Use old minimum iOS version flags on Xcode < 7.0. - The newer style, which are more specific and match the SDK names are not available on Xcode < 7.0. Change-Id: I2f07a0365183d2781157cdb05fd49b30ae001ac5
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Ceres development happens on Gerrit, including both repository hosting and code reviews. The GitHub Repository is a continuously updated mirror which is primarily meant for issue tracking. Please see our Contributing to Ceres Guide for more details.
The upstream Gerrit repository is
https://ceres-solver.googlesource.com/ceres-solver