Boost C++ Libraries: Ticket #346: Error: Template with C linkage

Jonathan Turkanis — Tue, 25 Jan 2005 23:29:01 GMT

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There's no file named boost\graph\xxxx.hpp.
Seriously, you need to say what file caused the error, and
provide at least some of the error messages.
Also, you should use forward slashes.
Jonathan Turkanis

pulco-citron — Tue, 12 Apr 2005 09:13:22 GMT

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I'm having the same kind of errors, I think.
I'm using a powerpc with darwin 7.8.0, compiling with gcc
3.3 (apple build) and gcc 3.4.3.
Not a single boost source file compiles, in fact: every time
a boost .hpp refers to some STL header, tons of "error:
template with C linkage" come up. g++ mistakenly assumes
that such included files have C linkage.
IMHO, that can be corrected with the adequate compiler flag
(which one ?)

stevehartwell — Wed, 13 Apr 2005 05:26:31 GMT

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I have determined one way this problem can occur, and it's unrelated to
boost.  (I've googled and searched the boost archives but I haven't found a
resolution for this problem yet).
It seems that with gcc 3.3 (the MacOS X version I'm using), if any headers
are found in the paths found by -isystem parameters, those header files
will be compiled with C linkage, regardless of the source language being
compiled (e.g. g++ or /usr/bin/gcc-3.3 -x c++ ...)
Here's a transcript of a terminal session showing the problem:
$ mkdir /tmp/sys
$ ed
a
template <class T> inline void foo(T& t) { }
.
w /tmp/sys/foo.hpp
45
q
$ ed
a
/* */
#include "foo.hpp"
int main(int argc, char **argv) { return 0; }
.
w foo.cpp
72
q
$ cc -isystem /tmp/sys foo.cpp
In file included from foo.cpp:2:
/tmp/sys/foo.hpp:1: error: template with C linkage
~
$ g++ -isystem /tmp/sys foo.cpp
In file included from foo.cpp:2:
/tmp/sys/foo.hpp:1: error: template with C linkage
$

status changed

david_abrahams — Thu, 11 Jan 2007 00:39:48 GMT

status assigned → closed

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Closing because the Graph developers use MacOSX and presumably it works for them.  Feel free to reopen if this is inappropriate.

status changed; resolution deleted

anonymous — Fri, 28 Sep 2007 03:44:53 GMT

status closed → reopened
resolution Works For Me

same problems.

gcc-4.0 i686-apple-darwin8-g++-4.0.1

error: g++ -g -Wall -Wno-unused -I. -I/usr/include/libxml2 -I/usr/local/include -c main.cc -o main.o /usr/include/c++/4.0.0/bits/stl_relops.h:118: error: template with C linkage /usr/include/c++/4.0.0/bits/stl_relops.h:131: error: template with C linkage /usr/include/boost/checked_delete.hpp:29: error: template with C linkage

I installed boost to prefix /usr, had to make a symbolic link ln -s boost-1_34_1 boost

description changed; cc, severity set

Douglas Gregor — Fri, 28 Sep 2007 11:30:43 GMT

cc valeika@… added
description modified (diff)
severity → Problem

Which version Mac OS X are you using?

Does a simple program including just <vector> compile?

Steve Hartwell seems to have found the same problem on Mac OS X, and in his case it was unrelated to Boost.

status changed; resolution set

Douglas Gregor — Mon, 07 Jan 2008 03:55:24 GMT

status reopened → closed
resolution → worksforme

Without knowing if this problem is specific to the BGL or is a general C++ installation problem, there isn't anything we can do. Closing this ticket.