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libtiff has many globals. These fit into 3 or 4 categories. This bug should be set up to depend on other bugs for the individual issues. Here is a current dump of the globals in libtiff on Linux: $ nm libtiff.so.5.0.3 -S --size-sort | grep ' [dDbB] ' 000000000026f660 0000000000000001 b completed.6338 000000000026f850 0000000000000004 b Fltsize 000000000026f854 0000000000000004 b LogK1 000000000026f858 0000000000000004 b LogK2 000000000026f6a0 0000000000000004 b initialized.6408 000000000026f648 0000000000000008 D _TIFFerrorHandler 000000000026f688 0000000000000008 B _TIFFerrorHandlerExt 000000000026f680 0000000000000008 b _TIFFextender 000000000026f640 0000000000000008 D _TIFFwarningHandler 000000000026f860 0000000000000008 B _TIFFwarningHandlerExt 000000000026f668 0000000000000008 b dtor_idx.6340 000000000026f678 0000000000000008 b registeredCODECS 000000000026f670 0000000000000008 b whitepoint.5360 000000000026cfc0 000000000000000c d ycbcrcoeffs.5356 000000000026d1a0 0000000000000018 d exifFieldArray 000000000026d1c0 0000000000000018 d tiffFieldArray 000000000026c2c0 0000000000000030 d fax3Fields 000000000026c280 0000000000000030 d fax4Fields 000000000026c5e0 0000000000000030 d predictFields 000000000026c6e0 0000000000000030 d zipFields 000000000026c680 0000000000000048 d orientNames 000000000026c620 0000000000000048 d photoNames 000000000026c3c0 0000000000000060 d LogLuvFields 000000000026c580 0000000000000060 d pixarlogFields 000000000026c300 00000000000000c0 d jpegFields 000000000026c180 00000000000000f0 d faxFields 000000000026c420 0000000000000150 d ojpegFields 000000000026f6c0 0000000000000190 b oog_table.6407 000000000026cfe0 00000000000001b0 D _TIFFBuiltinCODECS 000000000026d1e0 0000000000000a80 d exifFields 000000000026dc60 00000000000019e0 d tiffFields The worst ones are the codecs, warning, error, and extender. To fix this without breaking compatibility with existing source, these need to be fixed in the manner specified here: http://www.asmail.be/msg0054681986.html Next come a few tables that should be generated at compile time (Fltsize, LogK1, LogK2, initialized, oog_table). There are a few static things that are returned by TIFFGetField, I think whitepoint and ycbcrcoeffs. These definitely need to be fixed. photoNames and orientNames could be changed from char* arrays to switch statements, this would save a few more relocations. The Fields things are ok, they are static const in the code, but due to shared library relocations cannot be const in the library.
Bugzilla is no longer used for tracking libtiff issues. Remaining open tickets, such as this one, have been migrated to the libtiff GitLab instance at https://gitlab.com/libtiff/libtiff/issues . The migrated tickets have their summary prefixed with [BZ#XXXX] where XXXX is the initial Bugzilla issue number.
