In CMake >= 3.0 it is more idiomatic to set per-target compiler options than global compiler settings. I have kept these options and defines as `PRIVATE` so they won't be exported with the target.
Closes#12916
COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/12916 from coryan:cleanup-cmake-avoid-global-compile-settings 3d586dc0e8
PiperOrigin-RevId: 536517165
This updates kMapWithProto2EnumValue -> kLegacyEnumIsClosedBit s.t. this bit now indicates closedness for enum fields as well, not just maps with enum values.
PiperOrigin-RevId: 535782238
This is a macro on some (older) versions of GCC, and macOS, and Windows. Sigh. I moved the `#undef` block to a common section. I also took the opportunity to add a regression test for all these macros that need to be `#undef`'d.
Part of the work for googleapis/google-cloud-cpp#8125
Closes#12903
PiperOrigin-RevId: 535649278
This will require C++14 (or higher) for the `libproto*` targets **and** anything that links them. If multiple dependencies have different C++ requirements, CMake will use the maximum version. It does not work with pkg-config, and does not work if the downstream dependency forcibly downgrades the compiler to C++11 (or lower). But prevents many problems. Note that if Abseil was compiled with C++17 it will require C++17 and that will propagate through Protobuf.
Closes#12901
COPYBARA_INTEGRATE_REVIEW=https://github.com/protocolbuffers/protobuf/pull/12901 from coryan:feat-cmake-use-target-compile-features 95084ac691
PiperOrigin-RevId: 535579816
Prior to this CL, asserts have no effect for Ruby 3+, because Ruby unconditionally defines `NDEBUG`: https://bugs.ruby-lang.org/issues/18777
We work around this by doing `#undef NDEBUG` right after including Ruby, if `NDEBUG` was not previously defined.
PiperOrigin-RevId: 535359088
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