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

Question

Chris Stratton · Accepted Answer · 2019-07-09 14:38:42Z

133

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

answered May 1, 2011 at 6:11

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1 Comment

Does using -I/path/to/dir/ include all the header files in the sub directories present in /path/to/dir/ also?

Brian Roach · Accepted Answer · 2011-05-01 06:15:44Z

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.

Jeff Pal · Accepted Answer · 2017-04-12 13:57:18Z

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;