zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libpng/libpng-1.6.37/scripts/options.awk b/ap/lib/libpng/libpng-1.6.37/scripts/options.awk
new file mode 100755
index 0000000..fef5dfd
--- /dev/null
+++ b/ap/lib/libpng/libpng-1.6.37/scripts/options.awk
@@ -0,0 +1,898 @@
+#!/bin/awk -f
+# scripts/options.awk - library build configuration control
+#
+# last changed in libpng version 1.6.11 - June 5, 2014
+#
+# Copyright (c) 1998-2014 Glenn Randers-Pehrson
+#
+# This code is released under the libpng license.
+# For conditions of distribution and use, see the disclaimer
+# and license in png.h
+
+# The output of this script is written to the file given by
+# the variable 'out'. The script is run twice, once with
+# an intermediate output file, 'options.tmp' then again on
+# that file to produce the final output:
+#
+# awk -f scripts/options.awk out=options.tmp scripts/options.dfa 1>&2
+# awk -f scripts/options.awk out=options.dfn options.tmp 1>&2
+#
+# Some options may be specified on the command line:
+#
+# deb=1 Causes debugging to be output
+# logunsupported=1 Causes all options to be recorded in the output
+# everything=off Causes all options to be disabled by default
+# everything=on Causes all options to be enabled by default
+#
+# If awk fails on your platform, try nawk instead.
+#
+# These options may also be specified in the original input file (and
+# are copied to the preprocessed file).
+
+BEGIN{
+ out="" # intermediate, preprocessed, file
+ pre=-1 # preprocess (first line)
+ version="libpng version unknown" # version information
+ version_file="" # where to find the version
+ err=0 # in-line exit sets this
+ # The following definitions prevent the C preprocessor noticing the lines
+ # that will be in the final output file. Some C preprocessors tokenise
+ # the lines, for example by inserting spaces around operators, and all
+ # C preprocessors notice lines that start with '#', most remove comments.
+ # The technique adopted here is to make the final output lines into
+ # C strings (enclosed in double quotes), preceded by PNG_DFN. As a
+ # consequence the output cannot contain a 'raw' double quote - instead put
+ # @' in, this will be replaced by a single " afterward. See the parser
+ # script dfn.awk for more capabilities (not required here). Note that if
+ # you need a " in a 'setting' in pnglibconf.dfa it must also be @'!
+ dq="@'" # For a single double quote
+ start=" PNG_DFN \"" # Start stuff to output (can't contain a "!)
+ end="\" " # End stuff to output
+ subs="@\" " # Substitute start (substitute a C macro)
+ sube=" \"@" # Substitute end
+ comment=start "/*" # Comment start
+ cend="*/" end # Comment end
+ def=start "#define PNG_" # Arbitrary define
+ sup="_SUPPORTED" end # end supported option
+ und=comment "#undef PNG_" # Unsupported option
+ une="_SUPPORTED" cend # end unsupported option
+ error=start "ERROR:" # error message, terminate with 'end'
+
+ # Variables
+ deb=0 # debug - set on command line
+ everything="" # do not override defaults
+ logunsupported=0 # write unsupported options too
+
+ # Precreate arrays
+ # for each option:
+ option[""] = "" # list of all options: default enabled/disabled
+ done[""] = 1 # marks option as having been output
+ requires[""] = "" # requires by option
+ iffs[""] = "" # if by option
+ enabledby[""] = "" # options that enable it by option
+ sets[""] = "" # settings set by each option
+ setval[""] = "" # value to set (indexed: 'option sets[option]')
+ # for each setting:
+ setting[""] = "" # requires by setting
+ defaults[""] = "" # used for a defaulted value
+ doneset[""] = 1 # marks setting as having been output
+ r[""] = "" # Temporary array
+
+ # For decorating the output file
+ protect = ""
+}
+
+# The output file must be specified before any input:
+out == "" {
+ print "out=output.file must be given on the command line"
+ err = 1
+ exit 1
+}
+
+# The very first line indicates whether we are reading pre-processed
+# input or not, this must come *first* because 'PREPROCESSED' needs
+# to be the very first line in the temporary file.
