The problem:
$ g ./main.cc -o prueba
/home/<myname>/tmp/ccEOfejM.o(.text 0x11): In function
`main':
: undefined reference to `foo()'
collect2: ld returned 1 exit status
$ nm *.o
foo.o:
00000000 T _Z3foov
main.o:
U __gxx_personality_v0
00000000 T main
U _Z3foov
***U = undefined, but foo() is defined by #include
"foo.h" in main.cc
$ more *.cc *.h
::::::::::::::
foo.cc
::::::::::::::
#include "foo.h"
int foo()
{
return 42;
}
::::::::::::::
main.cc
::::::::::::::
#include "foo.h"
int main()
{
return foo();
}
::::::::::::::
foo.h
::::::::::::::
int foo();
I realize that compiling and linking this simple
example I going to
solve my real problem from my larger project.
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