* Fix unused variable warnings
These are now exposed because libprotobuf is no longer polluting the
compiler command-line with -Wno-unused-parameter.
* Convert (void)var to __unused where possible
* Fix previously unknown warnings
These become visible once flags are handled uniformly across all
Firestore targets in an upcoming build change.
* Stop using built-in CMake Framework support
CMake has built-in support for building Framework bundles (briefly:
bundles of libraries, associated headers, and resources) but this
doesn't work well for our needs.
1. In CMake 3.5.1 (our earliest supported CMake version) it doesn't copy
headers properly at build time.
2. Even up to CMake 3.15.5, CMake doesn't handle link-line multiplicity
correctly. CMake passes the static library location within the framework
and this seems to cause the linker to mishandle Objective-C metaclass
information resulting in duplicate symbols. Building with `-framework`
flags works correctly.
Previously we partially worked around the latter problem by building
some frameworks as shared instead of static frameworks, but this is
problematic because this mode of operation isn't actually intended and
is unsupported as far as the rest of Firebase is concerned. This turned
out to be fragile though and while refactoring libraries this workaround
broke.
Rather than piling on additional workarounds, this change converts the
frameworks to simple library targets and emulates framework imports
through include paths.
Additionally, this starts refactoring our cmake helper functions to make
them more like built-in functions. This makes it possible to freely use
different CMake features that were made difficult by trying to wrap
everything up in a single CMake command.
* style.sh generated changes
* Review feedback
* More review feedback
* add a new property `timestampsInSnapshotsEnabled` to `FirestoreSettings`, `false` by default;
* add a verbose warning message urging users to opt into the new behavior;
* set `timestampsInSnapshotsEnabled` to true in the integration tests to reduce the verbose console
spam during the test run and make sure the flag won't break anything once it's flipped.
- FSTTimestamp is now FIRTimestamp, under Firestore/Source/{Public,API}. This is a temporary solution; eventually, FIRTimestamp is supposed to live somewhere under Firebase;
- move most internal Timestamp methods to the public header (the only exception is ISOString).
Gil