+pre == -1{
+ if ($0 == "PREPROCESSED") {
+ pre = 0
+ next
+ } else {
+ pre = 1
+ print "PREPROCESSED" >out
+ # And fall through to continue processing
+ }
+}
+
+# While pre-processing if version is set to "search" look for a version string
+# in the following file.
+pre && version == "search" && version_file == ""{
+ version_file = FILENAME
+}
+
+pre && version == "search" && version_file != FILENAME{
+ print "version string not found in", version_file
+ err = 1
+ exit 1
+}
+
+pre && version == "search" && $0 ~ /^ \* libpng version/{
+ version = substr($0, 4)
+ print "version =", version >out
+ next
+}
+
+pre && FILENAME == version_file{
+ next
+}
+
+# variable=value
+# Sets the given variable to the given value (the syntax is fairly
+# free form, except for deb (you are expected to understand how to
+# set the debug variable...)
+#
+# This happens before the check on 'pre' below skips most of the
+# rest of the actions, so the variable settings happen during
+# preprocessing but are recorded in the END action too. This
+# allows them to be set on the command line too.
+$0 ~ /^[ ]*version[ ]*=/{
+ sub(/^[ ]*version[ ]*=[ ]*/, "")
+ version = $0
+ next
+}
+$0 ~ /^[ ]*everything[ =]*off[ ]*$/{
+ everything = "off"
+ next
+}
+$0 ~ /^[ ]*everything[ =]*on[ ]*$/{
+ everything = "on"
+ next
+}
+$0 ~ /^[ ]*logunsupported[ =]*0[ ]*$/{
+ logunsupported = 0
+ next
+}
+$0 ~ /^[ ]*logunsupported[ =]*1[ ]*$/{
+ logunsupported = 1
+ next
+}
+$1 == "deb" && $2 == "=" && NF == 3{
+ deb = $3
+ next
+}
+
+# Preprocessing - this just copies the input file with lines
+# that need preprocessing (just chunk at present) expanded
+# The bare "pre" instead of "pre != 0" crashes under Sunos awk
+pre && $1 != "chunk"{
+ print >out
+ next
+}
+
+# The first characters of the line determine how it is processed,
+# leading spaces are ignored. In general tokens that are not
+# keywords are the names of options. An option 'name' is
+# controlled by the definition of the corresponding macros:
+#
+# PNG_name_SUPPORTED The option is turned on
+# PNG_NO_name
+# PNG_NO_name_SUPPORTED If the first macro is not defined
+# either of these will turn the option off
+#
+# If none of these macros are defined the option is turned on, unless
+# the keyword 'off' is given in a line relating to the option. The
+# keyword 'on' can also be given, but it will be ignored (since it is
+# the default.)
+#
+# In the syntax below a 'name' is indicated by "NAME", other macro
+# values are indicated by "MACRO", as with "NAME" the leading "PNG_"
+# is omitted, but in this case the "NO_" prefix and the "_SUPPORTED"
+# suffix are never used.
+#
+# Each line is introduced by a keyword - the first non-space characters
+# on the line. A line starting with a '#' is a comment - it is totally
+# ignored. Keywords are as follows, a NAME, is simply a macro name
+# without the leading PNG_, PNG_NO_ or the trailing _SUPPORTED.
+
+$1 ~ /^#/ || $0 ~ /^[ ]*$/{
+ next
+}
+
+# com <comment>
+# The whole line is placed in the output file as a comment with
+# the preceding 'com' removed
+$1 == "com"{
+ if (NF > 1) {
+ # sub(/^[ ]*com[ ]*/, "")
+ $1 = ""
+ print comment $0, cend >out
+ } else
+ print start end >out
+ next
+}
+
+# version
+# Inserts a version comment
+$1 == "version" && NF == 1{
+ if (version == "") {
+ print "ERROR: no version string set"
+ err = 1 # prevent END{} running
+ exit 1
+ }
+
+ print comment, version, cend >out
+ next
+}
+
+# file output input protect
+# Informational: the official name of the input file (without
+# make generated local directories), the official name of the
+# output file and, if required, a name to use in a protection
+# macro for the contents.
