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On Haiku, this is now available as part of libbsd. The build system for libbacktrace does not know about this library. In a regular build this does not matter, as the test in the configure script will fail to compile. However, when libbacktrace is built as a target library, only the existence of the method in link.h is tested, which will succeed. This lead to libgfortan.so having undefined references. See: https://github.com/haikuports/haikuports/issues/9241 Change-Id: I576d7802d43e11787b3bc1d09c89a42bf982dc3b Reviewed-on: https://review.haiku-os.org/c/buildtools/+/6950 Reviewed-by: waddlesplash <waddlesplash@gmail.com>
The libbacktrace library Initially written by Ian Lance Taylor <iant@golang.org> The libbacktrace library may be linked into a program or library and used to produce symbolic backtraces. Sample uses would be to print a detailed backtrace when an error occurs or to gather detailed profiling information. In general the functions provided by this library are async-signal-safe, meaning that they may be safely called from a signal handler. The libbacktrace library is provided under a BSD license. See the source files for the exact license text. The public functions are declared and documented in the header file backtrace.h, which should be #include'd by a user of the library. Building libbacktrace will generate a file backtrace-supported.h, which a user of the library may use to determine whether backtraces will work. See the source file backtrace-supported.h.in for the macros that it defines. As of October 2020, libbacktrace supports ELF, PE/COFF, Mach-O, and XCOFF executables with DWARF debugging information. In other words, it supports GNU/Linux, *BSD, macOS, Windows, and AIX. The library is written to make it straightforward to add support for other object file and debugging formats. The library relies on the C++ unwind API defined at https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html This API is provided by GCC and clang.