Error in Building Cppinsights

[praveen-velliengiri]

Hi @andreasfertig
I'm having trouble while installing cppinsights in my machine. I have summarised in this StackOverflow post about my problem. I don't know exactly what was the cause of this problem. I still think this was an issue with respect to my system, could you please help me to build cppinsights 👍

I will close this, once I get it properly installed.
Thanks

[andreasfertig]

Hello preejackie,

it looks like llvm-config does return something the build system does not expect. Can you confirm that the following file exists:

/home/praveen/llvm-novice/llvm/include/clang/AST/AST.h

It is also suspicious that llvm_config(LLVM_SYSTEM_LIBS)=>; is empty. Usually it looks like this:

llvm_config(LLVM_SYSTEM_LIBS)=>-lz -lrt -ldl -ltinfo -lpthread -lm;

Can you also post the output of

make VERBOSE=1

[praveen-velliengiri]

Hi @andreasfertig
AST.h doesn't exist in /home/praveen/llvm-novice/llvm/include/clang/AST/AST.h but instead it is in this directory /home/praveen/llvm-novice/llvm/tools/clang/include/clang/AST.

Building make files command:

cmake ../cppinsights -DCMAKE_CXX_COMPILER=/home/praveen/ninja/bin/clang++ -DCMAKE_PREFIX_PATH=/home/praveen/ninja/bin

-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is Clang 6.0.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /home/praveen/ninja/bin/clang++
-- Check for working CXX compiler: /home/praveen/ninja/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found LLVM_CONFIG_PATH: /home/praveen/ninja/bin/llvm-config
-- llvm_config(LLVM_CXXFLAGS)=>-isystem/home/praveen/llvm-novice/llvm/include -isystem/home/praveen/ninja/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O3 -fno-exceptions -fno-rtti -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS;
-- llvm_config(LLVM_LDFLAGS)=>-L/home/praveen/ninja/lib;
-- llvm_config(LLVM_LIBS)=>-lLLVMLTO -lLLVMPasses -lLLVMObjCARCOpts -lLLVMMIRParser -lLLVMSymbolize -lLLVMDebugInfoPDB -lLLVMDebugInfoDWARF -lLLVMCoverage -lLLVMTableGen -lLLVMDlltoolDriver -lLLVMOrcJIT -lLLVMTestingSupport -lLLVMXCoreDisassembler -lLLVMXCoreCodeGen -lLLVMXCoreDesc -lLLVMXCoreInfo -lLLVMXCoreAsmPrinter -lLLVMSystemZDisassembler -lLLVMSystemZCodeGen -lLLVMSystemZAsmParser -lLLVMSystemZDesc -lLLVMSystemZInfo -lLLVMSystemZAsmPrinter -lLLVMSparcDisassembler -lLLVMSparcCodeGen -lLLVMSparcAsmParser -lLLVMSparcDesc -lLLVMSparcInfo -lLLVMSparcAsmPrinter -lLLVMPowerPCDisassembler -lLLVMPowerPCCodeGen -lLLVMPowerPCAsmParser -lLLVMPowerPCDesc -lLLVMPowerPCInfo -lLLVMPowerPCAsmPrinter -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMNVPTXAsmPrinter -lLLVMMSP430CodeGen -lLLVMMSP430Desc -lLLVMMSP430Info -lLLVMMSP430AsmPrinter -lLLVMMipsDisassembler -lLLVMMipsCodeGen -lLLVMMipsAsmParser -lLLVMMipsDesc -lLLVMMipsInfo -lLLVMMipsAsmPrinter -lLLVMLanaiDisassembler -lLLVMLanaiCodeGen -lLLVMLanaiAsmParser -lLLVMLanaiDesc -lLLVMLanaiAsmPrinter -lLLVMLanaiInfo -lLLVMHexagonDisassembler -lLLVMHexagonCodeGen -lLLVMHexagonAsmParser -lLLVMHexagonDesc -lLLVMHexagonInfo -lLLVMBPFDisassembler -lLLVMBPFCodeGen -lLLVMBPFAsmParser -lLLVMBPFDesc -lLLVMBPFInfo -lLLVMBPFAsmPrinter -lLLVMARMDisassembler -lLLVMARMCodeGen -lLLVMARMAsmParser -lLLVMARMDesc -lLLVMARMInfo -lLLVMARMAsmPrinter -lLLVMARMUtils -lLLVMAMDGPUDisassembler -lLLVMAMDGPUCodeGen -lLLVMAMDGPUAsmParser -lLLVMAMDGPUDesc -lLLVMAMDGPUInfo -lLLVMAMDGPUAsmPrinter -lLLVMAMDGPUUtils -lLLVMAArch64Disassembler -lLLVMAArch64CodeGen -lLLVMAArch64AsmParser -lLLVMAArch64Desc -lLLVMAArch64Info -lLLVMAArch64AsmPrinter -lLLVMAArch64Utils -lLLVMObjectYAML -lLLVMLibDriver -lLLVMOption -lgtest_main -lgtest -lLLVMWindowsManifest -lLLVMFuzzMutate -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMDebugInfoCodeView -lLLVMDebugInfoMSF -lLLVMX86Desc -lLLVMMCDisassembler -lLLVMX86Info -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMMCJIT -lLLVMLineEditor -lLLVMInterpreter -lLLVMExecutionEngine -lLLVMRuntimeDyld -lLLVMCodeGen -lLLVMTarget -lLLVMCoroutines -lLLVMipo -lLLVMInstrumentation -lLLVMVectorize -lLLVMScalarOpts -lLLVMLinker -lLLVMIRReader -lLLVMAsmParser -lLLVMInstCombine -lLLVMTransformUtils -lLLVMBitWriter -lLLVMAnalysis -lLLVMProfileData -lLLVMObject -lLLVMMCParser -lLLVMMC -lLLVMBitReader -lLLVMCore -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle;
-- llvm_config(LLVM_LIBDIR)=>/home/praveen/ninja/lib;
-- llvm_config(LLVM_INCLUDE_DIR)=>/home/praveen/llvm-novice/llvm/include;
-- llvm_config(LLVM_SYSTEM_LIBS)=>;
-- llvm_config(LLVM_PACKAGE_VERSION)=>6.0.0svn;
-- Git repo url: https://github.com/andreasfertig/cppinsights.git
-- Git commit hash: 5ce053d
-- Generating version.h
-- Found clang-tidy: /home/praveen/ninja/bin/clang-tidy
-- Stripping executable
-- Found Doxygen: /usr/local/bin/doxygen (found version "1.8.14") found components: doxygen dot
-- Using CXX: /home/praveen/ninja/bin/clang++
-- Configuring done
-- Generating don
-- Build files have been written to: /home/praveen/cppinsight/build_00

