On Fri, 04 Apr 2014 19:45:44 -0700, Alexander Hansen
<[email protected]> wrote:
>
> The update shouldn't change this particular issue, though, since it's
> due to a change in the system include paths. When I tried a tweak to
> ensure that /usr/include/c++/4.2.1/ext/stdio_filebuf.h got brought
> in, the build failed:
>
> g++ -DHAVE_CONFIG_H -I. -I.. -I.. -DLOCALEDIR=\"/sw/share/locale\"
> -I/sw/include/glibmm-2.4 -I/sw/lib/glibmm-2.4/include
> -I/sw/include/sigc++-2.0 -I/sw/lib/sigc++-2.0/include
> -I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include
> -I/sw/include/pango-1.0 -I/sw/include -Wall -Wno-unused -Os -MT
> value.lo -MD -MP -MF .deps/value.Tpo -c value.cc -fno-common -DPIC
> -o .libs/value.o
> value.cc:135:12: error: use of undeclared identifier '__gnu_cxx'
> : buf (new __gnu_cxx::stdio_filebuf<char> (file, std::ios_base::out)),
stdio_filebuf is a GCC extension, so as clang's "gcc" moves away from
actually being gcc, it loses more and more of the gccisms. The
stdio:filebuf.h itself is a template class but its namespace
declaration appears appears to involve some hiding or subclassing. On
my 10.8 with not-updated xcode, gelemental builds. According to
libelementa/.deps/value.Plo, the header being accessed is
/usr/include/c++/4.2.1/ext/stdio_filebuf.h, which declares at line 41:
_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
Is that what you have? The activation code in
/usr/include/c++/4.2.1/bits/c++config.h What if you make a local copy
of that file with (with a different name and adjusted #include of it
from value.cc if you want to be sure) and change at lines ~41 and ~160
respectively:
-_GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
+namespace __gnu_cxx {
-_GLIBCXX_END_NAMESPACE
+}
Googling for this sort of compatiblity problem (I don't actually know
anything about this specific situation) suggests the portable solution
is to use boost. And gelemental itself seems like a dead upstream.
dan
--
Daniel Macks
[email protected]
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