Comment 4 for bug 2026834

I went over the upstream git repo and cherry-picked commits to fix this. There are many :/

$ grep ^commit debian/patches/doc-build-with-newer-cairo-*.patch
debian/patches/doc-build-with-newer-cairo-1.patch:commit c22ae5ed4ca8d7e5568be7d5a930ee388117703e
debian/patches/doc-build-with-newer-cairo-2.patch:commit 9df76e22464a0b6302b7c1cda980a35b39185bc4
debian/patches/doc-build-with-newer-cairo-3.patch:commit 293d3beaf03c8798899332b7a948b32c4a3da3e9
debian/patches/doc-build-with-newer-cairo-4.patch:commit 966d69c603b5a6ae22e3132b6ecc6a39b86e52ab
debian/patches/doc-build-with-newer-cairo-5.patch:commit 7b2a6027775b0158304635a98de0f9b5672f163a
debian/patches/doc-build-with-newer-cairo-6.patch:commit 8129939c312e4b5060042fdb93bd071b7b133381
debian/patches/doc-build-with-newer-cairo-7.patch:commit e002e293d9dc956a0634b3a4bcc8d93e655582d5

It's probably less risky to update to 1.9.7.

I'll post this info in the debian bug too, see what the maintainer prefers, before taking further action.

WIP branch: https://code.launchpad.net/~ahasenack/ubuntu/+source/doxygen/+git/doxygen/+ref/mantic-doxygen-cairo-compat

PPA: https://launchpad.net/~ahasenack/+archive/ubuntu/doxygen-et-al