trouble compiling in predefined directory from root

[sed_y]

hi, suppose I am in a subdirectory within /home/usr
as

 /home/usr/dir1

and i can compile as

 gcc -c file.c

This works.however, suppose i am at root and want to compile the same code. i use

 gcc -c -I~/dir1 file.c

or

 gcc -c -I/home/usr/dir1 file.c

i get the error : no such file or directory.
where am i wrong? what is te right syntax for -I with gcc?
thanks

[Rubberman]

hi, suppose I am in a subdirectory within /home/usr
as

 /home/usr/dir1

and i can compile as

 gcc -c file.c

This works.however, suppose i am at root and want to compile the same code. i use

 gcc -c -I~/dir1 file.c

or

 gcc -c -I/home/usr/dir1 file.c

i get the error : no such file or directory.
where am i wrong? what is te right syntax for -I with gcc?
thanks

Wrong syntax. Try:

gcc -c /home/usr/dire1/file.c -o file.o

The -I option is to instruct the compiler where to find the include files, so if you have header files in /home/usr/dir1, you would include it as "-I /home/usr/dir1" in your compile line.

[sed_y]

Thanks,
so, with no header files, i can just give path w/o I directive.