeProcessLinux13OperationArgsC2EPS0_+0x1a): undefined reference tosem_init'
Edit:
The other problem is described here:
http://lists.cs.uiuc.edu/pipermail/lldb-dev/2014-September/005194.html
I hacked around it by adding
LLVMLibsOptions += -lpthread
at the end of deps/llvm-svn/build_Release+Asserts/tools/lldb/lib/Makefile
from cxx.jl.
few
commented on May 23, 2024
Problem is not solved. Building lldb seemed to succeed, but using Cxx didn't work later on. The reason is that libcxxffi.so has undefined symbols from llvm. From the names of these symbols I guessed that they are related to threading. I guess lldb somehow requires llvm to be build with threads enabled, but julia disables them in (deps/Makefile). I'm now trying to build llvm with threads enabled.
from cxx.jl.
few
commented on May 23, 2024
It works now. There seem to be four problems.
1) llvm needs to be build without --disable-threads (required by lldb)
2) There are some new lldb libs missing from LLDB_LIBS in BuildBootstrap.Makefile
3) lldb requires ncurses
4) On ubuntu14.04 --as-needed is on by default, making the order of libs on the command line important.
Edit: Enabling threads is not necessary, but then you need to pass -lpthread while linking liblldb.so and libcxxffi.so.
Here is what I did:
diff --git a/deps/BuildBootstrap.Makefile b/deps/BuildBootstrap.Makefile
index 3a3eaf3..fd443fc 100644
--- a/deps/BuildBootstrap.Makefile
+++ b/deps/BuildBootstrap.Makefile
@@ -32,6 +32,7 @@ LLDB_LIBS = -llldbAPI -llldbBreakpoint -llldbCommands -llldbCore \
-llldbPluginInstrumentationRuntimeAddressSanitizer \
$(call exec,$(LLVM_CONFIG) --system-libs)
LLDB_LIBS += -llldbPluginABIMacOSX_arm -llldbPluginABIMacOSX_arm64 -llldbPluginABIMacOSX_i386
+LLDB_LIBS += -llldbPluginDynamicLoaderHexagon -llldbPluginABISysV_hexagon -llldbPluginDynamicLoaderMacOSX
ifeq ($(OS), Darwin)
LLDB_LIBS += -F/System/Library/Frameworks -F/System/Library/PrivateFrameworks -framework DebugSymbols -llldbHostMacOSX \
-llldbHostPOSIX \
@@ -45,14 +46,17 @@ ifeq ($(OS), WINNT)
LLDB_LIBS += -llldbHostWindows -llldbPluginProcessWindows -lWs2_32
endif
ifeq ($(OS), Linux)
-LLDB_LIBS += -llldbHostLinux -llldbPluginProcessLinux -llldbPluginProcessPOSIX
+LLDB_LIBS += -llldbHostLinux -llldbHostPosix -llldbPluginProcessLinux -llldbPluginProcessPOSIX -lncurses -lpanel -lrt -lpthread
endif
ifeq ($(USE_LLVM_SHLIB),1)
-LDFLAGS += -lLLVM-$(call exec,$(LLVM_CONFIG) --version)
+LLVM_LIBS = -lLLVM-$(call exec,$(LLVM_CONFIG) --version)
+else
+LLVM_LIBS =
endif
+LDFLAGS += -Wl,--no-undefined
all: usr/lib/libcxxffi.$(SHLIB_EXT) usr/lib/libcxxffi-debug.$(SHLIB_EXT)
@@ -68,7 +72,7 @@ build/bootstrap.o: ../src/bootstrap.cpp BuildBootstrap.Makefile | build
ifneq (,$(wildcard $(build_shlibdir)/libjulia.$(SHLIB_EXT)))
usr/lib/libcxxffi.$(SHLIB_EXT): build/bootstrap.o | usr/lib
- @$(call PRINT_LINK, $(CXX) -shared -fPIC $(JULIA_LDFLAGS) -ljulia $(LDFLAGS) -o $@ $(WHOLE_ARCHIVE) $(CLANG_LIBS) $(LLDB_LIBS) $(NO_WHOLE_ARCHIVE) $< )
+ @$(call PRINT_LINK, $(CXX) -shared -fPIC $(JULIA_LDFLAGS) $(LDFLAGS) -o $@ $(WHOLE_ARCHIVE) $(CLANG_LIBS) $(LLDB_LIBS) $(LLVM_LIBS) $(NO_WHOLE_ARCHIVE) $< -ljulia )
@cp usr/lib/libcxxffi.$(SHLIB_EXT) $(build_shlibdir)
else
usr/lib/libcxxffi.$(SHLIB_EXT):
from cxx.jl.
timholy
commented on May 23, 2024
@few, I ran into what I suspect is the same error:
julia> Pkg.build("Cxx")
INFO: Building Cxx
Tuning for julia installation at: /home/tim/src/julia/usr/bin
LINK /usr/local/julia/julia-packages/v0.4/Cxx/deps/usr/lib/libcxxffi.so
/home/tim/src/julia/usr/bin/../../usr/lib/liblldbPluginProcessGDBRemote.a(GDBRemoteCommunication.o): In function `GDBRemoteCommunication::StartDebugserverProcess(char const*, unsigned short, lldb_private::ProcessLaunchInfo&, unsigned short&)':
GDBRemoteCommunication.cpp:(.text._ZN22GDBRemoteCommunication23StartDebugserverProcessEPKctRN12lldb_private17ProcessLaunchInfoERt+0x620): warning: the use of `mktemp' is dangerous, better use `mkstemp' or `mkdtemp'
julia> using Cxx
ERROR: error compiling init: could not load module libcxxffi: libcxxffi: cannot open shared object file: No such file or directory
in include at ./boot.jl:242
in include_from_node1 at ./loading.jl:128
in reload_path at ./loading.jl:152
in _require at ./loading.jl:67
in require at ./loading.jl:52
in require4127 at /home/tim/src/julia/usr/bin/../lib/julia/sys.so
in print at ./string.jl
while loading /usr/local/julia/julia-packages/v0.4/Cxx/src/Cxx.jl, in expression starting on line 37
I made the changes described in your post above, but got this:
julia> Pkg.build("Cxx")
INFO: Building Cxx
Tuning for julia installation at: /home/tim/src/julia/usr/bin
CC /usr/local/julia/julia-packages/v0.4/Cxx/deps/build/bootstrap.o
LINK /usr/local/julia/julia-packages/v0.4/Cxx/deps/usr/lib/libcxxffi.so
/home/tim/src/julia/usr/bin/../../usr/lib/liblldbPluginProcessGDBRemote.a(GDBRemoteCommunication.o): In function `GDBRemoteCommunication::StartDebugserverProcess(char const*, unsigned short, lldb_private::ProcessLaunchInfo&, unsigned short&)':
GDBRemoteCommunication.cpp:(.text._ZN22GDBRemoteCommunication23StartDebugserverProcessEPKctRN12lldb_private17ProcessLaunchInfoERt+0x620): warning: the use of `mktemp' is dangerous, better use `mkstemp' or `mkdtemp'
/home/tim/src/julia/usr/bin/../../usr/lib/liblldbHostCommon.a(Editline.o): In function `std::_Sp_counted_ptr<lldb_private::line_editor::EditlineHistory*, (__gnu_cxx::_Lock_policy)2>::_M_dispose()':
Editline.cpp:(.text._ZNSt15_Sp_counted_ptrIPN12lldb_private11line_editor15EditlineHistoryELN9__gnu_cxx12_Lock_policyE2EE10_M_disposeEv[_ZNSt15_Sp_counted_ptrIPN12lldb_private11line_editor15EditlineHistoryELN9__gnu_cxx12_Lock_policyE2EE10_M_disposeEv]+0x34): undefined reference to `history'
Editline.cpp:(.text._ZNSt15_Sp_counted_ptrIPN12lldb_private11line_editor15EditlineHistoryELN9__gnu_cxx12_Lock_policyE2EE10_M_disposeEv[_ZNSt15_Sp_counted_ptrIPN12lldb_private11line_editor15EditlineHistoryELN9__gnu_cxx12_Lock_policyE2EE10_M_disposeEv]+0x41): undefined reference to `history_end'
/home/tim/src/julia/usr/bin/../../usr/lib/liblldbHostCommon.a(Editline.o): In function `lldb_private::Editline::IsEmacs()':
Editline.cpp:(.text._ZN12lldb_private8Editline7IsEmacsEv+0x14): undefined reference to `el_get'
...
I'm a build noob. Any insights?
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few
commented on May 23, 2024
@timholy: As Keno said in some other issue, you don't need lldb. I'd say the easiest way forward for you would be to remove
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Keno
commented on May 23, 2024
Seems like everything in this issue is resolved? If so, I'm gonna close this. Please open new issues for any specific new failures.
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few
commented on May 23, 2024
I didn't try the lldb part, but otherwise it works for me. Would you consider dropping the lldb dependency to speedup and simplify the installation for users?
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Keno
commented on May 23, 2024
Yes, that's not an unreasonable request. I'm planning to do something more standalone with lldb in the very near future, so I'll look into build options that allow lldb to use clang as built into this library, but without having to have them be in the same shared library.
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