The output of make VERBOSE=1 is

/usr/local/bin/cmake -H/home/praveen/cppinsight/cppinsights -B/home/praveen/cppinsight/build_00 --check-build-system CMakeFiles/Makefile.cmake 0
/usr/local/bin/cmake -E cmake_progress_start /home/praveen/cppinsight/build_00/CMakeFiles /home/praveen/cppinsight/build_00/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory '/home/praveen/cppinsight/build_00'
make -f CMakeFiles/insights.dir/build.make CMakeFiles/insights.dir/depend
make[2]: Entering directory '/home/praveen/cppinsight/build_00'
cd /home/praveen/cppinsight/build_00 && /usr/local/bin/cmake -E cmake_depends "Unix Makefiles" /home/praveen/cppinsight/cppinsights /home/praveen/cppinsight/cppinsights /home/praveen/cppinsight/build_00 /home/praveen/cppinsight/build_00 /home/praveen/cppinsight/build_00/CMakeFiles/insights.dir/DependInfo.cmake --color=
Dependee "/home/praveen/cppinsight/build_00/CMakeFiles/insights.dir/DependInfo.cmake" is newer than depender "/home/praveen/cppinsight/build_00/CMakeFiles/insights.dir/depend.internal".
Dependee "/home/praveen/cppinsight/build_00/CMakeFiles/CMakeDirectoryInformation.cmake" is newer than depender "/home/praveen/cppinsight/build_00/CMakeFiles/insights.dir/depend.internal".
Scanning dependencies of target insights
make[2]: Leaving directory '/home/praveen/cppinsight/build_00'
make -f CMakeFiles/insights.dir/build.make CMakeFiles/insights.dir/build
make[2]: Entering directory '/home/praveen/cppinsight/build_00'
[ 7%] Building CXX object CMakeFiles/insights.dir/AutoStmtHandler.cpp.o
/home/praveen/ninja/bin/clang++ -I/home/praveen/cppinsight/build_00/generated -I/home/praveen/llvm-novice/llvm/include -I/home/praveen/cppinsight/cppinsights/. -isystem/home/praveen/llvm-novice/llvm/include -isystem/home/praveen/ninja/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -W -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O3 -fno-exceptions -fno-rtti -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -std=c++1z -Wextra -Wno-unknown-warning-option -Wold-style-cast -Werror -o CMakeFiles/insights.dir/AutoStmtHandler.cpp.o -c /home/praveen/cppinsight/cppinsights/AutoStmtHandler.cpp
In file included from /home/praveen/cppinsight/cppinsights/AutoStmtHandler.cpp:8:
/home/praveen/cppinsight/cppinsights/./AutoStmtHandler.h:11:10: fatal error: 'clang/AST/AST.h' file not found
#include "clang/AST/AST.h"
^~~~~~~~~~~~~~~~~
1 error generated.
CMakeFiles/insights.dir/build.make:62: recipe for target 'CMakeFiles/insights.dir/AutoStmtHandler.cpp.o' failed
make[2]: *** [CMakeFiles/insights.dir/AutoStmtHandler.cpp.o] Error 1
make[2]: Leaving directory '/home/praveen/cppinsight/build_00'
CMakeFiles/Makefile2:131: recipe for target 'CMakeFiles/insights.dir/all' failed
make[1]: *** [CMakeFiles/insights.dir/all] Error 2
make[1]: Leaving directory '/home/praveen/cppinsight/build_00'
Makefile:129: recipe for target 'all' failed
make: *** [all] Error 2

