crtools: check for setproctitle_init

Check for setproctitle_init, as old versions of libbsd don't have one.
Reported-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Ruslan Kuprieiev <kupruser@gmail.com>
Acked-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

Makefile.config

@@ -32,6 +32,9 @@ ifeq ($(call try-cc,$(PTRACE_PEEKSIGINFO_TEST),),y)
 endif
 ifeq ($(VDSO),y)
 	$(Q) @echo '#define CONFIG_VDSO' >> $@
+endif
+ifeq ($(call try-cc,$(SETPROCTITLE_INIT_TEST),-lbsd),y)
+	$(Q) @echo '#define CONFIG_HAS_SETPROCTITLE_INIT' >> $@
 endif
 	$(Q) @echo '#endif /* __CR_CONFIG_H__ */' >> $@
 

include/setproctitle.h

@@ -4,7 +4,15 @@
 #ifdef CONFIG_HAS_LIBBSD
 #include <bsd/unistd.h>
 #else
+
+/*
+ * setproctitle_init is in the libbsd since v0.6.0. This macro allows to
+ * compile criu with libbsd<0.6.0.
+ */
+#ifndef CONFIG_HAS_SETPROCTITLE_INIT
 #define setproctitle_init(argc, argv, envp)
+#endif
+
 #define setproctitle(fmt, ...)
 #endif
 

scripts/feature-tests.mak

@@ -79,3 +79,16 @@ int main(void)
 }
 
 endef
+
+define SETPROCTITLE_INIT_TEST
+
+#include <bsd/unistd.h>
+
+int main(int argc, char *argv[], char *envp[])
+{
+	setproctitle_init(argc, argv, envp);
+
+	return 0;
+}
+
+endef