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build: move stack protector flag selection to meson

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Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-10-12 12:46:23 +02:00
parent 6739825aa6
commit 911d4caaa2
4 changed files with 34 additions and 43 deletions
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28
meson.build
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@ -200,7 +200,7 @@ foreach arg : config_host['QEMU_CFLAGS'].split()
endif
endforeach
qemu_objcflags = config_host['QEMU_OBJCFLAGS'].split()
qemu_ldflags = config_host['QEMU_LDFLAGS'].split()
qemu_ldflags = []
if get_option('gprof')
qemu_common_flags += ['-p']
@ -211,6 +211,32 @@ if get_option('prefer_static')
qemu_ldflags += get_option('b_pie') ? '-static-pie' : '-static'
endif
if not get_option('stack_protector').disabled()
stack_protector_probe = '''
int main(int argc, char *argv[])
{
char arr[64], *p = arr, *c = argv[argc - 1];
while (*c) {
*p++ = *c++;
}
return 0;
}'''
have_stack_protector = false
foreach arg : ['-fstack-protector-strong', '-fstack-protector-all']
# We need to check both a compile and a link, since some compiler
# setups fail only on a .c->.o compile and some only at link time
if cc.compiles(stack_protector_probe, args: ['-Werror', arg]) and \
cc.links(stack_protector_probe, args: ['-Werror', arg])
have_stack_protector = true
qemu_cflags += arg
qemu_ldflags += arg
break
endif
endforeach
get_option('stack_protector') \
.require(have_stack_protector, error_message: 'Stack protector not supported')
endif
coroutine_backend = get_option('coroutine_backend')
ucontext_probe = '''
#include <ucontext.h>