+$1 == "file" && NF >= 2{
+ print comment, $2, cend >out
+ print comment, "Machine generated file: DO NOT EDIT", cend >out
+ if (NF >= 3)
+ print comment, "Derived from:", $3, cend >out
+ protect = $4
+ if (protect != "") {
+ print start "#ifndef", protect end >out
+ print start "#define", protect end >out
+ }
+ next
+}
+
+# option NAME ( (requires|enables|if) NAME* | on | off | disabled |
+# sets SETTING VALUE+ )*
+#
+# Declares an option 'NAME' and describes its default setting (disabled)
+# and its relationship to other options. The option is disabled
+# unless *all* the options listed after 'requires' are set and at
+# least one of the options listed after 'if' is set. If the
+# option is set then it turns on all the options listed after 'enables'.
+#
+# Note that "enables" takes priority over the required/if/disabled/off
+# setting of the target option.
+#
+# The definition file may list an option as 'disabled': off by default,
+# otherwise the option is enabled: on by default. A later (and it must
+# be later) entry may turn an option on or off explicitly.
+
+$1 == "option" && NF >= 2{
+ opt = $2
+ sub(/,$/,"",opt)
+ onoff = option[opt] # records current (and the default is "", enabled)
+ key = ""
+ istart = 3
+ do {
+ if (istart == 1) { # continuation line
+ val = getline
+
+ if (val != 1) { # error reading it
+ if (val == 0)
+ print "option", opt ": ERROR: missing continuation line"
+ else
+ print "option", opt ": ERROR: error reading continuation line"
+
+ # This is a hard error
+ err = 1 # prevent END{} running
+ exit 1
+ }
+ }
+
+ for (i=istart; i<=NF; ++i) {
+ val=$(i)
+ sub(/,$/,"",val)
+ if (val == "on" || val == "off" || val == "disabled" || val =="enabled") {
+ key = ""
+ if (onoff != val) {
+ # on or off can zap disabled or enabled:
+ if (onoff == "" || (onoff == "disabled" || onoff == "enabled") &&
+ (val == "on" || val == "off")) {
+ # It's easy to mis-spell the option when turning it
+ # on or off, so warn about it here:
+ if (onoff == "" && (val == "on" || val == "off")) {
+ print "option", opt ": ERROR: turning unrecognized option", val
+ # For the moment error out - it is safer
+ err = 1 # prevent END{} running
+ exit 1
+ }
+ onoff = val
+ } else {
+ # Print a message, otherwise the error
+ # below is incomprehensible
+ print "option", opt ": currently", onoff ": attempt to turn", val
+ break
+ }
+ }
+ } else if (val == "requires" || val == "if" || val == "enables" || val =="sets") {
+ key = val
+ } else if (key == "requires") {
+ requires[opt] = requires[opt] " " val
+ } else if (key == "if") {
+ iffs[opt] = iffs[opt] " " val
+ } else if (key == "enables") {
+ enabledby[val] = enabledby[val] " " opt
+ } else if (key == "sets") {
+ sets[opt] = sets[opt] " " val
+ key = "setval"
+ set = val
+ } else if (key == "setval") {
+ setval[opt " " set] = setval[opt " " set] " " val
+ } else
+ break # bad line format
+ }
+
+ istart = 1
+ } while (i > NF && $0 ~ /,$/)
+
+ if (i > NF) {
+ # Set the option, defaulting to 'enabled'
+ if (onoff == "") onoff = "enabled"
+ option[opt] = onoff
+ next
+ }
+ # Else fall through to the error handler
+}
+
+# chunk NAME [requires OPT] [enables LIST] [on|off|disabled]
+# Expands to the 'option' settings appropriate to the reading and
+# writing of an ancillary PNG chunk 'NAME':
+#
+# option READ_NAME requires READ_ANCILLARY_CHUNKS [READ_OPT]
+# option READ_NAME enables NAME LIST
+# [option READ_NAME off]
+# option WRITE_NAME requires WRITE_ANCILLARY_CHUNKS [WRITE_OPT]
+# option WRITE_NAME enables NAME LIST
+# [option WRITE_NAME off]
+
+pre != 0 && $1 == "chunk" && NF >= 2{
+ # 'chunk' is handled on the first pass by writing appropriate
+ # 'option' lines into the intermediate file.
