| |
| # 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 |
