0eadc27cd6
scripts/makefile.watcom. This project works with OpenWatcom 1.9. The
IDE autogenerates appropriate makefiles (libpng.mk) for batch processing.
The project is configurable, unlike the Visual Studio project, so long
as the developer has an awk.
161 lines
6.0 KiB
Makefile
161 lines
6.0 KiB
Makefile
# This is an OpenWatcom make file which builds pnglibconf.h - the libpng
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# configuration header. You can ignore this file if you don't need to
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# configure libpng; a default configuration will be built.
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#
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# For more information build libpng.wpj under the IDE and then read the
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# generated files:
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#
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# config.inf: Basic configuration information for a standard build.
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# pngconfig.dfa: Advanced configuration for non-standard libpng builds.
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#
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DELETE=rm -f
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ECHO=echo
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COPY=copy
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#
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# If your configuration needs to test compiler flags when building
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# pnglibconf.h you may need to override the following on the wmake command
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# line:
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CFLAGS=
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CC=wcl386
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CPP=$(CC) -pw0
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#
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# Read awk from the environment if set, else it can be set on the command
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# line (the default approach is to set the %awk% environment variable in the
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# IDE libpng.wpj 'before' rule - this setting is local.)
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!ifdef %awk
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AWK=$(%awk)
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!endif
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#
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# pnglibconf.h must exist in the source directory, this is the final rule
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# which copies the local built version (and this is the default target for
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# this makefile.)
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..\..\pnglibconf.h: pnglibconf.h
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$(COPY) pnglibconf.h $@
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!ifdef AWK
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# CPPFLAGS should contain the options to control the result,
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# but DEFS and CFLAGS are also supported here, override
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# as appropriate
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DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS)
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pnglibconf.h: pnglibconf.dfn
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$(DELETE) $@ dfn.c dfn1.out dfn2.out
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$(ECHO) $#include "pnglibconf.dfn" >dfn.c
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$(CPP) $(DFNFLAGS) dfn.c >dfn1.out
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$(AWK) -f << dfn1.out >dfn2.out
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/^.*PNG_DEFN_MAGIC-.*-PNG_DEFN_END.*$$/{
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sub(/^.*PNG_DEFN_MAGIC-/, "")
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sub(/ *-PNG_DEFN_END.*$$/, "")
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gsub(/ *@@@ */, "")
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print
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}
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<<
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$(COPY) dfn2.out $@
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@type << >pngconfig.inf
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This is a locally configurable build of libpng.lib; for configuration
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instructions consult and edit projects/openwatcom/pngconfig.dfa
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<<
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$(DELETE) dfn.c dfn1.out dfn2.out
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pnglibconf.dfn: ..\..\scripts\pnglibconf.dfa ..\..\scripts\options.awk pngconfig.dfa
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$(DELETE) $@ dfn1.out dfn2.out
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$(AWK) -f ..\..\scripts\options.awk out=dfn1.out ..\..\scripts\pnglibconf.dfa pngconfig.dfa $(DFA_XTRA) 1>&2
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$(AWK) -f ..\..\scripts\options.awk out=dfn2.out dfn1.out 1>&2
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$(COPY) dfn2.out $@
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$(DELETE) dfn1.out dfn2.out
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!else
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# The following lines are used to copy scripts\pnglibconf.h.prebuilt and make
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# the required change to the calling convention.
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#
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# By default libpng is built to use the __cdecl calling convention on
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# Windows. This gives compatibility with MSVC and GCC. Unfortunately it
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# does not work with OpenWatcom because OpenWatcom implements longjmp using
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# the __watcall convention (compared with both MSVC and GCC which use __cdecl
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# for library functions.)
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#
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# Thus the default must be changed to build on OpenWatcom and, once changed,
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# the result will not be compatible with applications built using other
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# compilers (in fact attempts to build will fail at compile time.)
