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build system fixes

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Merge tag 'for-upstream' of https://gitlab.com/bonzini/qemu into staging

build system fixes

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# gpg:                using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg:                issuer "pbonzini@redhat.com"
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* tag 'for-upstream' of https://gitlab.com/bonzini/qemu:
  meson.build: Disable -fzero-call-used-regs on OpenBSD
  Makefile: fix use of -j without an argument

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2024-04-12 16:01:04 +01:00
commit be72d6ab36
2 changed files with 12 additions and 3 deletions
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9
Makefile
View file

@ -141,8 +141,13 @@ MAKE.n = $(findstring n,$(firstword $(filter-out --%,$(MAKEFLAGS))))
MAKE.k = $(findstring k,$(firstword $(filter-out --%,$(MAKEFLAGS))))
MAKE.q = $(findstring q,$(firstword $(filter-out --%,$(MAKEFLAGS))))
MAKE.nq = $(if $(word 2, $(MAKE.n) $(MAKE.q)),nq)
NINJAFLAGS = $(if $V,-v) $(if $(MAKE.n), -n) $(if $(MAKE.k), -k0) \
$(or $(filter -l% -j%, $(MAKEFLAGS)), $(if $(filter --jobserver-auth=%, $(MAKEFLAGS)),, -j1)) \
NINJAFLAGS = \
$(if $V,-v) \
$(if $(MAKE.n), -n) \
$(if $(MAKE.k), -k0) \
$(filter-out -j, \
$(or $(filter -l% -j%, $(MAKEFLAGS)), \
$(if $(filter --jobserver-auth=%, $(MAKEFLAGS)),, -j1))) \
-d keepdepfile
ninja-cmd-goals = $(or $(MAKECMDGOALS), all)
ninja-cmd-goals += $(foreach g, $(MAKECMDGOALS), $(.ninja-goals.$g))

6
meson.build
View file

@ -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'