I defined a special file: config.h
My project also has files:
t.c, t.h
pp.c, pp.h
b.c b.h
l.cpp
and #includes:
in t.c:
#include "t.h"
#include "b.h"
#include "pp.h"
#include "config.h"
in b.c:
#include "b.h"
#include "pp.h"
in pp.c:
#include "pp.h"
#include "config.h"
in l.cpp:
#include "pp.h"
#include "t.h"
#include "config.h"
there are no include directives in my *.h
files, only in *.c
files. I defined this in config.h:
const char *names[i] =
{
"brian", "stefan", "steve"
};
and need that array in l.cpp, t.c, pp.c but Im getting this error:
pp.o:(.data+0x0): multiple definition of `names'
l.o:(.data+0x0): first defined here
t.o:(.data+0x0): multiple definition of `names'
l.o:(.data+0x0): first defined here
collect2: ld returned 1 exit status
make: *** [link] Error 1
I have include guards in every *.h
file I use in my project. Any help solving this?
This question is related to
c
linker
linker-errors
Declarations of public functions go in header files, yes, but definitions are absolutely valid in headers as well! You may declare the definition as static (only 1 copy allowed for the entire program) if you are defining things in a header for utility functions that you don't want to have to define again in each c file. I.E. defining an enum and a static function to translate the enum to a string. Then you won't have to rewrite the enum to string translator for each .c file that includes the header. :)
Source: Stackoverflow.com