root compilation fails after update to Xcode and Command Line Tools Version 9.0

[matthewkenzie]

Please note we will close your issue without comment if you delete, do not read or do not fill out the issue checklist below and provide ALL the requested information. If you repeatedly fail to use the issue template, we will block you from ever submitting issues to Homebrew again.

Please always follow these steps:

• Confirmed this is a problem with brew installing one, specific Homebrew/homebrew-core formula (not cask or tap) and not every time you run brew? If it's a general brew problem please file this issue at https://github.com/Homebrew/brew/issues/new. If it's a brew cask problem please file this issue at https://github.com/Homebrew/caskroom/homebrew-cask/new. If it's a tap (e.g. Homebrew/homebrew-php) problem please file this issue at the tap.
• Ran brew update and retried your prior step?
• Ran brew doctor, fixed all issues and retried your prior step?
• Ran brew gist-logs <formula> (where <formula> is the name of the formula that failed) and included the output link?
• If brew gist-logs didn't work: ran brew config and brew doctor and included their output with your issue?

To help us debug your issue please explain:

• What you were trying to do (and why)
• What happened (include command output)
• What you expected to happen
• Step-by-step reproduction instructions (by running brew install commands)

---

• Trying to install HEAD version of root (from homebrew-core) on MacOS 10.12.6 after (perhaps foolishly) updating Xcode and Command Line Tools to Version 9.0

• Build fails but not sure why

• I expected it to build ok

• I was running brew install -vd root --HEAD

• General brew commands work fine

• I ran brew update twice

• I ran brew doctor (no issue - i.e. got "Your system is ready to brew.")

• the output of brew gist-logs root can be found here: https://gist.github.com/matthewkenzie/62e1869316d36d1da235daa445c4875d

[soleti]

Applying these two patches

• root-project/root@e16c3fd
• root-project/root@2635084

should fix your problem. However, I get several errors like this (Complete gist available here: https://gist.github.com/soleti/fb9f29b969fdc047c9ef7e026ccae276)

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:313:9: error: no member named 'signbit' in the global namespace
using ::signbit;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:314:9: error: no member named 'fpclassify' in the global namespace
using ::fpclassify;
      ~~^```

[ilovezfs]

Please report this upstream.

[ilovezfs]

@soleti did you apply root-project/root@9339de9 yet

[soleti]

Yes, sorry, forgot to mention it. My issue seems related to some problems with <cmath>. Apparently it does not put ::signbit in the standard namespace

[ilovezfs]

Definitely report it upstream since they're probably thinking about cutting a release soon.

[ilovezfs]

Closing this out as it's an upstream issue.

[ilovezfs]

This is now fixed if you brew update and brew upgrade

[abhih1]

@soleti even I'm getting an error related to cmath. I tried brew update and brew upgrade, but to no avail.
I'm using Xcode 9.1 and root 6.09/01 on macos high sierra.
Any help please?!

[lozelin]

@abhih1 I am also having an error related to cmath.

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cmath:313:9: error: no member named 'signbit' in the global namespace
138 using ::signbit
And so on...

Was there any solution to this issue?

[abhih1]

@lozelin I fixed mine by reinstalling root to the latest version, to be compatible with the new Xcode update.
Good luck!