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