On Sat, Sep 17, 2011 at 4:21 PM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On 17 September 2011 14:23, Jeffrey Walton wrote: >> /usr//include/cryptopp/cryptlib.h:99: error: template with C linkage > ... >> I've tried adding '-x c++' to force c++ in the files. > > That's obviously not going to help. > > If the compiler complains about a template, it's not compiling C, > because there's no such thing in C. Ditto for C linkage; everything > in C has C linkage, so there's no concept of any other kind of > language linkage, so no reason a C compiler would ever mention "C > linkage". So the compiler was already treating the files as > containing C++ (just apparently assuming that everything in a system > directory gets an implicit extern "C" around it.) OK, thanks. I'm not sure what the implications of "system compiler" are, but OpenBSD's configuration did not like those files in /usr/include. $ g++ -v Reading specs from /usr/bin/../lib/gcc-lib/i386-unknown-openbsd4.9/4.2.1/specs Target: i386-unknown-openbsd4.9 Configured with: OpenBSD/i386 system compiler Thread model: posix gcc version 4.2.1 20070719 $ Do you have any ideas why a location would make a difference? Jeff
