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This patch to libbacktrace provides dummy versions of lstat and readlink if they are not available on the system. Bootstrapped and ran libbacktrace tests on x86_64-pc-linux-gnu both normally and with a hand-edited config.h. Committed to mainline. Ian 2017-09-22 Ian Lance Taylor <iant@golang.org> PR sanitizer/77631 * configure.ac: Check for lstat and readlink. * elf.c (lstat, readlink): Provide dummy versions if real versions are not available. * configure, config.h.in: Rebuild.
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