This is in cmake detection code though, the options you set for your build
have no bearing there right?
This looks like a bug in cmake to me, perhaps a newer cmake version can fix
it?
On Tue, May 2, 2017 at 3:24 AM Pavel Labath via lldb-dev <
lldb-dev@lists.llvm.org> wrote:
> What's the cmake command you are using?
>
> It sounds like you somehow ended up enabling -Werror, which is
> confusing the backtrace-detection code (and probably most of the other
> cmake compile checks).
>
> One of the workarounds would be to disable -Werror.
>
> pl
>
> On 28 April 2017 at 22:36, Andy Gibbs via lldb-dev
> <lldb-dev@lists.llvm.org> wrote:
> > Hi,
> >
> >
> > I am having a problem building the 4.0 release branch of LLDB on Debian
> > Stretch. Cmake returns the following fault:
> >
> >
> > -- LLDB version: 4.0.0
> > -- Found LibXml2: /usr/lib/x86_64-linux-gnu/libxml2.so (found version
> > "2.9.4")
> > -- Performing Test HAVE_PROCESS_VM_READV
> > -- Performing Test HAVE_PROCESS_VM_READV - Success
> > -- Found Curses: /usr/lib/x86_64-linux-gnu/libcurses.so
> > -- Looking for __GLIBCXX__
> > -- Looking for __GLIBCXX__ - found
> > -- Performing Test LLDB_USING_LIBSTDCXX_4_9
> > -- Performing Test LLDB_USING_LIBSTDCXX_4_9 - Success
> > -- Looking for backtrace
> > -- Looking for backtrace - not found
> > -- Could NOT find Backtrace (missing: Backtrace_LIBRARY)
> > -- Found Doxygen: /usr/bin/doxygen (found version "1.8.13")
> > -- Found SWIG: /usr/bin/swig3.0 (found version "3.0.10")
> > -- Performing Test CXX_SUPPORTS_NO_MACRO_REDEFINED
> > -- Performing Test CXX_SUPPORTS_NO_MACRO_REDEFINED - Success
> > -- Symbols (liblldb): exporting all symbols from the lldb namespace
> > CMake Error: The following variables are used in this project, but they
> > are set to NOTFOUND.
> > Please set them or make sure they are set and tested correctly in the
> > CMake files:
> > Backtrace_LIBRARY (ADVANCED)
> > linked by target "liblldb" in directory
> > clang-4.0/tools/lldb/source/API
> > linked by target "LLDBBreakpointTests" in directory
> > clang-4.0/tools/lldb/unittests/Breakpoint
> > linked by target "LLDBCoreTests" in directory
> > clang-4.0/tools/lldb/unittests/Core
> > linked by target "EditlineTests" in directory
> > clang-4.0/tools/lldb/unittests/Editline
> > linked by target "ExpressionTests" in directory
> > clang-4.0/tools/lldb/unittests/Expression
> > linked by target "HostTests" in directory
> > clang-4.0/tools/lldb/unittests/Host
> > linked by target "InterpreterTests" in directory
> > clang-4.0/tools/lldb/unittests/Interpreter
> > linked by target "LanguageCPlusPlusTests" in directory
> > clang-4.0/tools/lldb/unittests/Language/CPlusPlus
> > linked by target "LLDBPlatformTests" in directory
> > clang-4.0/tools/lldb/unittests/Platform
> > linked by target "ProcessGdbRemoteTests" in directory
> > clang-4.0/tools/lldb/unittests/Process/gdb-remote
> > linked by target "LLDBMinidumpTests" in directory
> > clang-4.0/tools/lldb/unittests/Process/minidump
> > linked by target "ScriptInterpreterPythonTests" in directory
> > clang-4.0/tools/lldb/unittests/ScriptInterpreter/Python
> > linked by target "SymbolTests" in directory
> > clang-4.0/tools/lldb/unittests/Symbol
> > linked by target "SymbolFileDWARFTests" in directory
> > clang-4.0/tools/lldb/unittests/SymbolFile/DWARF
> > linked by target "UnwindAssemblyx86Tests" in directory
> > clang-4.0/tools/lldb/unittests/UnwindAssembly/x86
> > linked by target "UtilityTests" in directory
> > clang-4.0/tools/lldb/unittests/Utility
> >
> > -- Configuring incomplete, errors occurred!
> > See also "build-4.0/bootstrap/CMakeFiles/CMakeOutput.log".
> > See also "build-4.0/bootstrap/CMakeFiles/CMakeError.log".
> >
> >
> >
> > The output from CMakeError.log is:
> >
> >
> > Determining if the backtrace exist failed with the following output:
> > Change Dir: build-4.0/bootstrap/CMakeFiles/CMakeTmp
> >
> > Run Build Command:"build-4.0/bin/ninja" "cmTC_1e735"
> > [1/2] Building C object CMakeFiles/cmTC_1e735.dir/CheckSymbolExists.c.o
> > FAILED: CMakeFiles/cmTC_1e735.dir/CheckSymbolExists.c.o
> > /usr/bin/cc -fPIC -Wall -W -Wno-unused-parameter -Wwrite-strings
> > -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-comment
> > -Werror -Werror=date-time -ffunction-sections -fdata-sections -o
> > CMakeFiles/cmTC_1e735.dir/CheckSymbolExists.c.o -c
> > build-4.0/bootstrap/CMakeFiles/CMakeTmp/CheckSymbolExists.c
> > build-4.0/bootstrap/CMakeFiles/CMakeTmp/CheckSymbolExists.c: In
> function
> > ‘main’:
> > build-4.0/bootstrap/CMakeFiles/CMakeTmp/CheckSymbolExists.c:8:11:
> error:
> > ISO C forbids conversion of function pointer to object pointer type
> > [-Werror=pedantic]
> > return ((int*)(&backtrace))[argc];
> > ^
> > cc1: all warnings being treated as errors
> > ninja: build stopped: subcommand failed.
> >
> > File build-4.0/bootstrap/CMakeFiles/CMakeTmp/CheckSymbolExists.c:
> > /* */
> > #include <execinfo.h>
> >
> > int main(int argc, char** argv)
> > {
> > (void)argv;
> > #ifndef backtrace
> > return ((int*)(&backtrace))[argc];
> > #else
> > (void)argc;
> > return 0;
> > #endif
> > }
> >
> >
> > It seems that the detection routine is invalid. The gcc in use is 6.3.0.
> > Anyone any idea how to fix / work around this problem?
> >
> >
> > Many thanks,
> >
> >
> > Andy
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > lldb-dev mailing list
> > lldb-dev@lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
> >
> _______________________________________________
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>
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