Generating intermediate .i files (preprocessed files) when compiling Ubuntu-8.04

I'm building ubuntu-8.04 with gcc 3.4 and I need to generate the .i files, which are the output of the gcc preprocessor. I have tried adding the --save-temps flag but this only generates the .i files for the top level directory, i.e. source, and does not seem to get passed recursively to the child directories. I also tried the -E flag, which is supposed to output preprocessed 开发者_运维问答files and stop compilation, but this did not generate the files either.

I'm specifically looking to generate the .i files for the source in net/core.

Any help is appreciated. Thanks!!

There is no support for bulk preprocessing.

For single file use "make net/core/foo.i"

For bulk, workaround is "make C=2 CHECK="cc -E"".

I know that is an old post, but maybe can be useful; for me this works: gcc -E filename.c -o outputfile.i