+ opt = $2
+ sub(/,$/,"",opt)
+ onoff = ""
+ reqread = ""
+ reqwrite = ""
+ enables = ""
+ req = 0
+ istart = 3
+ do {
+ if (istart == 1) { # continuation line
+ val = getline
+
+ if (val != 1) { # error reading it
+ if (val == 0)
+ print "chunk", opt ": ERROR: missing continuation line"
+ else
+ print "chunk", opt ": ERROR: error reading continuation line"
+
+ # This is a hard error
+ err = 1 # prevent END{} running
+ exit 1
+ }
+ }
+
+ # read the keywords/additional OPTS
+ for (i=istart; i<=NF; ++i) {
+ val = $(i)
+ sub(/,$/,"",val)
+ if (val == "on" || val == "off" || val == "disabled") {
+ if (onoff != val) {
+ if (onoff == "")
+ onoff = val
+ else
+ break # on/off conflict
+ }
+ req = 0
+ } else if (val == "requires")
+ req = 1
+ else if (val == "enables")
+ req = 2
+ else if (req == 1){
+ reqread = reqread " READ_" val
+ reqwrite = reqwrite " WRITE_" val
+ } else if (req == 2)
+ enables = enables " " val
+ else
+ break # bad line: handled below
+ }
+
+ istart = 1
+ } while (i > NF && $0 ~ /,$/)
+
+ if (i > NF) {
+ # Output new 'option' lines to the intermediate file (out)
+ print "option READ_" opt, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", opt enables , onoff >out
+ print "option WRITE_" opt, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", opt enables, onoff >out
+ next
+ }
+ # Else hit the error handler below - bad line format!
+}
+
+# setting MACRO ( requires MACRO* )* [ default VALUE ]
+# Behaves in a similar way to 'option' without looking for NO_ or
+# _SUPPORTED; the macro is enabled if it is defined so long as all
+# the 'requires' macros are also defined. The definitions may be
+# empty, an error will be issued if the 'requires' macros are
+# *not* defined. If given the 'default' value is used if the
+# macro is not defined. The default value will be re-tokenised.
+# (BTW: this is somewhat restrictive, it mainly exists for the
+# support of non-standard configurations and numeric parameters,
+# see the uses in scripts/options.dat
+
+$1 == "setting" && (NF == 2 || NF >= 3 && ($3 == "requires" || $3 == "default")){
+ reqs = ""
+ deflt = ""
+ isdef = 0
+ key = ""
+ for (i=3; i<=NF; ++i)
+ if ($(i) == "requires" || $(i) == "default") {
+ key = $(i)
+ if (key == "default") isdef = 1
+ } else if (key == "requires")
+ reqs = reqs " " $(i)
+ else if (key == "default")
+ deflt = deflt " " $(i)
+ else
+ break # Format error, handled below
+
+ setting[$2] = reqs
+ # NOTE: this overwrites a previous value silently
+ if (isdef && deflt == "")
+ deflt = " " # as a flag to force output
+ defaults[$2] = deflt
+ next
+}
+
+# The order of the dependency lines (option, chunk, setting) is irrelevant
+# - the 'enables', 'requires' and 'if' settings will be used to determine
+# the correct order in the output and the final values in pnglibconf.h are
+# not order dependent. 'requires' and 'if' entries take precedence over
+# 'enables' from other options; if an option requires another option it
+# won't be set regardless of any options that enable it unless the other
+# option is also enabled.
+#
+# Similarly 'enables' trumps a NO_ definition in CFLAGS or pngusr.h
+#
+# For simplicity cycles in the definitions are regarded as errors,
+# even if they are not ambiguous.
