948651 - Unified sources make it difficult to generate preprocessed files

Status: RESOLVED DUPLICATE of bug 943971

(Firefox Build System :: General, defect)

Description

[Steve Fink [:sfink] [:s:]]

I used to be able to go into an objdir and run

   make nsWhatever.i

and get a nice preprocessed file. (Often, I'd use this to cut & paste the command line to generate the preprocessed file, then munge it to do -fdump-tree-gimple or whatever.)

Now, it's not as nice:

1. grep nsWhatever.cpp Unified*.cpp
2. make Unified_whatever.i
3. Try to ignore everything else in the file other than the stuff needed for nsWhatever.cpp.

It would be nice if the .i targets still worked, even if 'make nsWhatever.o' does not.