strace: Define own sigmask macro if not defined already in signal.h

This is required especially on uclibc systems where BSD compatible
obsolete functions are disabled by kconfig. Therefore we check
if the macro is undefined then we define it. Therefore eglibc/glibc
builds should work as they use to.

(From OE-Core rev: 60d91ffc6367fe11ced5890240c6b65ada66621e)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/strace/strace-4.5.20/sigmask.patch

@@ -0,0 +1,22 @@
+sigmask is a macro which is dropped if BSD compatibility is
+not enabled. So we check if the macro does not exist then
+we define it to __sigmask
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Index: strace-4.5.20/signal.c
+===================================================================
+--- strace-4.5.20.orig/signal.c	2010-02-23 13:26:16.000000000 -0800
++++ strace-4.5.20/signal.c	2011-07-20 23:06:35.842339197 -0700
+@@ -140,6 +140,11 @@
+ #endif
+ #endif /* LINUX */
+ 
++#if !defined (sigmask) && defined (__sigmask)
++/* Compute mask for signal SIG.  */
++#define sigmask(sig)   __sigmask(sig)
++#endif /* sigmask */
++
+ const char *const signalent0[] = {
+ #include "signalent.h"
+ };

meta/recipes-devtools/strace/strace_4.5.20.bb

@@ -3,9 +3,11 @@ HOMEPAGE = "http://strace.sourceforge.net"
 SECTION = "console/utils"
 LICENSE = "BSD"
 LIC_FILES_CHKSUM = "file://COPYRIGHT;md5=4535377ede62550fdeaf39f595fd550a"
-PR = "r1"
+PR = "r2"
 
-SRC_URI = "${SOURCEFORGE_MIRROR}/strace/strace-${PV}.tar.bz2"
+SRC_URI = "${SOURCEFORGE_MIRROR}/strace/strace-${PV}.tar.bz2 \
+           file://sigmask.patch \
+          "
 
 SRC_URI[md5sum] = "64dfe10d9db0c1e34030891695ffca4b"
 SRC_URI[sha256sum] = "ea8c059369eaa5ad90b246f34eab247d0ee48bfdee2670c7196320a4669ccabd"