tree a24355949b1328fae2267fe680d5237f0cd0d46f
parent d38e49a6cc45e4bb908d46d5981c04fc2054d7b9
author Alex Stewart <alexs.mac@gmail.com> 1478975788 +0000
committer Alex Stewart <alexs.mac@gmail.com> 1479671086 +0000

Make gflags a public dependency of Ceres if it and glog are found.

- Previously we were not listing gflags as a public dependency of Ceres
  if it and glog were found (and MINIGLOG was not being used). This
  does not reflect that if glog was compiled with gflags then it will
  #include gflags/gflags.h in glog/logging.h, thus making gflags a
  public dependency of anything linking against glog.
- On *nix OSs if glog/gflags are shared libraries this did not result
  in a link error when compiling Ceres as the gflags symbols were
  indirectly resolved.  However, on MSVC this is not the case, and this
  could result in unresolved gflags symbol link errors when compiling
  Ceres.
- Now we add gflags to the list of public Ceres dependencies if both
  glog and gflags are found (and MINIGLOG is not enabled).

Change-Id: I5ce6038fa816781cc81b378522068dc563d29c51