| # This is an OpenWatcom make file which builds pnglibconf.h - the libpng |
| # configuration header. You can ignore this file if you don't need to |
| # configure libpng; a default configuration will be built. |
| # |
| # For more information build libpng.wpj under the IDE and then read the |
| # generated files: |
| # |
| # config.inf: Basic configuration information for a standard build. |
| # pngconfig.dfa: Advanced configuration for non-standard libpng builds. |
| # |
| DELETE=rm -f |
| ECHO=echo |
| COPY=copy |
| # |
| # If your configuration needs to test compiler flags when building |
| # pnglibconf.h you may need to override the following on the wmake command |
| # line: |
| CFLAGS= |
| CC=wcl386 |
| CPP=$(CC) -pw0 |
| # |
| # Read awk from the environment if set, else it can be set on the command |
| # line (the default approach is to set the %awk% environment variable in the |
| # IDE libpng.wpj 'before' rule - this setting is local.) |
| !ifdef %awk |
| AWK=$(%awk) |
| !endif |
| # |
| # pnglibconf.h must exist in the source directory, this is the final rule |
| # which copies the local built version (and this is the default target for |
| # this makefile.) |
| ..\..\pnglibconf.h: pnglibconf.h |
| $(COPY) pnglibconf.h $@ |
| |
| !ifdef AWK |
| # CPPFLAGS should contain the options to control the result, |
| # but DEFS and CFLAGS are also supported here, override |
| # as appropriate |
| DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS) |
| |
| pnglibconf.h: pnglibconf.dfn |
| $(DELETE) $@ dfn.c dfn1.out dfn2.out |
| $(ECHO) $#include "pnglibconf.dfn" >dfn.c |
| $(CPP) $(DFNFLAGS) dfn.c >dfn1.out |
| $(AWK) -f << dfn1.out >dfn2.out |
| /^.*PNG_DEFN_MAGIC-.*-PNG_DEFN_END.*$$/{ |
| sub(/^.*PNG_DEFN_MAGIC-/, "") |
| sub(/ *-PNG_DEFN_END.*$$/, "") |
| gsub(/ *@@@ */, "") |
| print |
| } |
| << |
| $(COPY) dfn2.out $@ |
| @type << >pngconfig.inf |
| This is a locally configurable build of libpng.lib; for configuration |
| instructions consult and edit projects/openwatcom/pngconfig.dfa |
| << |
| $(DELETE) dfn.c dfn1.out dfn2.out |
| |
| pnglibconf.dfn: ..\..\scripts\pnglibconf.dfa ..\..\scripts\options.awk pngconfig.dfa |
| $(DELETE) $@ dfn1.out dfn2.out |
| $(AWK) -f ..\..\scripts\options.awk out=dfn1.out ..\..\scripts\pnglibconf.dfa pngconfig.dfa $(DFA_XTRA) 1>&2 |
| $(AWK) -f ..\..\scripts\options.awk out=dfn2.out dfn1.out 1>&2 |
| $(COPY) dfn2.out $@ |
| $(DELETE) dfn1.out dfn2.out |
| |
| !else |
| # The following lines are used to copy scripts\pnglibconf.h.prebuilt and make |
| # the required change to the calling convention. |
| # |
| # By default libpng is built to use the __cdecl calling convention on |
| # Windows. This gives compatibility with MSVC and GCC. Unfortunately it |
| # does not work with OpenWatcom because OpenWatcom implements longjmp using |
| # the __watcall convention (compared with both MSVC and GCC which use __cdecl |
| # for library functions.) |
| # |
| # Thus the default must be changed to build on OpenWatcom and, once changed, |
| # the result will not be compatible with applications built using other |
| # compilers (in fact attempts to build will fail at compile time.) |
| # |
| pnglibconf.h: ..\..\scripts\pnglibconf.h.prebuilt .existsonly |
| @$(ECHO) . |
| @$(ECHO) . |
| @$(ECHO) $$(AWK) NOT AVAILABLE: COPYING scripts\pnglibconf.h.prebuilt |
