Xcode 9 / clang - unknown warning group

[Deadpikle]

Description

When building some code that includes doctest, the following warning is emitted on line 65 of the combined header:

Unknown warning group - '-Wzero-as-null-pointer-constant', ignored

Steps to reproduce

To reproduce, simply attempt to build the some code that uses doctest.

Suggested Fix (adjusted from similar error here)

#if !defined(__has_warning) || __has_warning("-Wzero-as-null-pointer-constant")
# pragma GCC diagnostic ignored "-Wzero-as-null-pointer-constant"
#endif

Extra information

• doctest version: v1.2.1
• Operating System: macOS Sierra
• Compiler+version: Xcode 9 / Clang 9 (I think it's clang 9?)

re: clang version:

$ clang -v
Apple LLVM version 9.0.0 (clang-900.0.37)
Target: x86_64-apple-darwin16.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

[onqtam]

Should be fixed - this build with xcode 9 passed :)