CODEWITHSUNDEEP
c++cmakeclion
Mixalis Navridis
Mixalis Navridis

Reputation: 329

cc1plus.exe: error: unrecognized command line option '-fdump-class-hierarchy' with CMake

I am trying to Dumping a representation of each class's hierarchy and virtual function table layout of my c++ program to a file. I managed to do it with success when I compiled it from a command line with this option:

g++ -fdump-class-hierarchy main.cpp

My problem now is when I tried to make it with cmake I failed. The option -fdump-class-hierarchy was never used.Here is my CmakeList.txt

cmake_minimum_required(VERSION 3.10.2)
project(VTable)
set(CMAKE_CXX_STANDARD 14)
find_path(GCC_PATH g++.exe)
message("GCC_PATH = ${GCC_PATH}")
set(CMAKE_CXX_COMPILER "${GCC_PATH}/g++")
set(CMAKE_CXX_FLAGS         "-std=c++11 -Wall -Wno-unused-variable -fdump-class-hierarchy")
set(CMAKE_CXX_FLAGS_DEBUG   "-O0 -g")
set(CMAKE_CXX_FLAGS_RELEASE "-O2")
add_executable(VTable main.cpp Grandparent.cpp Parent1.cpp Parent2.cpp Child.cpp)

Can someone help me to get the dump file output from the CmakeList.txt.By the way, does anyone knows any way to dump only my class code

Here is the the problem output

"C:\Program Files\JetBrains\CLion 2018.2.4\bin\cmake\win\bin\cmake.exe" -DCMAKE_BUILD_TYPE=Debug -G "CodeBlocks - MinGW Makefiles" "path"
GCC_PATH = C:/Program Files (x86)/mingw-w64/i686-8.1.0-posix-dwarf-rt_v6-rev0/mingw32/bin
-- Configuring done
-- Generating done
-- Build files have been written to: path/cmake-build-debug

Problems were encountered while collecting compiler information:
    cc1plus.exe: error: unrecognized command line option '-fdump-class-hierarchy'

[Finished]

I'am using CLion IDE

Upvotes: 2

Views: 2650

Answers (1)

Mike Kinghan
Mike Kinghan

Reputation: 61550

Your CLion/CMake build invokes the mingw-w64 port of GCC g++ 8.1. The C++ compiler optiion -fdump-class-hierarchy was available in GCC 7.x and earlier but removed in GCC 8.x. That is why:

cc1plus.exe: error: unrecognized command line option '-fdump-class-hierarchy'

in your CLion build. If the console commandline:

g++ -fdump-class-hierarchy main.cpp

succeeded then it invoked a different and earlier version of g++ from a different GCC installation - perhaps discovered earlier in your PATH than C:/Program Files (x86)/mingw-w64/i686-8.1.0-posix-dwarf-rt_v6-rev0/mingw32/bin/g++.exe, or perhaps discovered on a different computer (since you do not state that it was the same one on which your CLion build fails).

Upvotes: 2

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