On 19 February 2014 12:18, Thomas Huth <th...@linux.vnet.ibm.com> wrote:
> I recently had a similar problem compiling QEMU on a freshly installed
> system, where I only had a normal C compiler, but no C++ installed yet.
>
> In rules.mak, you can find these lines:
>
> # If we have a CXX we might have some C++ objects, in which case we
> # must link with the C++ compiler, not the plain C compiler.
> LINKPROG = $(or $(CXX),$(CC))
>
> So that's ok, it sets LINKPROG to the c++ compiler if the variable is
> set, and to the C compiler if not.
>
> But now have a look at the configure script:
>
> if test -z "${CXX}${cross_prefix}"; then
> cxx="c++"
> else
> cxx="${CXX-${cross_prefix}g++}"
> fi
>
> [...]
>
> echo "CXX=$cxx" >> $config_host_mak
>
> That seems to always set the CXX variable! I think the above
> if-statement is wrong, it should set cxx only if the c++ program is
> really available.
Yes, you're right. Certainly my intention with the vixl changes
was to only build with C++ if a C++ compiler was present; I
must have misread this bit of configure. I'll put together a patch.
thanks
-- PMM
