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.
I must have misspelled the name when looking for it. I've seen the macro expand region menu item in the C menu, but actually never had any use for 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?
Yes it would.
Jan D.
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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