src/png/projects/owatcom/pngconfig.mak

   1 # This is an OpenWatcom make file which builds pnglibconf.h - the libpng
   2 # configuration header.  You can ignore this file if you don't need to
   3 # configure libpng; a default configuration will be built.
   4 #
   5 # For more information build libpng.wpj under the IDE and then read the
   6 # generated files:
   7 #
   8 #    config.inf: Basic configuration information for a standard build.
   9 #    pngconfig.dfa: Advanced configuration for non-standard libpng builds.
  10 #
  11 DELETE=rm -f
  12 ECHO=echo
  13 COPY=copy
  14 #
  15 # If your configuration needs to test compiler flags when building
  16 # pnglibconf.h you may need to override the following on the wmake command
  17 # line:
  18 CFLAGS=
  19 CC=wcl386
  20 CPP=$(CC) -pw0
  21 #
  22 # Read awk from the environment if set, else it can be set on the command
  23 # line (the default approach is to set the %awk% environment variable in the
  24 # IDE libpng.wpj 'before' rule - this setting is local.)
  25 !ifdef %awk
  26 AWK=$(%awk)
  27 !endif
  28 #
  29 # pnglibconf.h must exist in the source directory, this is the final rule
  30 # which copies the local built version (and this is the default target for
  31 # this makefile.)
  32 ..\..\pnglibconf.h: pnglibconf.h
  33  $(COPY) pnglibconf.h $@
  34
  35 !ifdef AWK
  36 # CPPFLAGS should contain the options to control the result,
  37 # but DEFS and CFLAGS are also supported here, override
  38 # as appropriate
  39 DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS)
  40
  41 pnglibconf.h: pnglibconf.dfn
  42  $(DELETE) $@ dfn.c dfn1.out dfn2.out
  43  $(ECHO) $#include "pnglibconf.dfn" >dfn.c
  44  $(CPP) $(DFNFLAGS) dfn.c >dfn1.out
  45  $(AWK) -f << dfn1.out >dfn2.out
  46 /^.*PNG_DEFN_MAGIC-.*-PNG_DEFN_END.*$$/{
  47  sub(/^.*PNG_DEFN_MAGIC-/, "")
  48  sub(/ *-PNG_DEFN_END.*$$/, "")
  49  gsub(/ *@@@ */, "")
  50  print
  51 }
  52 <<
  53  $(COPY) dfn2.out $@
  54  @type << >pngconfig.inf
  55 This is a locally configurable build of libpng.lib; for configuration
  56 instructions consult and edit projects/openwatcom/pngconfig.dfa
  57 <<
  58  $(DELETE) dfn.c dfn1.out dfn2.out
  59
  60 pnglibconf.dfn: ..\..\scripts\pnglibconf.dfa ..\..\scripts\options.awk pngconfig.dfa ..\..\pngconf.h
  61  $(DELETE) $@ dfn1.out dfn2.out
  62  $(AWK) -f ..\..\scripts\options.awk out=dfn1.out version=search ..\..\pngconf.h ..\..\scripts\pnglibconf.dfa pngconfig.dfa $(DFA_XTRA) 1>&2
  63  $(AWK) -f ..\..\scripts\options.awk out=dfn2.out dfn1.out 1>&2
  64  $(COPY) dfn2.out $@
  65  $(DELETE) dfn1.out dfn2.out
  66
  67 !else
  68 # The following lines are used to copy scripts\pnglibconf.h.prebuilt and make
  69 # the required change to the calling convention.
  70 #
  71 # By default libpng is built to use the __cdecl calling convention on
  72 # Windows.  This gives compatibility with MSVC and GCC.  Unfortunately it
  73 # does not work with OpenWatcom because OpenWatcom implements longjmp using
  74 # the __watcall convention (compared with both MSVC and GCC which use __cdecl
  75 # for library functions.)
  76 #
  77 # Thus the default must be changed to build on OpenWatcom and, once changed,
  78 # the result will not be compatible with applications built using other
  79 # compilers (in fact attempts to build will fail at compile time.)
  80 #
  81 pnglibconf.h: ..\..\scripts\pnglibconf.h.prebuilt .existsonly
  82  @$(ECHO) .
  83  @$(ECHO) .
