cmd/go, cmd/link: make builds deterministic
Add the following flags when supported by the compiler: -gno-record-gcc-switches -fdebug-prefix-map=$WORK=/tmp/go-build Add an empty NAME symbol to the ELF .symtab. GNU ld will add a NAME symbol when one is not present; including one of our own prevents it from adding a reference to the link tempdir. Fixes #13247 for compilers that support -fdebug-prefix-map. (gcc, clang in the near future.) Change-Id: I221c71fc59cd23ee8c99bcc038793ff4623c9ffc Reviewed-on: https://go-review.googlesource.com/19363Reviewed-by:Ian Lance Taylor <iant@golang.org> Run-TryBot: Damien Neil <dneil@google.com>
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