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#
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pnglibconf.h: ..\..\scripts\pnglibconf.h.prebuilt .existsonly
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@$(ECHO) .
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@$(ECHO) .
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@$(ECHO) $$(AWK) NOT AVAILABLE: COPYING scripts\pnglibconf.h.prebuilt
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@$(ECHO) .
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@$(ECHO) .
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vi -q -k ":1,$$s/PNG_API_RULE 0$$/PNG_API_RULE 2/\n:w! $@\n:q!\n" ..\..\scripts\pnglibconf.h.prebuilt
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@$(ECHO) .
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@$(ECHO) .
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@$(ECHO) YOU HAVE A DEFAULT CONFIGURATION BECAUSE YOU DO NOT HAVE AWK!
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@$(ECHO) .
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@$(ECHO) .
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@type << >pngconfig.inf
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This is the default configuration of libpng.lib, if you wish to
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change the configuration please consult the instructions in
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projects/owatcom/pngconfig.dfa.
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<<
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!endif
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# Make the default files
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defaults: .symbolic
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@$(COPY) << config.inf
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$# The libpng project is incompletely configured. To complete configuration
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$# please complete the following steps:
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$#
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$# 1) Edit the 'before' rule of libpng.wpj (from the IDE) to define the
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$# locations of the zlib include file zlib.h and the built zlib library,
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$# zlib.lib.
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$#
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$# 2) If you want to change libpng to a non-standard configuration also
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$# change the definition of 'awk' in the before rule to the name of your
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$# awk command. For more instructions on configuration read
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$# pngconfig.dfa.
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$#
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$# 3) Delete this file (config.inf).
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<<
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@$(COPY) << pngconfig.dfa
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$# pngconfig.dfa: this file contains configuration options for libpng.
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$# If emtpy the standard configuration will be built. For this file to be
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$# used a working version of the program 'awk' is required and the program
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$# must be identified in the 'before' rule of the project.
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$#
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$# If you don't already have 'awk', or the version of awk you have seems not
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$# to work, download Brian Kernighan's awk (Brian Kernighan is the author of
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$# awk.) You can find source code and a built executable (called awk95.exe)
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$# here:
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$#
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$# http://www.cs.princeton.edu/~bwk/btl.mirror/
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$#
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$# The executable works just fine.
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$#
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$# If build issues errors after a change to pngconfig.dfa you have entered
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$# inconsistent feature requests, or even malformed requests, in
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$# pngconfig.dfa. The error messages from awk should be comprehensible, but
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$# if not simply go back to the start (nothing but comments in this file) and
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$# enter configuration lines one by one until one produces an error. (Or, of
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$# course, do the standard binary chop.)
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$#
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$# You need to rebuild everything after a change to pnglibconf.dfa - i.e. you
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$# must do Actions/Mark All Targets for Remake. This is because the compiler
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$# generated dependency information (as of OpenWatcom 1.9) does not record the
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$# dependency on pnglibconf.h correctly.
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$#
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$# If awk isn't set then this file is bypassed. If you just want the standard
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$# configuration it is automatically produced from the distributed version
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$# (scripts\pnglibconf.h.prebuilt) by editting PNG_API_RULE to 2 (to force use
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$# of the OpenWatcom library calling convention.)
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$#
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<<
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clean:: .symbolic
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$(DELETE) ..\..\pnglibconf.h pnglibconf.* dfn.c *.out pngconfig.inf
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$(DELETE) *.obj *.mbr *.sym *.err *.pch libpng.mk
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$(DELETE) libpng.lib libpng.lbr libpng.lb1 libpng.cbr libpng.mk1
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$(DELETE) pngtest.exe pngtest.map pngtest.lk1 pngtest.mk1
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$(DELETE) pngvalid.exe pngvalid.map pngvalid.lk1 pngvalid.mk1
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distclean:: clean .symbolic
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$(DELETE) zlib.inf awk.inf config.inf pngconfig.dfa
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