projects/owatcom/pngconfig.mak - third_party/libpng - Git at Google

 # 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 ..\..\pngconf.h
  $(DELETE) $@ dfn1.out dfn2.out
  $(AWK) -f ..\..\scripts\options.awk out=dfn1.out version=search ..\..\pngconf.h ..\..\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 empty 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:
 $#
 $#     https://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 editing 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
  $(DELETE) zlib.inf awk.inf config.inf pngconfig.dfa
	# This is an OpenWatcom make file which builds pnglibconf.h - the libpng
	# configuration header. You can ignore this file if you don't need to
	# configure libpng; a default configuration will be built.
	#
	# For more information build libpng.wpj under the IDE and then read the
	# generated files:
	#
	# config.inf: Basic configuration information for a standard build.
	# pngconfig.dfa: Advanced configuration for non-standard libpng builds.
	#
	DELETE=rm -f
	ECHO=echo
	COPY=copy
	#
	# If your configuration needs to test compiler flags when building
	# pnglibconf.h you may need to override the following on the wmake command
	# line:
	CFLAGS=
	CC=wcl386
	CPP=$(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 ..\..\pngconf.h
	$(DELETE) $@ dfn1.out dfn2.out
	$(AWK) -f ..\..\scripts\options.awk out=dfn1.out version=search ..\..\pngconf.h ..\..\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 empty 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:
	$#
	$# https://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 editing 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