[andreasfertig]

Hi,

/home/praveen/llvm-novice/llvm/tools/clang/include/clang/AST looks like the clang/llvm source path to me. At least in my installation this is the case. But not the clang/llvm install location. Did you do a ninja/make install? It looks to me that you clang/llvm setup is incomplete. That said /home/praveen/llvm-novice/llvm/include; also looks odd. Usually, if you have /home/praveen/ninja/bin/clang++ then the headers are in /home/praveen/ninja/bin/../include/ which is the case for the libs. Please ensure that you clang/llvm installation is correct.

[praveen-velliengiri]

Let me install llvm and clang properly once again, and see what happens
Hoping this time it will build.
Thanks

[praveen-velliengiri]

Hi @andreasfertig
I have built the recent version of LLVM.

The command I used to build cppinsights is -

cmake -GNinja ../cppinsights -DCMAKE_CXX_COMPILER=/home/praveen/live/install/bin/clang++ -DCMAKE_PREFIX_PATH=/home/praveen/live/install/bin

-- The C compiler identification is GNU 5.4.0
-- The CXX compiler identification is Clang 7.0.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /home/praveen/live/install/bin/clang++
-- Check for working CXX compiler: /home/praveen/live/install/bin/clang++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found LLVM_CONFIG_PATH: /home/praveen/live/install/bin/llvm-config
-- llvm_config(LLVM_CXXFLAGS)=>-isystem/home/praveen/live/llvm/include -isystem/home/praveen/live/install/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O3 -fno-exceptions -fno-rtti -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS;
-- llvm_config(LLVM_LDFLAGS)=>-L/home/praveen/live/install/lib;
-- llvm_config(LLVM_LIBS)=>-lLLVMLTO -lLLVMPasses -lLLVMObjCARCOpts -lLLVMSymbolize -lLLVMDebugInfoPDB -lLLVMDebugInfoDWARF -lLLVMFuzzMutate -lLLVMTableGen -lLLVMDlltoolDriver -lLLVMLineEditor -lLLVMOrcJIT -lLLVMCoverage -lLLVMMIRParser -lLLVMTestingSupport -lLLVMObjectYAML -lLLVMLibDriver -lLLVMOption -lgtest_main -lgtest -lLLVMWindowsManifest -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMGlobalISel -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMX86Desc -lLLVMMCDisassembler -lLLVMX86Info -lLLVMX86AsmPrinter -lLLVMX86Utils -lLLVMMCJIT -lLLVMInterpreter -lLLVMExecutionEngine -lLLVMRuntimeDyld -lLLVMCodeGen -lLLVMTarget -lLLVMCoroutines -lLLVMipo -lLLVMInstrumentation -lLLVMVectorize -lLLVMScalarOpts -lLLVMLinker -lLLVMIRReader -lLLVMAsmParser -lLLVMInstCombine -lLLVMBitWriter -lLLVMAggressiveInstCombine -lLLVMTransformUtils -lLLVMAnalysis -lLLVMProfileData -lLLVMObject -lLLVMMCParser -lLLVMMC -lLLVMDebugInfoCodeView -lLLVMDebugInfoMSF -lLLVMBitReader -lLLVMCore -lLLVMBinaryFormat -lLLVMSupport -lLLVMDemangle;
-- llvm_config(LLVM_LIBDIR)=>/home/praveen/live/install/lib;
-- llvm_config(LLVM_INCLUDE_DIR)=>/home/praveen/live/llvm/include;
-- llvm_config(LLVM_SYSTEM_LIBS)=>-lz -lrt -ldl -ltinfo -lpthread -lm;
-- llvm_config(LLVM_PACKAGE_VERSION)=>7.0.0svn;
-- Git repo url: https://github.com/andreasfertig/cppinsights.git
-- Git commit hash: 5ce053d
-- Generating version.h
-- Found clang-tidy: /home/praveen/live/install/bin/clang-tidy
-- Stripping executable
-- Found Doxygen: /usr/local/bin/doxygen (found version "1.8.14") found components: doxygen dot
-- Using CXX: /home/praveen/live/install/bin/clang++
-- Configuring don
-- Generating done
-- Build files have been written to: /home/praveen/cppinsight/install

