I just tried to reconfigure a build so as to change program suffix and install directory. The build fails but the message reports actions to take , however these actions do not solve the problem. Only rebuilding in completely fresh empty directory seems to work. 545 make bootstrap 546 make clean 547 make distclean 548 rm -f ./config.cache 549 ls 550 ../gcc-4.3.trunk/configure --prefix=/usr/local/encap/gccdev-4.4.0.1 --program-suffix=v44 --enable-languages=c,c++,fortran 551 make bootstrap It told me to : run `make distclean' and/or `rm ./config.cache' and start over So, this instruction seems insufficient to enable the rebuild. Startign over completely from scratch probably works (i'll find out in a couple of hours) ... configure: loading cache ./config.cache configure: error: `CC' has changed since the previous run: configure: former value: /sources/gcc/build-4.3.trunk/./gcc/xgcc -B/sources/gcc/build-4.3.trunk/./gcc/ -B/usr/local/encap/gcc-4.3.0.1/x86_64-unknown-linux-gnu/bin/ -B/usr/local/encap/gcc-4.3.0.1/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/encap/gcc-4.3.0.1/x86_64-unknown-linux-gnu/include -isystem /usr/local/encap/gcc-4.3.0.1/x86_64-unknown-linux-gnu/sys-include configure: current value: /sources/gcc/build-4.3.trunk/./gcc/xgcc -B/sources/gcc/build-4.3.trunk/./gcc/ -B/usr/local/encap/gccdev-4.4.0.1/x86_64-unknown-linux-gnu/bin/ -B/usr/local/encap/gccdev-4.4.0.1/x86_64-unknown-linux-gnu/lib/ -isystem /usr/local/encap/gccdev-4.4.0.1/x86_64-unknown-linux-gnu/include -isystem /usr/local/encap/gccdev-4.4.0.1/x86_64-unknown-linux-gnu/sys-include configure: error: changes in the environment can compromise the build configure: error: run `make distclean' and/or `rm ./config.cache' and start over make[1]: *** [configure-fixincludes] Error 1 make[1]: Leaving directory `/sources/gcc/build-4.3.trunk'
