Re: [NTG-pdftex] gcc 4.1.2@ubuntu breaks pdftex

On 10/8/07, Martin Schröder wrote:

2007/10/6, George N. White III :

...

Why not file a bug report against gcc and wait a while to see if clarity emerges? It may be a plain bug in gcc so the code can be left as is and the flags changed until most people have the fixed version, or a case where the optimizer sometimes makes bad choices and you are better off changing the code to circumvent the issue.

I did better: I asked the gcc experts for help -- and got it. See http://gcc.gnu.org/ml/gcc-help/2007-10/msg00076.html and the followups

Christoph Bartoschek deserves our thanks. I can confirm that building pdftoeps.o with -DDISABLE_OUTLINE fixes the pdf file inclusion error. The problem is quite easy to see once you know where to look -- for the record, the problem is the build system which allowed PDFDoc.h to be compiled with different macro definitions. In a build log, compare the definitions used to build in libs/xpdf/xpdf with those used for pdftoepdf.cc. The #defines in question are set in src/libs/xpdf/xpdf/Makefile.in, so there is no easy way for autoconf in pdftexdir to find them. You could just copy the flags from libs/xpdf/xpdf/Makefile.in to texk/web2c/pdftexdif/Makefile.in or add the corresponding #defines to pdflib.h. Since the latter has to be changed when xpdf changes and the #define is for PDFdoc.h, adding a #define to pdflib.h seems a more logical place, but just copying the flags make differences visible in the build log. It would be helpful for posterity to add comments to pdlib.h where #defines are needed in order to use the xpdf header files. -- George N. White III Head of St. Margarets Bay, Nova Scotia