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A few facts: - building the C library requires a proper core compiler - core compiler is issued from one of the core passes - the C library is required to build libstdc++ - newlib is only built for baremetal - in bare metal, the final compiler is issued from one of the core passes So we need to build the C library between core pass 1 and core pass 2. The only place is eithe libc_headers() or libc_start_files(). The most pertinent seems to be libc_start_files(). So we build newlib from libc_start_files(), and leave libc() empty.
This is the README for crosstool-NG TABLE OF CONTENT / ________________/ - GETTING STARTED - CREDITS - KNOWN ISSUES GETTING STARTED / _______________/ To get you started, just enter: ./configure --help You can find a (terse and WIP) documentation in docs/overview.txt. Here's a summary of what you'll find in there: Introduction History Installing crosstool-NG Configuring crosstool-NG Running crosstool-NG Using the toolchain Toolchain types Contributing Internals You can also point your browser at: http://ymorin.is-a-geek.org/projects/crosstool CREDITS / _______/ The people that helped are listed in docs/CREDITS. Many thanks to them! :-) KNOWN ISSUES / ____________/ The list of known issues is listed in docs/known-issues.txt. Aloha!