+# A given NAME can be specified in as many 'option' lines as required, the
+# definitions are additive.
+
+# For backwards compatibility equivalent macros may be listed thus:
+#
+# = [NO_]NAME MACRO
+# Makes -DMACRO equivalent to -DPNG_NO_NAME or -DPNG_NAME_SUPPORTED
+# as appropriate.
+#
+# The definition is injected into the C compiler input when encountered
+# in the second pass (so all these definitions appear *after* the @
+# lines!)
+#
+# 'NAME' is as above, but 'MACRO' is the full text of the equivalent
+# old, deprecated, macro.
+
+$1 == "=" && NF == 3{
+ print "#ifdef PNG_" $3 >out
+ if ($2 ~ /^NO_/)
+ print "# define PNG_" $2 >out
+ else
+ print "# define PNG_" $2 "_SUPPORTED" >out
+ print "#endif" >out
+ next
+}
+
+# Lines may be injected into the C compiler input by preceding them
+# with an "@" character. The line is copied with just the leading
+# @ removed.
+
+$1 ~ /^@/{
+ # sub(/^[ ]*@/, "")
+ $1 = substr($1, 2)
+ print >out
+ next
+}
+
+# Check for unrecognized lines, because of the preprocessing chunk
+# format errors will be detected on the first pass independent of
+# any other format errors.
+{
+ print "options.awk: bad line (" NR "):", $0
+ err = 1 # prevent END{} running
+ exit 1
+}
+
+# For checking purposes names that start with "ok_" or "fail_" are
+# not output to pnglibconf.h and must be either enabled or disabled
+# respectively for the build to succeed. This allows interdependencies
+# between options of the form "at least one of" or "at most one of"
+# to be checked. For example:
+#
+# option FLOATING_POINT enables ok_math
+# option FIXED_POINT enables ok_math
+# This ensures that at least one of FLOATING_POINT and FIXED_POINT
+# must be set for the build to succeed.
+#
+# option fail_math requires FLOATING_POINT FIXED_POINT
+# This means the build will fail if *both* FLOATING_POINT and
+# FIXED_POINT are set (this is an example; in fact both are allowed.)
+#
+# If all these options were given the build would require exactly one
+# of the names to be enabled.
+
+END{
+ # END{} gets run on an exit (a traditional awk feature)
+ if (err) exit 1
+
+ if (pre) {
+ # Record the final value of the variables
+ print "deb =", deb >out
+ if (everything != "") {
+ print "everything =", everything >out
+ }
+ print "logunsupported =", logunsupported >out
+ exit 0
+ }
+
+ # Do the options first (allowing options to set settings). The dependency
+ # tree is thus:
+ #
+ # name > name
+ # name requires name
+ # name if name
+ # name enabledby name
+ #
+ # First build a list 'tree' by option of all the things on which
+ # it depends.
+ print "" >out
+ print "/* OPTIONS */" >out
+ print comment, "options", cend >out
+ for (opt in enabledby) tree[opt] = 1 # may not be explicit options
+ for (opt in option) if (opt != "") {
+ o = option[opt]
+ # option should always be one of the following values
+ if (o != "on" && o != "off" && o != "disabled" && o != "enabled") {
+ print "internal option error (" o ")"
+ exit 1
+ }
+ tree[opt] = "" # so unlisted options marked
+ }
+ for (opt in tree) if (opt != "") {
+ if (tree[opt] == 1) {
+ tree[opt] = ""
+ if (option[opt] != "") {
+ print "internal error (1)"
+ exit 1
+ }
+ # Macros only listed in 'enables' remain off unless
+ # one of the enabling macros is on.
