Detect prctl availability when configuring.

git-svn-id: http://voip.null.ro/svn/yate@2730 acf43c95-373e-0410-b603-e72c3f656dc1

configure.in

@@ -93,6 +93,20 @@ AC_HEADER_TIME
 AC_TYPE_SIGNAL
 AC_CHECK_FUNCS([malloc gettimeofday inet_ntoa memmove strerror], , [AC_MSG_ERROR([This function is required.])])
 
+HAVE_PRCTL=""
+AC_MSG_CHECKING([for prctl])
+have_prctl="no"
+AC_TRY_COMPILE([
+#include <sys/prctl.h>
+],[
+prctl(1,2,3,4,5);
+],have_prctl="yes")
+AC_MSG_RESULT([$have_prctl])
+if [[ "$have_prctl" = "yes" ]]; then
+HAVE_PRCTL="-DHAVE_PRCTL"
+fi
+AC_SUBST(HAVE_PRCTL)
+
 AC_CACHE_SAVE
 
 SAVE_LIBS="$LIBS"

engine/Makefile.in

@@ -83,7 +83,7 @@ strip: all
 	-strip --strip-debug --discard-locals ../$(YLIB)
 
 Engine.o: @srcdir@/Engine.cpp $(MKDEPS) $(EINC) ../yateversn.h ../yatepaths.h
-	$(COMPILE) @FDSIZE_HACK@ -c $<
+	$(COMPILE) @FDSIZE_HACK@ @HAVE_PRCTL@ -c $<
 
 Channel.o: @srcdir@/Channel.cpp $(MKDEPS) $(PINC)
 	$(COMPILE) -c $<
@@ -101,7 +101,7 @@ Mutex.o: @srcdir@/Mutex.cpp $(MKDEPS) $(CINC)
 	$(COMPILE) @MUTEX_HACK@ -c $<
 
 Thread.o: @srcdir@/Thread.cpp $(MKDEPS) $(CINC)
-	$(COMPILE) @THREAD_KILL@ -c $<
+	$(COMPILE) @THREAD_KILL@ @HAVE_PRCTL@ -c $<
 
 Client.o: @srcdir@/Client.cpp $(MKDEPS) $(CLINC)
 	$(COMPILE) -c $<