On 25 September 2011 14:31, ali hagigat wrote: > gcc -Itmp3/hd1 -Itmp3/hd2 -I-tmp3/hd3 prog9.c -o prog9 > > I have used -I- in the above instruction. No you haven't, you've used -I-tmp/hd3 which is the same as -I -tmp/hd3 i.e. it adds the directory "-tmp/hd3" to the include path The -I- option doesn't take a directory, if it did the manual would say -I-dir