+ option[opt] = "disabled"
+ }
+
+ split("", list) # clear 'list'
+ # Now add every requires, iffs or enabledby entry to 'list'
+ # so that we can add a unique list of requirements to tree[i]
+ split(requires[opt] iffs[opt] enabledby[opt], r)
+ for (i in r) list[r[i]] = 1
+ for (i in list) tree[opt] = tree[opt] " " i
+ }
+
+ # print the tree for extreme debugging
+ if (deb > 2) for (i in tree) if (i != "") print i, "depends-on" tree[i]
+
+ # Ok, now check all options marked explicitly 'on' or 'off':
+ #
+ # If an option[opt] is 'on' then turn on all requires[opt]
+ # If an option[opt] is 'off' then turn off all enabledby[opt]
+ #
+ # Error out if we have to turn 'on' to an 'off' option or vice versa.
+ npending = 0
+ for (opt in option) if (opt != "") {
+ if (option[opt] == "on" || option[opt] == "off") {
+ pending[++npending] = opt
+ }
+ }
+
+ err = 0 # set on error
+ while (npending > 0) {
+ opt = pending[npending--]
+ if (option[opt] == "on") {
+ nreqs = split(requires[opt], r)
+ for (j=1; j<=nreqs; ++j) {
+ if (option[r[j]] == "off") {
+ print "option", opt, "turned on, but requirement", r[j], "is turned off"
+ err = 1
+ } else if (option[r[j]] != "on") {
+ option[r[j]] = "on"
+ pending[++npending] = r[j]
+ }
+ }
+ } else {
+ if (option[opt] != "off") {
+ print "internal error (2)"
+ exit 1
+ }
+ nreqs = split(enabledby[opt], r)
+ for (j=1; j<=nreqs; ++j) {
+ if (option[r[j]] == "on") {
+ print "option", opt, "turned off, but enabled by", r[j], "which is turned on"
+ err = 1
+ } else if (option[r[j]] != "off") {
+ option[r[j]] = "off"
+ pending[++npending] = r[j]
+ }
+ }
+ }
+ }
+ if (err) exit 1
+
+ # Sort options:
+ print "PNG_DFN_START_SORT 2" >out
+
+ # option[i] is now the complete list of all the tokens we may
+ # need to output, go through it as above, depth first.
+ finished = 0
+ while (!finished) {
+ finished = 1
+ movement = 0 # done nothing
+ for (i in option) if (!done[i]) {
+ nreqs = split(tree[i], r)
+ if (nreqs > 0) {
+ for (j=1; j<=nreqs; ++j) if (!done[r[j]]) {
+ break
+ }
+ if (j<=nreqs) {
+ finished = 0
+ continue # next option
+ }
+ }
+
+ # All the requirements have been processed, output
+ # this option. An option is _SUPPORTED if:
+ #
+ # all 'requires' are _SUPPORTED AND
+ # at least one of the 'if' options are _SUPPORTED AND
+ # EITHER:
+ # The name is _SUPPORTED (on the command line)
+ # OR:
+ # an 'enabledby' is _SUPPORTED
+ # OR:
+ # NO_name is not defined AND
+ # the option is not disabled; an option is disabled if:
+ # option == off
+ # option == disabled && everything != on
+ # option == "" && everything == off
+ if (deb) print "option", i
+ print "" >out
+ print "/* option:", i, option[i] >out
+ print " * requires: " requires[i] >out
+ print " * if: " iffs[i] >out
+ print " * enabled-by:" enabledby[i] >out
+ print " * sets: " sets[i], "*/" >out
+ print "#undef PNG_on" >out
+ print "#define PNG_on 1" >out
+
+ # requires
+ nreqs = split(requires[i], r)
+ for (j=1; j<=nreqs; ++j) {
+ print "#ifndef PNG_" r[j] "_SUPPORTED" >out
+ print "# undef PNG_on /*!" r[j] "*/" >out
+ # This error appears in the final output if something
+ # was switched 'on' but the processing above to force
