_ROOT Version: 6.26/06
Platform: macOS 12.4
Compiler: g++ / clang ?
I can compile the root macros written in C with
root /path/to/mymacro.c command just fine but I can’t compile a C++ file including headers from ROOT. I am using bash.
A basic cpp file like this
(with or without) #include <iostream>
std::cout << "Hello World!" << std::endl;
Does not compile. It gives many errors.
I am trying to write a C++ program where I get a TSV file from the user, in which the columns are converted to vectors in another cpp program I wrote ( which works fine), and I want to convert those vectors to TTree’s with a new cpp file I linked together with #include “giant.h” .
I used the prompt
g++ all_of_the_files_I_want_to_compile_.cpp -o output $(root-config --libs) and
g++ all_the_files.cpp -o output $(root-config --cflags) and
g++ myfile.c I$(root-config --incdir) -o output and all the other configurations I can’t remember now.
I am a noob idk what to do at this point!
$(root-config --cxx --cflags) -O2 -Wall -Wextra -o output all_the_files.cpp $(root-config --libs)
Thank you for your prompt response.
When I run the command you gave with all the source files, I get the variations of the following error:
ld: warning: ignoring file /usr/local/Cellar/root/6.26.06_2/lib/root/libROOTDataFrame.so, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
Undefined symbols for architecture arm64:
"TVersionCheck::TVersionCheck(int)", referenced from:
__GLOBAL__sub_I_functions.cpp in functions-e54aa0.o
__GLOBAL__sub_I_interface.cpp in interface-7ec9d8.o
__GLOBAL__sub_I_main.cpp in main-ac668d.o
ld: symbol(s) not found for architecture arm64
I haven’t used the functions dependent on the ROOT headers in my program yet. When I remove TFile.h and TTree.h from the
giant.h file that every source file depends on and run the exact same thing with:
g++ allsource.cpp -o output
I can get the output file with no problems.
Looks like you have ROOT binaries for an “x86_64” while your machine is an “arm64”.
Do I have to uninstall and install the correct version of ROOT? If so, may I ask how do I find it? I am new to programming C++ and ROOT.
Thank you very much! I wasn’t able to solve this problem for the last couple days.
So, I rebuilded ROOT a few times using different sources, which I probably made a mistake with because I kept getting the same error. Adding
-arch x86_64 at the end of the command you shared solved my problem for some reason:
$(root-config --cxx --cflags) -O2 -Wall -Wextra -o output all_the_files.cpp $(root-config --libs) -arch x86_64
Leaving this here if anyone else needs it.
Thank you very much.