cpprules.in

   1 #                                                       -*- Makefile -*-
   2 # Rules for generating files using the C pre-processor
   3 # (Replaces CppFileTarget from Imake)
   4
   5 SED = LC_CTYPE=C sed
   6
   7 SUFFIXES += .pre
   8
   9 WCHAR32_FLAGS = -DWCHAR32=@WCHAR32@
  10
  11 CPP_FILES_FLAGS = $(WCHAR32_FLAGS)
  12
  13 # Translate XCOMM into pound sign with sed, rather than passing -DXCOMM=XCOMM
  14 # to cpp, because that trick does not work on all ANSI C preprocessors.
  15 # Delete line numbers from the cpp output (-P is not portable, I guess).
  16 # Allow XCOMM to be preceded by whitespace and provide a means of generating
  17 # output lines with trailing backslashes.
  18 # Allow XHASH to always be substituted, even in cases where XCOMM isn't.
  19
  20 CPP_SED_MAGIC = $(SED) -e '/^\#  *[0-9][0-9]*  *.*$$/d' \
  21                        -e '/^\#line  *[0-9][0-9]*  *.*$$/d' \
  22                        -e '/^[         ]*XCOMM$$/s/XCOMM/\#/' \
  23                        -e '/^[         ]*XCOMM[^a-zA-Z0-9_]/s/XCOMM/\#/' \
  24                        -e '/^[         ]*XHASH/s/XHASH/\#/' \
  25                        -e 's,X11_LOCALEDATADIR,$(X11_LOCALEDATADIR),g' \
  26                        -e '/\@\@$$/s/\@\@$$/\\/'
  27
  28 .pre:
  29         @$(MKDIR_P) $(@D)
  30         $(AM_V_GEN)$(RAWCPP) $(RAWCPPFLAGS) $(CPP_FILES_FLAGS) < $< | $(CPP_SED_MAGIC) > $@