[Octave-bug-tracker] [bug #42704] mkoctfile returns 0 if compile failed but linking succeeded

[Andreas Weber]

Follow-up Comment #1, bug #42704 (project octave):

hm, there seems to be a problem with savannah and I'll try to add the code
again:

hello.cc:

#include <iostream>
int main()
{
  std::cout << "hello bug hunter..." << std::endl;
  return 0;
}


now compile with mkoctfile:

$ mkoctfile -v hello.cc 

cmd = ccache g++ -c  -fPIC -I/usr/local/include/octave-4.1.0+/octave/..
-I/usr/local/include/octave-4.1.0+/octave -I/usr/local/include  -g -O2
-pthread    hello.cc -o hello.o
result = 0
cmd = ccache g++ -shared -Wl,-Bsymbolic  -o hello.oct  hello.o  
-L/usr/local/lib/octave/4.1.0+ -L/usr/local/lib -loctinterp -loctave   
result = 0


All went fine as expected. Now add a syntax error to hello.cc and run
mkoctfile again:


$ mkoctfile -v hello.cc 
cmd = ccache g++ -c  -fPIC -I/usr/local/include/octave-4.1.0+/octave/..
-I/usr/local/include/octave-4.1.0+/octave -I/usr/local/include  -g -O2
-pthread    hello.cc -o hello.o
hello.cc: In function ‘int main()’:
hello.cc:5:3: error: ‘xyz’ was not declared in this scope
   xyz
   ^
result = 256
cmd = ccache g++ -shared -Wl,-Bsymbolic  -o hello.oct  hello.o  
-L/usr/local/lib/octave/4.1.0+ -L/usr/local/lib -loctinterp -loctave   
result = 0

$ echo $?
0


As you can see g++ failed and returned 256 but mkoctfile nevertheless tries to
link hello.o which succeeds and returns 0 therefore.

-- Andy

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