+ # the requires did not work
+ if (option[i] == "on") {
+ print error, i, "requires", r[j] end >out
+ }
+ print "#endif" >out
+ }
+
+ # if
+ have_ifs = 0
+ nreqs = split(iffs[i], r)
+ print "#undef PNG_no_if" >out
+ if (nreqs > 0) {
+ have_ifs = 1
+ print "/* if" iffs[i], "*/" >out
+ print "#define PNG_no_if 1" >out
+ for (j=1; j<=nreqs; ++j) {
+ print "#ifdef PNG_" r[j] "_SUPPORTED" >out
+ print "# undef PNG_no_if /*" r[j] "*/" >out
+ print "#endif" >out
+ }
+ print "#ifdef PNG_no_if /*missing if*/" >out
+ print "# undef PNG_on" >out
+ # There is no checking above for this, because we
+ # don't know which 'if' to choose, so whine about
+ # it here:
+ if (option[i] == "on") {
+ print error, i, "needs one of:", iffs[i] end >out
+ }
+ print "#endif" >out
+ }
+
+ print "#ifdef PNG_on /*requires, if*/" >out
+ # enables
+ print "# undef PNG_not_enabled" >out
+ print "# define PNG_not_enabled 1" >out
+ print " /* enabled by" enabledby[i], "*/" >out
+ nreqs = split(enabledby[i], r)
+ for (j=1; j<=nreqs; ++j) {
+ print "#ifdef PNG_" r[j] "_SUPPORTED" >out
+ print "# undef PNG_not_enabled /*" r[j] "*/" >out
+ # Oops, probably not intended (should be factored
+ # out by the checks above).
+ if (option[i] == "off") {
+ print error, i, "enabled by:", r[j] end >out
+ }
+ print "#endif" >out
+ }
+
+ print "# ifndef PNG_" i "_SUPPORTED /*!command line*/" >out
+ print "# ifdef PNG_not_enabled /*!enabled*/" >out
+ # 'have_ifs' here means that everything = "off" still allows an 'if' on
+ # an otherwise enabled option to turn it on; otherwise the 'if'
+ # handling is effectively disabled by 'everything = off'
+ if (option[i] == "off" || option[i] == "disabled" && everything != "on" || option[i] == "enabled" && everything == "off" && !have_ifs) {
+ print "# undef PNG_on /*default off*/" >out
+ } else {
+ print "# ifdef PNG_NO_" i >out
+ print "# undef PNG_on /*turned off*/" >out
+ print "# endif" >out
+ print "# ifdef PNG_NO_" i "_SUPPORTED" >out
+ print "# undef PNG_on /*turned off*/" >out
+ print "# endif" >out
+ }
+ print "# endif /*!enabled*/" >out
+ print "# ifdef PNG_on" >out
+ # The _SUPPORTED macro must be defined so that dependent
+ # options output later work.
+ print "# define PNG_" i "_SUPPORTED" >out
+ print "# endif" >out
+ print "# endif /*!command line*/" >out
+ # If PNG_on is still set the option should be defined in
+ # pnglibconf.h
+ print "# ifdef PNG_on" >out
+ if (i ~ /^fail_/) {
+ print error, i, "is on: enabled by:" iffs[i] enabledby[i] ", requires" requires[i] end >out
+ } else if (i !~ /^ok_/) {
+ print def i sup >out
+ # Supported option, set required settings
+ nreqs = split(sets[i], r)
+ for (j=1; j<=nreqs; ++j) {
+ print "# ifdef PNG_set_" r[j] >out
+ # Some other option has already set a value:
+ print error, i, "sets", r[j] ": duplicate setting" end >out
+ print error, " previous value: " end "PNG_set_" r[j] >out
+ print "# else" >out
+ # Else set the default: note that this won't accept arbitrary
+ # values, the setval string must be acceptable to all the C
+ # compilers we use. That means it must be VERY simple; a number,
+ # a name or a string.
