[libpng15] Corrected Android builds and corrected libpng.vers with symbol

    prefixing This adds an API to set optimization options externally,
    providing an alternative and general solution for the non-portable
    run-time tests used by the ARM Neon code.  It also makes those tests
    compile and link on Android.
  The order of settings vs options in pnglibconf.h is reversed to allow
    settings to depend on options and options can now set (or override) the
    defaults for settings.

1 files changed, 128 insertions, 60 deletions

diff --git a/scripts/dfn.awk b/scripts/dfn.awk
index 910704594..89b92d5d9 100644
--- a/scripts/dfn.awk
+++ b/scripts/dfn.awk
@@ -61,75 +61,143 @@ $1 ~ /^PNG_DFN_END_SORT/{
 }
 
 /^[^"]*PNG_DFN *".*"[^"]*$/{
-    # A definition line, apparently correctly formated, extract the
-    # definition then replace any doubled "" that remain with a single
-    # double quote.  Notice that the original doubled double quotes
-    # may have been split by tokenization
-    orig=$0
-
-    if (gsub(/^[^"]*PNG_DFN *"/,"") != 1 || gsub(/"[^"]*$/, "") != 1) {
-	print "line", NR, "processing failed:"
+   # A definition line, apparently correctly formated, extract the
+   # definition then replace any doubled "" that remain with a single
+   # double quote.  Notice that the original doubled double quotes
+   # may have been split by tokenization
+   #
+   # Sometimes GCC splits the PNG_DFN lines, we know this has happened
+   # if the quotes aren't closed and must read another line.  In this
+   # case it is essential to reject lines that start '#' because those
+   # are introduced #line directives.
+   orig=$0
+   line=$0
+   lineno=FNR
+   if (lineno == "") lineno=NR
+
+   if (sub(/^[^"]*PNG_DFN *"/,"",line) != 1) {
+	print "line", lineno ": processing failed:"
 	print orig
-	print $0
 	err=1
-    } else {
+       next
+   } else {
 	++out_count
-    }
-
-    # Now examine quotes within the value:
-    #
-    #   @" - delete this and any following spaces
-    #   "@ - delete this and any original spaces
-    #   @' - replace this by a double quote
-    #
-    # This allows macro substitution by the C compiler thus:
-    #
-    #   #define first_name John
-    #   #define last_name Smith
-    #
-    #	PNG_DFN"#define name @'@" first_name "@ @" last_name "@@'"
-    #
-    # Might get C preprocessed to:
-    #
-    #   PNG_DFN "#define foo @'@" John "@ @" Smith "@@'"
-    #
-    # Which this script reduces to:
-    #
-    #	#define name "John Smith"
-    #
-    while (sub(/@" */, "")) {
-	if (!sub(/ *"@/, "")) {
-	    print "unbalanced @\" ... \"@ pair"
-	    err=1
-	    break
-	}
-    }
-
-    # Put any needed double quotes in
-    gsub(/@'/,"\"")
-
-    # Remove any trailing spaces (not really required, but for
-    # editorial consistency
-    sub(/ *$/, "")
-
-    if (sort)
-       array[$(sort)] = $0
-
-    else
-       print $0 >out
-    next
+   }
+
+   # Now examine quotes within the value:
+   #
+   #   @" - delete this and any following spaces
+   #   "@ - delete this and any preceding spaces
+   #   @' - replace this by a double quote
+   #
+   # This allows macro substitution by the C compiler thus:
+   #
+   #   #define first_name John
+   #   #define last_name Smith
+   #
+   #	PNG_DFN"#define name @'@" first_name "@ @" last_name "@@'"
+   #
+   # Might get C preprocessed to:
+   #
+   #   PNG_DFN "#define foo @'@" John "@ @" Smith "@@'"
+   #
+   # Which this script reduces to:
+   #
+   #	#define name "John Smith"
+   #
+   while (1) {
+      # While there is an @" remove it and the next "@
+      if (line ~ /@"/) {
+         if (line ~ /@".*"@/) {
+            # Do this special case first to avoid swallowing extra spaces
+            # before or after the @ stuff:
+            if (!sub(/@" *"@/, "", line)) {
+               # Ok, do it in pieces - there has to be a non-space between the
+               # two.  NOTE: really weird things happen if a leading @" is
+               # lost - the code will error out below (I believe).
+               if (!sub(/@" */, "", line) || !sub(/ *"@/, "", line)) {
+                  print "line", lineno, ": internal error:", orig
+                  exit 1
+               }
+            }
+         }
+
+         # There is no matching "@.  Assume a split line
+         else while (1) {
+            if (getline nextline) {
+               # If the line starts with '#' it is a preprocesor line directive
+               # from cc -E, skip it:
+               if (nextline !~ /^#/) {
+                  line = line " " nextline
+                  break
+               }
+            } else {
+               # This is end-of-input - probably a missig "@ on the first line:
+               print "line", lineno ": unbalanced @\" ... \"@ pair"
+               err=1
+               next
+            }
+         }
+
+         # Keep going until all the @" have gone
+         continue
+      }
+
+      # Attempt to remove a trailing " (not preceded by '@') - if this can
+      # be done stop now, if not assume a split line again
+      if (sub(/"[^"]*$/, "", line))
+         break
+
+      # Read another line
+      while (1) {
+         if (getline nextline) {
+            if (nextline !~ /^#/) {
+               line = line " " nextline
+               # Go back to stripping @" "@ pairs
+               break
+            }
+         } else {
+            print "line", lineno ": unterminated PNG_DFN string"
+            err=1
+            next
+         }
+      }
+   }
+
+   # Put any needed double quotes in (at the end, because these would otherwise
+   # interfere with the processing above.)
+   gsub(/@'/,"\"", line)
+
+   # Remove any trailing spaces (not really required, but for
+   # editorial consistency
+   sub(/ *$/, "", line)
+
+   # Remove trailing CR
+   sub(/
$/, "", line)
+
+   if (sort) {
+      if (split(line, parts) < sort) {
+         print "line", lineno ": missing sort field:", line
+         err=1
+      } else
+         array[parts[sort]] = line
+   }
+
+   else
+      print line >out
+   next
 }
 
 /PNG_DFN/{
-    print "line", NR, "incorrectly formated PNG_DFN line:"
-    print $0
-    err = 1
+   print "line", NR, "incorrectly formated PNG_DFN line:"
+   print $0
+   err = 1
 }
 
 END{
-    if (out_count > 0 || err > 0)
+   if (out_count > 0 || err > 0)
 	exit err
 
-    print "no definition lines found"
-    exit 1
+   print "no definition lines found"
+   exit 1
 }