Also, define isfinite, isinf, isnan, signbit in the gnulib
namespace instead of in the global namespace.
* build-aux/snippet/c++defs.h (_GL_BEGIN_NAMESPACE)
(_GL_END_NAMESPACE): New.
* lib/math.in.h (_GL_MATH_CXX_REAL_FLOATING_DECL_2): Use them.
(isfinite, isinf, isnan, signbit) [__cplusplus &&
GNULIB_NAMESPACE]: Define them in the GNULIB_NAMESPACE namespace
instead of in the global namespace.
* tests/test-math-c++.cc: Check that the isfinite, isinf, isnan,
signbit overloads exist in the GNULIB_NAMESPACE namespace, instead
of in the global namespace.
* build-aux/snippet/c++defs.h [__cplusplus && GNULIB_NAMESPACE]
(_GL_CXXALIAS_RPL_1, _GL_CXXALIAS_RPL_CAST_1, _GL_CXXALIAS_SYS)
(_GL_CXXALIAS_SYS_CAST, _GL_CXXALIAS_SYS_CAST2): Define a wrapper
struct instead of a function pointer.
* build-aux/gendocs.sh (version):
* doc/gendocs_template:
* doc/gendocs_template_min:
* doc/gnulib.texi:
* lib/version-etc.c (COPYRIGHT_YEAR):
Update copyright dates by hand in templates and the like.
* all files: Run 'make update-copyright'.