+ print "# define PNG_set_" r[j], setval[i " " r[j]] >out
+ print "# endif" >out
+ }
+ }
+ print "# endif /* definition */" >out
+ print "#endif /*requires, if*/" >out
+ if (logunsupported || i ~ /^ok_/) {
+ print "#ifndef PNG_on" >out
+ if (logunsupported) {
+ print und i une >out
+ }
+ if (i ~ /^ok_/) {
+ print error, i, "not enabled: requires:" requires[i] ", enabled by:" iffs[i] enabledby[i] end >out
+ }
+ print "#endif" >out
+ }
+
+ done[i] = 1
+ ++movement
+ }
+
+ if (!finished && !movement) {
+ print "option: loop or missing option in dependency tree, cannot process:"
+ for (i in option) if (!done[i]) {
+ print " option", i, "depends on" tree[i], "needs:"
+ nreqs = split(tree[i], r)
+ if (nreqs > 0) for (j=1; j<=nreqs; ++j) if (!done[r[j]]) {
+ print " " r[j]
+ }
+ }
+ exit 1
+ }
+ }
+ print "PNG_DFN_END_SORT" >out
+ print comment, "end of options", cend >out
+
+ # Do the 'setting' values second, the algorithm the standard
+ # tree walk (O(1)) done in an O(2) while/for loop; iterations
+ # settings x depth, outputting the deepest required macros
+ # first.
+ print "" >out
+ print "/* SETTINGS */" >out
+ print comment, "settings", cend >out
+ # Sort (in dfn.awk) on field 2, the setting name
+ print "PNG_DFN_START_SORT 2" >out
+ finished = 0
+ while (!finished) {
+ finished = 1
+ movement = 0 # done nothing
+ for (i in setting) if (!doneset[i]) {
+ nreqs = split(setting[i], r)
+ if (nreqs > 0) {
+ # By default assume the requires values are options, but if there
+ # is no option with that name check for a setting
+ for (j=1; j<=nreqs; ++j) if (option[r[j]] == "" && !doneset[r[j]]) {
+ break
+ }
+ if (j<=nreqs) {
+ finished = 0
+ continue # try a different setting
+ }
+ }
+
+ # All the requirements have been processed, output
+ # this setting.
+ if (deb) print "setting", i
+ deflt = defaults[i]
+ # Remove any spurious trailing spaces
+ sub(/ *$/,"",deflt)
+ # A leading @ means leave it unquoted so the preprocessor
+ # can substitute the build time value
+ if (deflt ~ /^ @/)
+ deflt = " " subs substr(deflt, 3) sube
+ print "" >out
+ print "/* setting: ", i >out
+ print " * requires:" setting[i] >out
+ print " * default: ", defaults[i] deflt, "*/" >out
+ for (j=1; j<=nreqs; ++j) {
+ if (option[r[j]] != "")
+ print "#ifndef PNG_" r[j] "_SUPPORTED" >out
+ else
+ print "#ifndef PNG_" r[j] >out
+ print error, i, "requires", r[j] end >out
+ print "# endif" >out
+ }
+ # The precedence is:
+ #
+ # 1) External definition; trumps:
+ # 2) Option 'sets' value; trumps:
+ # 3) Setting 'default'
+ #
+ print "#ifdef PNG_" i >out
+ # PNG_<i> is defined, so substitute the value:
+ print def i, subs "PNG_" i sube end >out
+ print "#else /* use default */" >out
+ print "# ifdef PNG_set_" i >out
+ # Value from an option 'sets' argument
+ print def i, subs "PNG_set_" i sube end >out
+ # This is so that subsequent tests on the setting work:
+ print "# define PNG_" i, "1" >out
+ if (defaults[i] != "") {
+ print "# else /*default*/" >out
+ print def i deflt end >out
+ print "# define PNG_" i, "1" >out
+ }
+ print "# endif /* defaults */" >out
+ print "#endif /* setting", i, "*/" >out
+
+ doneset[i] = 1
+ ++movement
+ }
+
+ if (!finished && !movement) {
+ print "setting: loop or missing setting in 'requires', cannot process:"
+ for (i in setting) if (!doneset[i]) {
+ print " setting", i, "requires" setting[i]
+ }
+ exit 1
+ }
+ }
+ print "PNG_DFN_END_SORT" >out
+ print comment, "end of settings", cend >out
+
+ # Regular end - everything looks ok
+ if (protect != "") {
+ print start "#endif", "/*", protect, "*/" end >out
+ }
+}