From 2d6d995709482cc8b6a76dbb5334a28001a14a9a Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Thu, 11 Apr 2024 14:08:19 +0200 Subject: [PATCH] meson.build: Disable -fzero-call-used-regs on OpenBSD MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit QEMU currently does not work on OpenBSD since the -fzero-call-used-regs option that we added to meson.build recently does not work with the "retguard" extension from OpenBSD's Clang. Thus let's disable the -fzero-call-used-regs here until there's a better solution available. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2278 Signed-off-by: Thomas Huth Reviewed-by: Philippe Mathieu-Daudé Message-ID: <20240411120819.56417-1-thuth@redhat.com> Signed-off-by: Paolo Bonzini --- meson.build | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/meson.build b/meson.build index c9c3217ba4..91a0aa64c6 100644 --- a/meson.build +++ b/meson.build @@ -562,7 +562,11 @@ hardening_flags = [ # # NB: Clang 17 is broken and SEGVs # https://github.com/llvm/llvm-project/issues/75168 -if cc.compiles('extern struct { void (*cb)(void); } s; void f(void) { s.cb(); }', +# +# NB2: This clashes with the "retguard" extension of OpenBSD's Clang +# https://gitlab.com/qemu-project/qemu/-/issues/2278 +if host_os != 'openbsd' and \ + cc.compiles('extern struct { void (*cb)(void); } s; void f(void) { s.cb(); }', name: '-fzero-call-used-regs=used-gpr', args: ['-O2', '-fzero-call-used-regs=used-gpr']) hardening_flags += '-fzero-call-used-regs=used-gpr'