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Date:      Fri, 25 Aug 2023 06:59:12 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 273338] '#include <cmath>' fails on 14 because of a likely bug with error: expected unqualified-id
Message-ID:  <bug-273338-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D273338

            Bug ID: 273338
           Summary: '#include <cmath>' fails on 14 because of a likely bug
                    with error: expected unqualified-id
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: bugs@FreeBSD.org
          Reporter: yuri@freebsd.org

The port math/mpsolve fails to compile on 14 amd64:

libtool: compile:  cc -DHAVE_CONFIG_H -I. -I../.. -I../../include
-I../../include -D_REENTRANT -Wall -DMPS_USE_BUILTIN_COMPLEX -DNICE_DEBUG
-fno-math-errno -fomit-frame-pointer -D_MPS_PRIVATE -D_THREAD_SAFE -pthread
-isystem /usr/local/include -O2 -pipe -fstack-protector-strong -isystem
/usr/local/include -fno-strict-aliasing -MT common/parser.lo -MD -MP -MF
common/.deps/parser.Tpo -c common/parser.c  -fPIC -DPIC -o
common/.libs/parser.o
In file included from common/nroots-polynomial.cpp:11:
In file included from ../../include/mps/mps.h:99:
In file included from ../../include/mps/private/system/memory-file-stream.h=
:50:
In file included from /usr/include/c++/v1/iostream:43:
In file included from /usr/include/c++/v1/ios:221:
In file included from /usr/include/c++/v1/__locale:18:
In file included from /usr/include/c++/v1/mutex:191:
In file included from /usr/include/c++/v1/__memory/shared_ptr.h:42:
In file included from /usr/include/c++/v1/atomic:2669:
/usr/include/c++/v1/cmath:587:17: error: expected unqualified-id
    return std::isnan(__lcpp_x);
                ^
../../include/mps/types.h:27:3: note: expanded from macro 'isnan'
  (sizeof(x) =3D=3D sizeof(long double) ? isnan_ld (x) \
  ^

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