folly | An open-source C++ library developed and used at Facebook

I'm trying to write a PCLMULQDQ-optimized CRC-32 implementation. The specific CRC-32 variant is for one that I don't own, but am trying to support in library form. In crcany model form, it has the following parameters:

width=32 poly=0xaf init=0xffffffff refin=false refout=false xorout=0x00000000 check=0xa5fd3138 (Omitted residue which I believe is 0x00000000 but honestly don't know what it is)

A basic non-table-based/bitwise implementation of the algorithm (as generated by crcany) is:

On an M1 Mac, with npm 8.3.1 & node 17.4, when I run npx react-native run-ios I receive 2 errors:

Using Firebase Analytics in an ios app, on a phone and simulator using ios 15.4, XCode 13.2.1 (13C100) in a React Native app. The app itself works, but when I try to add unit tests, the test runner fails with the unrecognized selector problem. I have combed the issues on SO, they either ask for more info and die on the vine, or reference the same four issues on Firebase's github.

The Podfile (below) doesn't have use_frameworks! so it's unlikely that duplicate symbols are the culprit. I tried the one concrete piece of advice from the github issues, pod deintegrate and recreate Podfile.lock, to no avail.

Here is the crash log, and below is the Podfile:

If you build a library with conan and set compiler.cppstd setting to e.g. 20 and call conan install, the libraries are still built with the default standard for the given compiler.

The docs say:

The value of compiler.cppstd provided by the consumer is used by the build helpers:

• The CMake build helper will set the CONAN_CMAKE_CXX_STANDARD and CONAN_CMAKE_CXX_EXTENSIONS definitions that will be converted to the corresponding CMake variables to activate the standard automatically with the conan_basic_setup() macro.

So it looks like you need to call conan_basic_setup() to activate this setting. But how do I call it? By patching a library's CMakeLists.txt? I sure don't want to do that just to have the proper standard version used. I can see some recipes that manually set the CMake definition based on the setting, e.g.:

• https://github.com/conan-io/conan-center-index/blob/master/recipes/folly/all/conanfile.py#L117
• https://github.com/conan-io/conan-center-index/blob/master/recipes/crc32c/all/conanfile.py#L58
• https://github.com/conan-io/conan-center-index/blob/master/recipes/azure-storage-cpp/all/conanfile.py#L71
• https://github.com/conan-io/conan-center-index/blob/master/recipes/caf/all/conanfile.py#L105

But this feels like a hack either. So what is the proper way to make sure libraries are built with the compiler.cppstd I specified?

As mentioned in my question title, I'm trying to run pod install following an update to React Native 0.66, and I keep getting the following error:

I'm not experienced so I can't really pinpoint what is the problem. Thanks for the help.

I cloned this repo: https://github.com/flatlogic/react-native-starter.git

And was trying to follow the steps below:

git clone https://github.com/flatlogic/react-native-starter.git

cd react-native-starter && yarn install

cd ios && pod install

When I got to the pod install I'm getting that error.

For FBString, max_size() simply returns std::numeric_limits::max(). However, the higher two bits of capacity_ in struct MediumLarge is used to denotes the type of FBString(small/medium/large), which means the max of capacity_ will be 2^62-1(64-bit processor), it's less than the max value of size_t. Do I misunderstand the implementation or is this actually a bug?

I want to enable Hermes for my iOS react native project but I have next error:

When I try to build my react-native project in Xcode I get this error from RCT-Folly:

{path}/App/ios/Pods/RCT-Folly/folly/container/detail/F14Table.cpp:41:10: Thread-local storage is not supported for the current target

{path}/App/ios/Pods/RCT-Folly/folly/container/detail/F14Table.cpp:56:10: Thread-local storage is not supported for the current target

I'm not really sure what is going on so im not sure what information I need to provide but here is my Podfile: