Hi,
Did you upgrade your gcc between compiling ntl and compiling giac? It seems
to me like ntl was compiled with gcc 4.x while you are trying to compile
giac with gcc 5.x.
Isuru Fernando
On Wed, Mar 8, 2017 at 8:37 PM, Darij Grinberg <darijgrinb...@gmail.com>
wrote:
> Hi,
>
> I'm failing to build ("make build") 7.6.beta6 on my university computer:
>
> [giac-1.2.2.103] /home/dgrinber/sage-7.5.1/local/lib/libntl.so: undefined
> reference to `vtable for std::__cxx11::basic_stringbuf<char,
> std::char_traits<char>, std::allocator<char> >@GLIBCXX_3.4.21'
> [giac-1.2.2.103] collect2: error: ld returned 1 exit status
>
> For the complete log, see https://dl.dropboxusercontent.
> com/u/83265276/giac-1.2.2.103.log
>
> It's been a while since I've last run into troubles building Sage, which
> is a good thing but unfortunately means I have long forgotten how to deal
> with such issues. Any ideas?
>
> Best regards,
> Darij
>
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