[MacPorts] #44224: root5: fails to compile with libc++ on 10.7 (error: no matching function for call to 'isnan')

[MacPorts]

#44224: root5: fails to compile with libc++ on 10.7 (error: no matching function
for call to 'isnan')
----------------------+----------------------
  Reporter:  mojca@…  |      Owner:  jonesc@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:  lion
      Port:  root5    |
----------------------+----------------------
Changes (by mojca@…):

 * cc: jeremyhu@… (added)


Comment:

 The problem is solved if I use `macports-clang-3.4`. But I still have no
 clue why the problem is there (with the default compiler) in the first
 place.

 Here's some related discussion (different software, different function):
 http://www.pcl-users.org/Trunk-pcl-with-c-11-OS-X-10-8-td4025981.html

 I would like to be able to create a minimal working example showing the
 problem with the compiler (to decide whether it's a compiler problem or
 something that could be easily fixed in ROOT sources), but I didn't manage
 to reproduce the problem outside of ROOT despite trying.

 I would be grateful for some insight.

-- 
Ticket URL: <https://trac.macports.org/ticket/44224#comment:1>
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