[macOS] make not working due to c++23

[dimitre]

in macOS 14.6.1, XCode 15.4 installed we should change config.macos.default.mk, config.osx.default.mk to

MAC_OS_CPP_VER = -std=c++20

instead of

MAC_OS_CPP_VER = -std=c++23

[danoli3]

Xcode 14 supports some C++23, Xcode 15 supports most if not all c++23 Having the setting to 23 enables C++23 features available in that development environment.

https://developer.apple.com/documentation/xcode-release-notes/xcode-15-release-notes

Clang Support:

https://developer.apple.com/xcode/cpp/

[dimitre]

it is failing using make

[danoli3]

What clang version? Can you setup a test that fails, I tried a lot of macOS variants to verify before. Merge the fix until we figure it out though then

On Thu, 5 Sep 2024 at 1:40 PM, Dimitre @.***> wrote:

it is failing using make

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[dimitre]

do you use Clang installed via Brew? I think I'm using the original one

Apple clang version 15.0.0 (clang-1500.3.9.4)
Target: arm64-apple-darwin23.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

[dimitre]

investigating further I found make template usually works because it is ending with

export MAC_OS_CPP_VER = -std=c++17

I'll propose a PR commenting out, and decreasing standard from c++23 to c++20