> >> On my OSX (10.3.8) it is in /usr/bin/cpp.
> >
> > In that case, c-macro-preprocessor is set to "/lib/cpp -C" and
> > c-macro-expand
> > doesn't work on OSX?
>
> If c-macro-preprocessor is a recent variable I can't check because
> Emacs does not currently compile on Mac OSX 10.3. My (a bit old) CVS
> compile does not seem to have it.
c-macro-expand and c-macro-preprocessor have been around for quite a
while. c-macro-expand is an interactive autoloaded Lisp function in cmacexp.el
that can be invoked in C mode with C-c C-e or from the menu-bar. Apparently
this file is not part of cc-mode so perhaps its not being maintained.
c-macro-expand seems quite useful so I'm kind of surprised that, as a C
specialist, you're don't use it/not familiar with it.
> But c-macro-expand does not work:
If we added the line below to c-macro-preprocessor would it work then for Mac
OSX?
Nick
(defcustom c-macro-preprocessor
;; Cannot rely on standard directory on MS-DOS to find CPP. In
;; fact, cannot rely on having cpp.exe, either, in latest GCC
;; versions.
(cond ((eq system-type 'ms-dos) "gcc -E -C -o - -")
;; Solaris has it in an unusual place.
((and (string-match "^[^-]*-[^-]*-\\(solaris\\|sunos5\\)"
system-configuration)
(file-exists-p "/opt/SUNWspro/SC3.0.1/bin/acomp"))
"/opt/SUNWspro/SC3.0.1/bin/acomp -C -E")
((file-exists-p "/usr/ccs/lib/cpp") "/usr/ccs/lib/cpp -C")
+ ((eq system-type 'darwin) "cpp -C")
(t "/lib/cpp -C"))
"The preprocessor used by the cmacexp package.
If you change this, be sure to preserve the `-C' (don't strip comments)
option, or to set an equivalent one."
:type 'string
:group 'c-macro)
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