Fix code generation error in gcc6809 It turned out that under some circumstances, the gcc optimizer would select an instruction sequence that had the sense of a branch inverted. It seems this was due to a particular instruction pattern included in the machine description not being quite right with respect to how the condition codes were tracked. Removing that instruction pattern seems to fix things (subtraction with the arguments reversed). gcc seems to be smart enough to figure out how to reorganize code to work without this reversed sense subtraction and then do the right thing.

If there are no html files in the "manual" directory and there is no
"manual.html" file, it means that you have either checked out the source
repository on a non-release branch or the packager messed up.

In either case, if you have "docbook2html" installed, you should be able
to build the manual with one of the following:

docbook2html -o manual manual.docbook.sgml

or

docbook2html -u manual.docbook.sgml && mv manual.docbook.html manual/manual.html

PDF can be generated by doing:

docbook2pdf -u manual.docbook.sgml && mv manual.docbook.pdf manual/manual.pdf