Bootstrap of GCC trunk (revision 112028) failed on ia64, x86_64 and i686 when configured with --host=... option.
$ ../src/configure --prefix=/opt/gcc-42 --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --host=x86_64-redhat-linux $ make bootstrap >LOG Makefile:13360: warning: overriding commands for target `restrap' Makefile:12652: warning: ignoring old commands for target `restrap' configure: WARNING: If you wanted to set the --build type, don't use --host. If a cross compiler is detected then cross compile mode will be used. ... make[1]: x86_64-redhat-linux-ar: Command not found -- Summary: Bootstrap of GCC trunk failed when configured with -- host=... Product: gcc Version: 4.2.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: grigory_zagorodnev at linux dot intel dot com GCC host triplet: x86_64-redhat-linux http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26673