Why after gcc-c++, libstc++ and libstdc++-devel update, the src.rpms fail when are compiled? That's what i get: ... checking for dlfcn.h... yes checking for i686-redhat-linux-gnu-g++... no checking for i686-redhat-linux-gnu-c++... no checking for i686-redhat-linux-gnu-gpp... no checking for i686-redhat-linux-gnu-aCC... no checking for i686-redhat-linux-gnu-CC... no checking for i686-redhat-linux-gnu-cxx... no checking for i686-redhat-linux-gnu-cc++... no checking for i686-redhat-linux-gnu-cl... no checking for i686-redhat-linux-gnu-FCC... no checking for i686-redhat-linux-gnu-KCC... no checking for i686-redhat-linux-gnu-RCC... no checking for i686-redhat-linux-gnu-xlC_r... no checking for i686-redhat-linux-gnu-xlC... no checking for g++... g++ checking whether we are using the GNU C++ compiler... yes checking whether g++ accepts -g... yes checking dependency style of g++... gcc3 checking how to run the C++ preprocessor... /lib/cpp configure: error: C++ preprocessor "/lib/cpp" fails sanity check See `config.log' for more details. error: Bad exit status from /var/tmp/rpm-tmp.70505 (%build) -- Best regards, Strong.