| @$(ECHO) . |
| @$(ECHO) . |
| vi -q -k ":1,$$s/PNG_API_RULE 0$$/PNG_API_RULE 2/\n:w! $@\n:q!\n" ..\..\scripts\pnglibconf.h.prebuilt |
| @$(ECHO) . |
| @$(ECHO) . |
| @$(ECHO) YOU HAVE A DEFAULT CONFIGURATION BECAUSE YOU DO NOT HAVE AWK! |
| @$(ECHO) . |
| @$(ECHO) . |
| @type << >pngconfig.inf |
| This is the default configuration of libpng.lib, if you wish to |
| change the configuration please consult the instructions in |
| projects/owatcom/pngconfig.dfa. |
| << |
| |
| !endif |
| |
| # Make the default files |
| defaults: .symbolic |
| @$(COPY) << config.inf |
| $# The libpng project is incompletely configured. To complete configuration |
| $# please complete the following steps: |
| $# |
| $# 1) Edit the 'before' rule of libpng.wpj (from the IDE) to define the |
| $# locations of the zlib include file zlib.h and the built zlib library, |
| $# zlib.lib. |
| $# |
| $# 2) If you want to change libpng to a non-standard configuration also |
| $# change the definition of 'awk' in the before rule to the name of your |
| $# awk command. For more instructions on configuration read |
| $# pngconfig.dfa. |
| $# |
| $# 3) Delete this file (config.inf). |
| << |
| @$(COPY) << pngconfig.dfa |
| $# pngconfig.dfa: this file contains configuration options for libpng. |
| $# If emtpy the standard configuration will be built. For this file to be |
| $# used a working version of the program 'awk' is required and the program |
| $# must be identified in the 'before' rule of the project. |
| $# |
| $# If you don't already have 'awk', or the version of awk you have seems not |
| $# to work, download Brian Kernighan's awk (Brian Kernighan is the author of |
| $# awk.) You can find source code and a built executable (called awk95.exe) |
| $# here: |
| $# |
| $# http://www.cs.princeton.edu/~bwk/btl.mirror/ |
| $# |
| $# The executable works just fine. |
| $# |
| $# If build issues errors after a change to pngconfig.dfa you have entered |
| $# inconsistent feature requests, or even malformed requests, in |
| $# pngconfig.dfa. The error messages from awk should be comprehensible, but |
| $# if not simply go back to the start (nothing but comments in this file) and |
| $# enter configuration lines one by one until one produces an error. (Or, of |
| $# course, do the standard binary chop.) |
| $# |
| $# You need to rebuild everything after a change to pnglibconf.dfa - i.e. you |
| $# must do Actions/Mark All Targets for Remake. This is because the compiler |
| $# generated dependency information (as of OpenWatcom 1.9) does not record the |
| $# dependency on pnglibconf.h correctly. |
| $# |
| $# If awk isn't set then this file is bypassed. If you just want the standard |
| $# configuration it is automatically produced from the distributed version |
| $# (scripts\pnglibconf.h.prebuilt) by editting PNG_API_RULE to 2 (to force use |
| $# of the OpenWatcom library calling convention.) |
| $# |
| << |
| |
| clean:: .symbolic |
| $(DELETE) ..\..\pnglibconf.h pnglibconf.* dfn.c *.out pngconfig.inf |
| $(DELETE) *.obj *.mbr *.sym *.err *.pch libpng.mk |
| $(DELETE) libpng.lib libpng.lbr libpng.lb1 libpng.cbr libpng.mk1 |
| $(DELETE) pngtest.exe pngtest.map pngtest.lk1 pngtest.mk1 |
| $(DELETE) pngvalid.exe pngvalid.map pngvalid.lk1 pngvalid.mk1 |
| |
| distclean:: clean .symbolic |
| $(DELETE) zlib.inf awk.inf config.inf pngconfig.dfa |