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Date:      Sun, 04 Aug 2019 18:00:48 +0000
From:      bugzilla-noreply@freebsd.org
To:        ports-bugs@FreeBSD.org
Subject:   [Bug 239648] lang/gcc9: defines _GNU_SOURCE by default
Message-ID:  <bug-239648-7788@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D239648

            Bug ID: 239648
           Summary: lang/gcc9: defines _GNU_SOURCE by default
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: gerald@FreeBSD.org
          Reporter: pkubaj@FreeBSD.org
             Flags: maintainer-feedback?(gerald@FreeBSD.org)
          Assignee: gerald@FreeBSD.org

G++9 (only C++) defines _GNU_SOURCE by default. This breaks some ports (e.g.
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D239627 ) on GCC
architectures. After further investigation, I pinpointed it to
/usr/local/lib/gcc9/gcc/powerpc64-portbld-freebsd12.0/9.1.0/plugin/include/=
config/gnu-user.h,
which has this line:
#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"

GCC8 didn't set it, this problem only appeared in 9.

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