src/png/scripts/pnglibconf.mak

   1 #!/usr/bin/make -f
   2 # pnglibconf.mak - standard make lines for pnglibconf.h
   3 #
   4 # These lines are copied from Makefile.am, they illustrate
   5 # how to automate the build of pnglibconf.h from scripts/pnglibconf.dfa
   6 # given 'awk' and 'sed'
   7
   8 # Override as appropriate, these definitions can be overridden on
   9 # the make command line (AWK='nawk' for example).
  10 AWK = gawk
  11 AWK = mawk
  12 AWK = nawk
  13 AWK = one-true-awk
  14 AWK = awk  # Crashes on SunOS 5.10 - use 'nawk'
  15 CPP = $(CC) -E # Does not work on SUN OS 5.10 - use /lib/cpp
  16 SED = sed
  17
  18 COPY = cp
  19 DELETE = rm -f
  20 ECHO = echo
  21 DFA_XTRA = # Appended to scripts/options.awk
  22
  23 # CPPFLAGS should contain the options to control the result,
  24 # but DEFS and CFLAGS are also supported here, override
  25 # as appropriate
  26 DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS)
  27
  28 # srcdir is a defacto standard for the location of the source
  29 srcdir = .
  30
  31 # The standard pnglibconf.h exists as scripts/pnglibconf.h.prebuilt,
  32 # copy this if the following doesn't work.
  33 pnglibconf.h: pnglibconf.dfn
  34         $(DELETE) $@ dfn.c dfn1.out dfn2.out dfn3.out
  35         $(ECHO) '#include "pnglibconf.dfn"' >dfn.c
  36         $(CPP) $(DFNFLAGS) dfn.c >dfn1.out
  37         $(ECHO) "If 'cpp -e' crashes try /lib/cpp (e.g. CPP='/lib/cpp')" >&2
  38         $(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\
  39             dfn1.out >dfn2.out
  40         $(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out
  41         $(COPY) dfn3.out $@
  42         $(DELETE) dfn.c dfn1.out dfn2.out dfn3.out
  43
  44 pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h
  45         $(DELETE) $@ dfn1.out dfn2.out
  46         $(ECHO) "Calling $(AWK) from scripts/pnglibconf.mak" >&2
  47         $(ECHO) "If 'awk' crashes try a better awk (e.g. AWK='nawk')" >&2
  48         $(AWK) -f $(srcdir)/scripts/options.awk out=dfn1.out version=search\
  49                 $(srcdir)/pngconf.h $(srcdir)/scripts/pnglibconf.dfa\
  50                 $(DFA_XTRA) 1>&2
  51         $(AWK) -f $(srcdir)/scripts/options.awk out=dfn2.out dfn1.out 1>&2
  52         $(COPY) dfn2.out $@
  53         $(DELETE) dfn1.out dfn2.out
  54
  55 clean-pnglibconf:
  56         $(DELETE) pnglibconf.h pnglibconf.dfn dfn.c dfn1.out dfn2.out dfn3.out
  57
  58 clean: clean-pnglibconf