STINNER Victor <vstin...@redhat.com> added the comment: > ... Now, I'm confused. Is PR 12876 useless? Was distutils already fixed?
My test was wrong, objdump sometimes uses "RUNPATH", sometimes "RPATH": $ objdump -a -x build/lib.linux-x86_64-*/lxml/etree.cpython-*-x86_64-linux-gnu.so|grep -i -E 'rpath|RUNPATH' RUNPATH /opt/py38/lib Wait, they are not the same. Now I'm confused :-) More doc about RPATH and RUNPATH: https://blog.qt.io/blog/2011/10/28/rpath-and-runpath/ "An additional source of confusion is that, depending on your distribution, the -rpath argument in ‘ld’ behaves differently. For some it generates a DT_RPATH and for others DT_RPATH and DT_RUNPATH." """ Unless loading object has RUNPATH: RPATH of the loading object, then the RPATH of its loader (unless it has a RUNPATH), ..., until the end of the chain, which is either the executable or an object loaded by dlopen Unless executable has RUNPATH: RPATH of the executable LD_LIBRARY_PATH RUNPATH of the loading object ld.so.cache default dirs """ I'm now also confused by UnixCCompiler.runtime_library_dir_option() of distutils.unixccompiler which starts with a long comment: # XXX Hackish, at the very least. See Python bug #445902: # http://sourceforge.net/tracker/index.php # ?func=detail&aid=445902&group_id=5470&atid=105470 # Linkers on different platforms need different options to # specify that directories need to be added to the list of # directories searched for dependencies when a dynamic library # is sought. GCC on GNU systems (Linux, FreeBSD, ...) has to # be told to pass the -R option through to the linker, whereas # other compilers and gcc on other systems just know this. # Other compilers may need something slightly different. At # this time, there's no way to determine this information from # the configuration data stored in the Python installation, so # we use this hack. Linux code path: if self._is_gcc(compiler): # gcc on non-GNU systems does not need -Wl, but can # use it anyway. Since distutils has always passed in # -Wl whenever gcc was used in the past it is probably # safest to keep doing so. if sysconfig.get_config_var("GNULD") == "yes": # GNU ld needs an extra option to get a RUNPATH # instead of just an RPATH. return "-Wl,--enable-new-dtags,-R" + dir else: return "-Wl,-R" + dir else: # No idea how --enable-new-dtags would be passed on to # ld if this system was using GNU ld. Don't know if a # system like this even exists. return "-R" + dir When GCC is detected on Linux and GNULD sysconfig variable is equal to "yes", distutils uses "-Wl,--enable-new-dtags,-R <path>" rather than "-Wl,-R <path>" or just "-R <path>". See also https://wiki.debian.org/RpathIssue ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue36659> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
