How to add multiple header include and library directories to the search path in a single gcc command?

Question

Chris Stratton · Accepted Answer · 2019-07-09T14:38:42.413

120

Use multiple -I flags for the include directories and multiple -L flags for the lib directories

edited Jul 09 '19 at 14:38

answered May 01 '11 at 06:11

Chris Stratton

3

Does using -I/path/to/dir/ include all the header files in the sub directories present in /path/to/dir/ also? – Vishnu N K Nov 14 '17 at 10:11

score 41 · Answer 2 · answered May 01 '11 at 06:15

41

You can set the C_INCLUDE_PATH environment variable.

export C_INCLUDE_PATH=.:/some/dir:/some/other/dir

as well as the LIBRARY_PATH environment variable.

answered May 01 '11 at 06:15

Brian Roach

score 19 · Answer 3 · answered Apr 12 '17 at 13:57

19

On Linux you need to use -I before each directory that you want to add.

Example:

user:/home/my_project$ gcc -g -Wall -I/usr/include/lib_Directory/ -I./include -c ./src/transcod.c

./ means the current directory where you are running the command, in this case my_project;

answered Apr 12 '17 at 13:57

Jeff Pal

2

That's an aspect of the compiler, not the operating system – Chris Stratton Jul 09 '19 at 14:40

3 Answers3