[gs-devel] 8.64: issue with -dPDFA and an old compiler

[Giulio Orsero]

Due to a need for PDF/A-1b I compiled 8.64 on Linux RHEL5, RHEL3 and RH6x.
RH6x shipped a long time ago with egcs-2.91.66.

On RHEL3/5 I could create PDF/A fine, while on RH6x I would get corrupted
PDF/A (normal PDFs were OK, only -dPDFA triggered the problem): no apparent
errors on gs side, but Acrobat would display incomplete PDFs.

I noticed that PDF/A created on the rh6x system contained strings like

	/Subtype/Type1C
	/Metadata -2147483648 0 R/Length 1834>>stream

(ie 32bit overflow) while PDF/A created on RHEL3/5 had

	/Subtype/Type1C/Length 1834>>stream

by reading the source I saw that font metadata has been disabled so that
"/Metadata" should never show up.

I solved the issue on the egcs-2.91.66 system with this:

--- base/gdevpdtb.c.orig        Wed Apr 22 15:19:25 2009
+++ base/gdevpdtb.c     Wed Apr 22 15:19:42 2009
@@ -634,6 +634,7 @@
        code = pdf_end_fontfile(pdev, &writer);
        if (pdev->PDFA && code >= 0) {
            gs_id metadata_object_id;
+           metadata_object_id = 0;
 
            code = pdf_font_metadata(pdev, pbfont, digest, sizeof(digest),
&metadata_object_id);
            if (metadata_object_id && code >= 0) {


Maybe you could always initialize it explicitly to cater for old/broken
compilers?

Thanks

-- 
giulioo at pobox.com