[SOLVED] Recursively include headers in include option for gcc

Hello all,
Is there a way to recursively include all header files in the gcc command
"cc -I ..."

I have a directory with tens of subdirectories, each of which have header files in them. So while compiling a program test.c, I have a very long cc command like
"cc -I /home/dir/subdir1 -I /home/dir/subdir2 -I /home/dir/subdir3 ..... test.c"

If there could be a way to recursively include all header files in a directory, the compilation command would be pretty short in length.

Thanks,
Kshitij

AFAIK you cannot do it with GCC alone

"cc -I ..." is OK.
The alternative is a Makefile.

This example is a snippet from ns-2.33/Makefile.in

    63	
    64	INCLUDES = \
    65		-I. @V_INCLUDE_X11@ \
    66		-I. \
    67		@V_INCLUDES@ \
    68		-I./tcp -I./sctp -I./common -I./link -I./queue \
    69		-I./adc -I./apps -I./mac -I./mobile -I./trace \
    70		-I./routing -I./tools -I./classifier -I./mcast \
    71		-I./diffusion3/lib/main -I./diffusion3/lib \
    72		-I./diffusion3/lib/nr -I./diffusion3/ns \
    73		-I./diffusion3/filter_core -I./asim/ -I./qs \
    74		-I./diffserv -I./satellite \
    75		-I./wpan
    76

The shell is your friend; and your "-I" options are being used in a shell command invoking gcc.
So it is totally legit:
INCLUDE = ..... \
`find /home/dir/subdir[12345] -type d | sed s/^/-I/` # note the (`) backquotes

Originally Posted by mischasan The shell is your friend; and your "-I" options are being used in a shell command invoking gcc. So it is totally legit: INCLUDE = ..... \ `find /home/dir/subdir[12345] -type d | sed s/^/-I/` # note the (`) backquotes

This thread is three years old...

Yah, I guess I have too much time on my hands ... and the post showed up in google search, ABOVE one of my own blog posts on a related topic.