On Tue, May 05, 2015 at 04:42:02AM +0000, Aditya K wrote: > I was able to successfully bootstrap gcc by using clang as the stage 1 > compiler. I configured gcc using the following arguments. > > ../configure --disable-multilib --enable-bootstrap --enable-languages=c,c++ > CC=/work/llvm/install-release/bin/clang > CXX=/work/llvm/install-release/bin/clang++ > > And the bootstrap was successful. One useful thing I got to see was clang > warnings. Clang produced several warnings (> 1000 unique ones). I have > attached two files with this email. > 1. sorted list of warnings (summary only) > 2. complete build log. > > I want to know that is there any interest in resolving these warnings? I went > through the list a little bit and some warnings > appear to be quite useful. e.g. > > 1. warning: struct 'varpool_node' was previously declared as a class > [-Wmismatched-tags] > > 2. ../../gcc/cgraph.h../../gcc/wide-int.h::18881125::101:: warningwarning: : > class 'cgraph_node' was previously declared as a struct [-Wmismatch > ed-tags]'fixed_wide_int_storage' defined as a class template here but > previously declared as a struct template [-Wmismatched-tags]
as discussed those particular warnings are pretty useless. However some of the other warnings such as the NULL to bool conversion and unused function ones seem like they might be worth looking into. If you determin warnings make sense to fix it'd be nice to change gcc to warn too. I'm not sure why, but the list of warnings is really garbled which makes it hard to read. Trev > > Thanks, > -Aditya