As you can see
llvm_config(LLVM_SYSTEM_LIBS)=>-lz -lrt -ldl -ltinfo -lpthread -lm; is now okay.

But when I'm running ninja, it's still finding the AST.h header file
The output of ninja:
1 error generated.
[6/14] Building CXX object CMakeFiles/insights.dir/CodeGenerator.cpp.o
FAILED: /home/praveen/live/install/bin/clang++ -Igenerated -I/home/praveen/live/llvm/include -I/home/praveen/cppinsight/cppinsights/. -isystem/home/praveen/live/llvm/include -isystem/home/praveen/live/install/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O3 -fno-exceptions -fno-rtti -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -std=c++1z -Wextra -Wno-unknown-warning-option -Wold-style-cast -Werror -MD -MT CMakeFiles/insights.dir/CodeGenerator.cpp.o -MF CMakeFiles/insights.dir/CodeGenerator.cpp.o.d -o CMakeFiles/insights.dir/CodeGenerator.cpp.o -c /home/praveen/cppinsight/cppinsights/CodeGenerator.cpp
In file included from /home/praveen/cppinsight/cppinsights/CodeGenerator.cpp:8:
/home/praveen/cppinsight/cppinsights/./CodeGenerator.h:11:10: fatal error: 'clang/AST/AST.h' file not found
#include "clang/AST/AST.h"
^~~~~~~~~~~~~~~~~
1 error generated.
ninja: build stopped: subcommand failed.

[praveen-velliengiri]

The instructions I used to build LLVM is

cmake -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=On -DLLVM_PARALLEL_LINK_JOBS=1
-DLLVM_ENABLE_LLD=1 -DLLVM_TARGETS_TO_BUILD="X86" ../llvm

[praveen-velliengiri]

Please check whether there is a mistake in CMakeLists.txt. FYI the AST.h is available in the directory
/home/praveen/live/llvm/tools/clang/include/clang/AST.
I placed my clang source files in the directory /home/praveen/live/llvm/tools.
I think that llvm-build is good.

[andreasfertig]

Hello preejackie,

unfortunately as far as I can tell, this build is better but still incomplete.

Your LLVM cmake command, if that is the entire command, then your still missing the ninja/make install. As you can read here: https://llvm.org/docs/GettingStarted.html

-DCMAKE_INSTALL_PREFIX=directory — Specify for directory the full pathname of where you want the LLVM tools and libraries to be installed (default /usr/local).

the default installation path would be /usr/local. While you pointing insights to your llvm-source directory.
Doing it correctly requires a ninja/make install and then your cmake-command roughly looks like this:

´´´
cmake -GNinja ../cppinsights -DCMAKE_CXX_COMPILER=/usr/local/bin/clang++ -DCMAKE_PREFIX_PATH=/usr/local/bin

[praveen-velliengiri]

Hi, Thank you.
I did make install, and now llvm is in directory /usr/local. When I run ninja to build cppinsights I'm now getting a different error.

