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From: | Paul Eggert |
Subject: | bug#37852: Build failure on MSYS2 (undefined reference to _chk functions) |
Date: | Tue, 22 Oct 2019 11:27:48 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 |
On 10/21/19 7:37 PM, Eli Zaretskii wrote:
I don't understand MSYS2 well enough to suggest fixes for Emacs, other than "don't configure with --enable-gcc-warnings and don't compile with _FORTIFY_SOURCE defined".Should we perhaps test for -lssp, and if it is found, add it to the link command when we define _FORTIFY_SOURCE?
If this is done only on MSYS2 platforms, and if -lssp is used only when it causes otherwise-failing programs to work, then it should be OK. I wouldn't do it elsewhere because on Fedora at any rate, -lssp used to be trouble and was best avoided.
It vaguely sounds like MSYS2 is trailing Fedora and so is experiencing problems Fedora had a few years ago (see, e.g., <https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4973>).
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