How do I compile with external header file in sublime text in C? - c

Question

I use one header named header.h in main.c.
The function test is announced in header.h and defined in test.c.
However, it says words below even though I use build system as C.
clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated
Undefined symbols for architecture x86_64:
"test(int)", referenced from:
_main in main-a4d82e.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
[Finished in 0.6s with exit code 1]
[cmd: ['bash', '-c', 'g++ -Wall -std=c++11 -O2 \'/Users/hanlock/Documents/CODE/TEST/TEST/main.c\' -o \'/Users/hanlock/Documents/CODE/TEST/TEST/main\' && osascript -e \'tell application "Terminal" to activate do script " cd \\"/Users/hanlock/Documents/CODE/TEST/TEST\\" &&start_ms=$(ruby -e \\"puts (Time.now.to_f * 1000).to_i\\")&&clear&&\\"/Users/hanlock/Documents/CODE/TEST/TEST/main\\" &&elapsed_ms=$(($(ruby -e \\"puts (Time.now.to_f * 1000).to_i\\") - start_ms))&& read -p \\"Press Enter to exit($elapsed_ms ms).\\"&&exit"\'']]
[dir: /Users/hanlock/Documents/CODE/TEST/TEST]
[path: /usr/bin:/bin:/usr/sbin:/sbin]
I've read similar questions about this in C++. However, it seems not working in my case.
So, here comes the problem. How can I use external header file with sublime in language C?
Here is the code:
main.c
#include <stdio.h>
#include "./Header.h"
int main(int argc, const char * argv[]) {
test(1);
return 0;
}
header.h
#ifndef Header_h
#define Header_h
int test(int);
#endif
test.c
#include <stdio.h>
int test(int i){
printf("%d\n",i);
return 0;
}

Answer 1

In test.c:
#include "header.h"
In your shell:
gcc -I [dir] test.c
This will include any external header named header.h located in dir.
I hope this answers your question.