Bug#1021458: o3dgc: reproducible-builds: build path embedded in libo3dgc_common_lib.a

[Vagrant Cascadian]

Source: o3dgc
Severity: normal
Tags: patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: buildpath
X-Debbugs-Cc: reproducible-bugs at lists.alioth.debian.org

The build path is embedded in
/usr/lib/x86_64-linux-gnu/libo3dgc_common_lib.a:

  https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/diffoscope-results/o3dgc.html

  /build/1st/o3dgc-0~20131011/src/o3dgc_common_lib/inc/o3dgcBinaryStream.h
  vs.
  /build/2/o3dgc-0~20131011/2nd/src/o3dgc_common_lib/inc/o3dgcBinaryStream.h

The attached patch to various CMakeLists.txt files fixes this by adding
-ffile-prefix-map to CMAKE_CXX_FLAGS.

Alternately, using the default CXXFLAGS from dpkg-buildflags would be
possible by removing debian/patches/fPIC.diff and possibly passing the
appropriate hardening build flags options.

According to my local tests, with this patch applied, o3dgc should build
reproducibly on tests.reproducible-builds.org!

Thanks for maintaining o3dgc!

live well,
  vagrant
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 0001-src-o3dgc-CMakeLists.txt-Add-ffile-prefix-map-to-CMA.patch
Type: text/x-diff
Size: 2412 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/reproducible-bugs/attachments/20221008/a814ef1b/attachment-0001.patch>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 227 bytes
Desc: not available
URL: <http://alioth-lists.debian.net/pipermail/reproducible-bugs/attachments/20221008/a814ef1b/attachment-0001.sig>