Permission denied when trying to run C++ application

Question

I am new to C++. I built code from a repo using this command:

g++ -Wall -g -std=c++11 -I/Users/asi/anaconda3/pkgs/libopencv-3.4.2-h7c891bd_1/include -c -o RPPG.o RPPG.cpp -o Heartbeat

There were no errors. However, when I run:

$ ./Heartbeat

I get the error: -bash: ./Heartbeat: Permission denied

I am on a Mac. What am I doing wrong?

EDIT

I removed -c -o RPPG.o, so that the command is now:

g++ -Wall -g -std=c++11 -I/Users/asi/anaconda3/pkgs/libopencv-3.4.2-h7c891bd_1/include RPPG.cpp -o Heartbeat

But that gives me this error (i removed a bunch of the middle output as it was too big to post:

Undefined symbols for architecture x86_64:

      RPPG::extractSignal_xminay() in RPPG-297942.o
      cv::Mat_<double>::operator=(cv::Mat&&) in RPPG-297942.o
  "_main", referenced from:
     implicit entry/start for main executable
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Remove `-c` and `-o RPPG.o` from the compiler command line. You have a conflicting set of flags there. — Paul Sanders, Sep 03 '20 at 19:53
now you have to specify how to link this library: so add `-L -l`. Note that `` is not same as file name of it. — Marek R, Sep 03 '20 at 20:01
I would recommend you to learn use some build manager, like `cmake`. Lots of building stuff will be automated. — Marek R, Sep 03 '20 at 20:04
I don't see you linking to opencv libraries for this one: `cv::Mat_::operator=(cv::Mat&&) in RPPG-297942.o` — drescherjm, Sep 03 '20 at 20:05
`RPPG::extractSignal_xminay() in RPPG-297942.o` is confusing because you appear to be compiling RRPG.cpp. Not sure what this is about. — drescherjm, Sep 03 '20 at 20:06
@MarekR I do not understand your suggestion about how to link library. What command should I enter? — connor449, Sep 03 '20 at 21:02
You have to figure out what libraries your code needs. His instruction was the arguments to use once you figure that out. — drescherjm, Sep 03 '20 at 22:17
Probably one is -lopencv_core however there are several other opencv libraries that may be used. — drescherjm, Sep 03 '20 at 22:21

Permission denied when trying to run C++ application

EDIT

0 Answers0