how to instruct gcc/clang to output temporary files to a particular directory

Question

While using the --save-temps option to save the temporary files, gcc/clang outputs the temporary file in the same directory as the input files. Is there an option to instruct gcc to output the files to some other directory.

OR

When not using the --save-temps option the temporary files are created in a default directory (i.e. $TMPDIR such as /tmp) but they are deleted once the object file is created. Is there a way to instruct the compiler to keep those files instead of just deleting them ( i think that the only option is --save-temps, which has the problem stated above)

Answer 1

If you use -save-temps=obj the temporary files are put in the same directory as the output files, so e.g.

gcc -save-temps=obj -o dir/foo.o foo.c

will create dir/foo.i

This is documented in the manual, obviously. All supported options are listed at https://gcc.gnu.org/onlinedocs/gcc/Option-Summary.html and that links to https://gcc.gnu.org/onlinedocs/gcc/Developer-Options.html for -save-temps.