[Bug 221638] [maintainer-update] cad/calculix: attempt to build on FreeBSD 10

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221638

            Bug ID: 221638
           Summary: [maintainer-update] cad/calculix: attempt to build on
                    FreeBSD 10
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: pfg at FreeBSD.org

Created attachment 185593
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=185593&action=edit
Use C++11 lib.

On FreeBSD 10.3, pkg-fallout is reporting errors like these:
...
In file included from /usr/include/c++/v1/locale:192:
/usr/include/c++/v1/cstdlib:159:53: error: expected unqualified-id
inline _LIBCPP_INLINE_VISIBILITY long      abs(     long __x) _NOEXCEPT {return
 labs(__x);}
                                                    ^
./extUtil.h:54:18: note: expanded from macro 'abs'
#define abs(x) ((x) >= 0 ? (x) : -(x))
                 ^
In file included from uselibSNL.cpp:33:
In file included from /usr/include/c++/v1/iostream:40:
In file included from /usr/include/c++/v1/istream:163:
In file included from /usr/include/c++/v1/ostream:140:
In file included from /usr/include/c++/v1/locale:192:
/usr/include/c++/v1/cstdlib:159:53: error: expected ')'
./extUtil.h:54:18: note: expanded from macro 'abs'
#define abs(x) ((x) >= 0 ? (x) : -(x))
...

I am guessing it's an issue with the C++ library so the attached patch may fix
it. If not we should just avoid building on FreeBSD 10.

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