  84  @$(ECHO) $$(AWK) NOT AVAILABLE: COPYING scripts\pnglibconf.h.prebuilt
  85  @$(ECHO) .
  86  @$(ECHO) .
  87  vi -q -k ":1,$$s/PNG_API_RULE 0$$/PNG_API_RULE 2/\n:w! $@\n:q!\n" ..\..\scripts\pnglibconf.h.prebuilt
  88  @$(ECHO) .
  89  @$(ECHO) .
  90  @$(ECHO) YOU HAVE A DEFAULT CONFIGURATION BECAUSE YOU DO NOT HAVE AWK!
  91  @$(ECHO) .
  92  @$(ECHO) .
  93  @type << >pngconfig.inf
  94 This is the default configuration of libpng.lib, if you wish to
  95 change the configuration please consult the instructions in
  96 projects/owatcom/pngconfig.dfa.
  97 <<
  98
  99 !endif
 100
 101 # Make the default files
 102 defaults: .symbolic
 103  @$(COPY) << config.inf
 104 $# The libpng project is incompletely configured.  To complete configuration
 105 $# please complete the following steps:
 106 $#
 107 $#   1) Edit the 'before' rule of libpng.wpj (from the IDE) to define the
 108 $#      locations of the zlib include file zlib.h and the built zlib library,
 109 $#      zlib.lib.
 110 $#
 111 $#   2) If you want to change libpng to a non-standard configuration also
 112 $#      change the definition of 'awk' in the before rule to the name of your
 113 $#      awk command.  For more instructions on configuration read
 114 $#      pngconfig.dfa.
 115 $#
 116 $#   3) Delete this file (config.inf).
 117 <<
 118  @$(COPY) << pngconfig.dfa
 119 $# pngconfig.dfa: this file contains configuration options for libpng.
 120 $# If emtpy the standard configuration will be built.  For this file to be
 121 $# used a working version of the program 'awk' is required and the program
 122 $# must be identified in the 'before' rule of the project.
 123 $#
 124 $# If you don't already have 'awk', or the version of awk you have seems not
 125 $# to work, download Brian Kernighan's awk (Brian Kernighan is the author of
 126 $# awk.)  You can find source code and a built executable (called awk95.exe)
 127 $# here:
 128 $#
 129 $#     http://www.cs.princeton.edu/~bwk/btl.mirror/
 130 $#
 131 $# The executable works just fine.
 132 $#
 133 $# If build issues errors after a change to pngconfig.dfa you have entered
 134 $# inconsistent feature requests, or even malformed requests, in
 135 $# pngconfig.dfa.  The error messages from awk should be comprehensible, but
 136 $# if not simply go back to the start (nothing but comments in this file) and
 137 $# enter configuration lines one by one until one produces an error.  (Or, of
 138 $# course, do the standard binary chop.)
 139 $#
 140 $# You need to rebuild everything after a change to pnglibconf.dfa - i.e. you
 141 $# must do Actions/Mark All Targets for Remake.  This is because the compiler
 142 $# generated dependency information (as of OpenWatcom 1.9) does not record the
 143 $# dependency on pnglibconf.h correctly.
 144 $#
 145 $# If awk isn't set then this file is bypassed.  If you just want the standard
 146 $# configuration it is automatically produced from the distributed version
 147 $# (scripts\pnglibconf.h.prebuilt) by editting PNG_API_RULE to 2 (to force use
 148 $# of the OpenWatcom library calling convention.)
 149 $#
 150 <<
 151
 152 clean:: .symbolic
 153  $(DELETE) ..\..\pnglibconf.h pnglibconf.* dfn.c *.out pngconfig.inf
 154  $(DELETE) *.obj *.mbr *.sym *.err *.pch libpng.mk
 155  $(DELETE) libpng.lib libpng.lbr libpng.lb1 libpng.cbr libpng.mk1
 156  $(DELETE) pngtest.exe pngtest.map pngtest.lk1 pngtest.mk1
 157  $(DELETE) pngvalid.exe pngvalid.map pngvalid.lk1 pngvalid.mk1
 158
 159 distclean:: clean .symbolic
 160  $(DELETE) zlib.inf awk.inf config.inf pngconfig.dfa