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# SPDX-License-Identifier: GPL-2.0
# taken from perf which was based on Linux Kbuild
# try-cc
# Usage: option = $(call try-cc, source-to-build, cc-options)
try-cc = $(shell sh -c \
'TMP="$(BUILD_OUTPUT)$(TMPOUT).$$$$"; \
echo "$(1)" | \
$(CC) -x c - $(2) -o "$$TMP" > /dev/null 2>&1 && echo y; \
rm -f "$$TMP"')
define SOURCE_PTRACE
#include <stdio.h>
#include <sys/ptrace.h>
int main (void)
{
int ret;
ret = ptrace(PTRACE_ATTACH, 0, NULL, 0);
ptrace(PTRACE_TRACEME, 0, NULL, 0);
ptrace(PTRACE_GETSIGINFO, 0, NULL, NULL);
ptrace(PTRACE_GETEVENTMSG, 0, NULL, NULL);
ptrace(PTRACE_SETOPTIONS, NULL, NULL,
PTRACE_O_TRACEFORK |
PTRACE_O_TRACEVFORK |
PTRACE_O_TRACECLONE |
PTRACE_O_TRACEEXIT);
ptrace(PTRACE_CONT, NULL, NULL, 0);
ptrace(PTRACE_DETACH, 0, NULL, NULL);
ptrace(PTRACE_SETOPTIONS, 0, NULL,
PTRACE_O_TRACEFORK |
PTRACE_O_TRACEVFORK |
PTRACE_O_TRACECLONE |
PTRACE_O_TRACEEXIT);
return ret;
}
endef
define SOURCE_AUDIT
#include <stdio.h>
#include <libaudit.h>
int main (void)
{
char *name;
int ret;
ret = audit_detect_machine();
if (ret < 0)
return ret;
name = audit_syscall_to_name(1, ret);
if (!name)
return -1;
return ret;
}
endef
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