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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/109634] Linking Imagick for PHP compiles fine but gives
 segfault caused by libgomp on runtime
Date: Thu, 27 Apr 2023 06:45:46 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: libgomp
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X-Bugzilla-Keywords: openmp
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X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: WONTFIX
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109634

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
As mentioned by Andrew, this is a user error.
libgomp can be only dlopened in threaded apps if there is still space in the
static TLS surplus, which unfortunately some versions of glibc use even for
normal TLS rather than just static TLS.
So, LD_PRELOAD=3Dlibgomp.so.1, or link the program with libgomp.so.1 rather=
 than
just its libraries, or dlopen it before spawning threads.
This is how glibc behaves, and unless we want to slow down libgomp extremel=
y,
there is nothing that can be done about it on the GCC side.=