admin/notes/cpp

   1 ttn 2003-04-09
   2
   3 we use a C preprocesor not only in the normal compilation of .c files
   4 into object files, but also for creating
   5
   6         src/Makefile
   7         lib-src/Makefile
   8
   9 (delimited by comment "start of cpp stuff").  some cpp implementations
  10 insert whitespace in between tokens, which explains the "$(dot)$(dot)"
  11 and "UNEXEC_ALIAS" workarounds for unixoid systems and the bundled
  12 tradcpp/ for vms.  [NOTE: tradcpp/ not yet checked in.]
  13
  14 during makefile creation, the preprocessor symbol NOT_C_CODE is defined.
  15 this should not be defined for normal .c file compilation.
  16
  17 there has been discussion on eliminating this use of cpp and relying
  18 solely on autoconf processing.  rms says to leave it be.
  19
  20 ;;; arch-tag: d654291e-9fc8-41b7-ab0c-d3cde842a8e0