K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2023-05-02T17:15:12.298491Z
K 7
svn:log
V 600
libpmc: Use LIB_CXX instead of explicit LDADD to link a C++ library.

This uses the C++ compiler as the linker instead of the C compiler
letting the compiler driver pick the right libraries.  This is a no-op
on main and stable/13 but matters for stable/12 where the current
logic breaks for external GCC since it tries to use a non-existent
libstdc++.

Reviewed by:	emaste
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D39197

(cherry picked from commit c6b3f47fedd3f94f74cc4f7c40761b1d0e777f17)

Git Hash:   076116b884744947ca33e6a8ff1007bf260614af
Git Author: jhb@FreeBSD.org
END