1. mkdir /export/home/tester/1
2. cd /export/home/tester/1
3. vi args.c
-----------------------------------------
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(int argc, char**argv) {
    int i;
    
    // Prints arguments
    printf("Arguments:\n");
    for (i = 0; i < argc; i++) {
        printf("%i: %s\n", i, argv[i]);
    }
    
    return 0;
}
-----------------------------------------

4. vi Makefile

---------------------------------
args: args.c
    gcc -g -o args args.c
----------------------------------

5. Clean userdir. Start Netbeans
6. New project with existing Makefile
6.1 Project Name and Location set default(project location is ~/MakefileProject1)
6.2 Build actions: choose Working directory: /export/home/tester/1
Build command: make
Output file: /export/home/tester/1/args
6.3 On "Source File Folders" add /export/home/tester/1
Click Finish.
7. Add Existing Item /export/home/tester/1/Makefile.
8. Build Project ==> Build failed due to "Makefile:2: *** missing separator. 
Stop.". It's Ok, we just need to replace leading spaces in 2-nd line of Makefile
with Tab.
9. Open Makefile in Editor. Set Tab instead of spaces. Build project ==> Build
successful.
10. Open Tools/Options and just push OK.
11. Try the step 9 again. I mean delete the Tab and set new Tab in the same
place. Instead of 8-spaces tab there is Tab expanded to 4 spaces. Build failed
again. Due to IZ 86750(pure Netbeans bug) I can't restore not expand Tabs to spaces.
So after user once open Options he could not add new commands to Makefile. I
think it is very serious bug and need in immediate attention