Command: ninja

Error :
[6/14] Building CXX object CMakeFiles/insights.dir/CompilerGeneratedHandler.cpp.o
FAILED: /usr/local/bin/clang++ -Igenerated -I/home/praveen/cppinsight/cppinsights/home/praveen/live/llvm/tools/clang/include/clang -I/home/praveen/cppinsight/cppinsights/. -isystem/usr/local/include -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wno-maybe-uninitialized -Wdelete-non-virtual-dtor -Wno-comment -ffunction-sections -fdata-sections -O3 -fno-exceptions -fno-rtti -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -std=c++1z -Wextra -Wno-unknown-warning-option -Wold-style-cast -Werror -MD -MT CMakeFiles/insights.dir/CompilerGeneratedHandler.cpp.o -MF CMakeFiles/insights.dir/CompilerGeneratedHandler.cpp.o.d -o CMakeFiles/insights.dir/CompilerGeneratedHandler.cpp.o -c /home/praveen/cppinsight/cppinsights/CompilerGeneratedHandler.cpp
In file included from /home/praveen/cppinsight/cppinsights/CompilerGeneratedHandler.cpp:8:
In file included from /home/praveen/cppinsight/cppinsights/./CompilerGeneratedHandler.h:11:
In file included from /usr/local/include/clang/AST/AST.h:18:
In file included from /usr/local/include/clang/AST/ASTContext.h:18:
In file included from /usr/local/include/clang/AST/ASTTypeTraits.h:20:
In file included from /usr/local/include/clang/AST/Decl.h:17:
In file included from /usr/local/include/clang/AST/APValue.h:17:
In file included from /usr/local/include/clang/Basic/LLVM.h:22:
In file included from /usr/local/include/llvm/Support/Casting.h:18:
/usr/local/include/llvm/Support/Compiler.h:524:30: error: no member named 'align_val_t' in namespace 'std'
std::align_val_t(Alignment)
~~~~~^
/usr/local/include/llvm/Support/Compiler.h:544:26: error: no member named 'align_val_t' in namespace 'std'
std::align_val_t(Alignment)
~~~~~^

[andreasfertig]

Hello,

this seems to be again an issue with your build system. As far as I can tell you require libstdc++-7-dev when using a recent clang. I just update travis to use this libstdc++ version and it works.

[praveen-velliengiri]

I also agree that my build system is incorrectly pointing to gcc 5.4.0 for libstdc++. I will try to update my gcc version. Thanks for replying

[praveen-velliengiri]

Finally, I somehow got managed to get build correct. It is working but when I include header files in .cpp files it gives fatal error as file not found. How I can pass the path to my header files as command line arguments?

[andreasfertig]

Hello preejackie,

if I understand your question correct, then it is the same way as for every other clang tool as well:

insights <YOUR_CPP_FILE> -- -I <PATH_TO_YOUR_INCLUDE_FILES>

[praveen-velliengiri]

Hi @andreasfertig
In short,
I have different versions of gcc like 5.4.0, 6, 7.3, 8.1.0 installed in my systems. But by default the system uses gcc-5.4.0 installation for clang++. In clang++ command line option , we can tell clang to find different versions of gcc installed using "--gcc-toolchain" option. I tried " insights file.cpp -- -std=c++17 -extra-arg=--gcc-toolchain=/path/to/gcc-8.1/toolchain", but clang shows warning - "unused argument during compilation.

When I tried to use insights, with this command : insights file.cpp -- -std=c++17 -stdlib=libc++ it stills throws an error : not found stddef.h, I assume this bug has been fixed in much earlier version of clang.

Clang++ --version :
clang version 7.0.0,

Is there any work around for this ? Or a complete re-build of cppinsights will help ?
clang - bug in ubuntu

As far, without including any headers in .cpp file, insights is working and I can able to see clang generated code.

[andreasfertig]

Hi preejackie,

well that's due to your system. And at this point it has nothing to do with insights any more.

However, here is what I know. --gcc-toolchain seems to be a build option while building clang, but not later. Additionally -stdlib=libc++ seems pointless to me, as insights does not link against any standard library. All it needs are the headers which are not communicated with this option.

Anyhow, you might have a look at the insights documentation https://github.com/andreasfertig/cppinsights#usage

The script can be used together with C++ Insights:
insights <YOUR_CPP_FILE> -- -std=c++17 ./scripts/getinclude.py

This script returns the include path for a compiler. By default it uses g++.

Hope this helps.