On 14 December 2016 at 11:25, Silvano Seva wrote: > Good morning, > > I'm a developer of the miosix kernel (www.miosix.org), which currently uses > a patched version of GCC 4.7.3 to build the kernel and user's sources. For > testing purpuoses I'm trying to update the compiler to GCC 6.2.0 reapplying > the patches made for the older GCC and modifying them when necessary. > I was able to apply all the patches but I get errors at compile time that > are related to the fact that the thread model for libstdc++-v3 is > unspecified. I noticed that because the gthr-default.h file is correct in > the directories related to libgcc but is empty into those related to > libstdc++-v3. Look at the rule in libstdc++-v3/include/Makefile.am which uses sed to create the libstdc++ copy of gthr-default.h > How do I specify the thread model for libstdc++-v3? You don't specify it. It needs to use the same thread model as libgcc.
