https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63695
--- Comment #2 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > Can you clarify the exact version of your bootstrap Ada compiler? > I suspect this is the issue here. Your bootstrap compiler is likely faulty > here (likely an old 4.10 snapshot?), and e.g. reverting to 4.9.x as your > bootstrap > compiler should address this issue. I have bootstrapped gcc5 from r216098 up to r216914 with Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/opt/gcc/gcc4.10a/libexec/gcc/x86_64-apple-darwin13.4.0/5.0.0/lto-wrapper Target: x86_64-apple-darwin13.4.0 <--- maverick Configured with: ../_clean/configure --prefix=/opt/gcc/gcc4.10a --enable-languages=c,c++,fortran,ada,lto --with-gmp=/opt/mp --with-system-zlib --enable-checking=release --with-isl=/opt/mp --enable-lto --enable-plugin Thread model: posix gcc version 5.0.0 20141010 (experimental) [trunk revision 216098] (GCC) I have successfully bootstrapped r216952 with Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/opt/gcc/gcc4.9wr/libexec/gcc/x86_64-apple-darwin14.0.0/4.9.2/lto-wrapper Target: x86_64-apple-darwin14.0.0 <--- yosemite Configured with: ../4.9_work/configure --prefix=/opt/gcc/gcc4.9wr --enable-languages=c,c++,fortran,objc,obj-c++,ada,java,lto --with-gmp=/opt/mp --with-system-zlib --with-isl=/opt/mp --enable-lto --enable-plugin Thread model: posix gcc version 4.9.2 20141019 (prerelease) [4.9 branch revision 216436p1] (GCC)