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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Adhemerval Zanella via Libc-alpha Reply-To: Adhemerval Zanella Cc: Alistair Francis , Adhemerval Zanella via Libc-alpha Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" On 22/10/2020 13:40, Adhemerval Zanella wrote: > > > On 22/10/2020 12:37, Florian Weimer wrote: >> * Adhemerval Zanella: >> >>> Thanks for bring this up, and I agree with you that this breakage might >>> incur in more headaches than solutions. I will send a fix to export >>> the xstat symbols in static objects as well, while preserving the compat >>> symbols on shared objects. >> >> Sorry, I do not see how the compat symbols work for the Ocaml use case? >> The compat symbol is what creates the Ocaml link failure. It has to be >> a non-compat symbol. We have to rely on lack of use in the installed >> headers (which does not seem to be a real problem in this particular >> case). > > So the issue is Ocaml is providing static libraries that are meant to > generate dynamic linked binaries? Does it provide the same facility to > build static binaries and if it were the case, how this is done? > > In the end, do still need to keep providing the xstat symbols in the > static library as well or just remove the compat symbol directive would > be suffice? > >> >> By the way, I verified that glibc 2.0 binaries without symbol versioning >> can bind to the __xstat compat symbol. Apparently binaries can do that >> as long as they do not contain any version information at all: >> >> 165100: binding file /home/fweimer/src/my/glibc-test-binaries/gcc-2.7.2.3/i386/root/usr/bin/gcc [0] to ./libc.so.6 [0]: normal symbol `__xstat' Ok, I understood better the scenario Ocaml might be doing and this is another fallback of using the libc_noshared wrapper. I will send patch to revert and fix the fix the build for newer ABIS.